aftersales service manual voith retarder vr 123€¦ · voith turbo aftersales service manual voith...

Voith Turbo

Aftersales Service Manual Voith Retarder VR 123

153.000182.10 I 2005-05

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Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Table of Contents

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Table of Contents

1 About this Document 5

1.1 Purpose of this Document 61.2 Target Groups 61.3 Other Applicable Documents 61.4 Symbols and Identifications 71.5 Item Numbers 71.6 Legal/Contact Information 7

2 Basic Safety Instructions 8

2.1 Product Safety 92.2 Staff Qualification 92.3 Safety-Conscious Working 92.4 Environmental Protection 92.5 Troubleshooting 92.6 Maintenance and Repair 92.7 Driving Mode 92.8 Warranty 10

3 Design and Function 11

3.1 Overview of the Modules 123.2 Retarder Identification 143.3 VERATM Controller Identification 153.4 Digiprop Controller Identification 16

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3.5 Function and Control Scheme 173.6 Function Description 18

4 Maintenance and Service 19

4.1 Maintenance Intervals 204.2 Oil Change 214.3 Checking the Oil Level 234.4 Draining the Coolant 254.5 Proportional Valve and Damping Plate 27

5 Diagnosis and Troubleshooting 28

5.1 Troubleshooting Chart 295.2 Electrical Connections Diagram and Pin Assignment (VERATM) 335.3 Troubleshooting (VERATM) 365.4 Electrical Connections Diagram and Pin Assignment (Digiprop) 465.5 Troubleshooting (Digiprop) 515.6 Constant-Air Pressure (py) 615.7 Pump Pressure (pdyn) 645.8 Proportional Valve Current 67

6 Removing and Installing the Retarder 69

7 Repair 70

7.1 Components Overview 717.2 Top Cover 757.3 Casing Ventilation 777.4 Retarder Ventilation 81

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7.5 Non-Return Valve 827.6 Heat Exchanger 847.7 Water Neck 877.8 Oil Temperature Sensor 897.9 Coolant Temperature Sensor 917.10 Pressure Sensor 937.11 Proportional Valve and Damping Plate 96

8 Appendix 98

8.1 Tightening Torques 99

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I About this Document

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1. About this Document

1.1 Purpose of this Document 6

1.2 Target Groups 6

1.3 Other Applicable Documents 6

1.4 Symbols and Identifications 7

1.5 Item Numbers 7

1.6 Legal/Contact Information 7

Purpose of this DocumentVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I About this Document

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1.1 Purpose of this Document

This Aftersales Service Manual provides information and instructions on maintenance and repair of the Voith Retarder VR 123.

1.2 Target Groups

This Aftersales Service Manual is intended for service people for service and diagnoses only and may not be reproduced or given to third parties.

1.3 Other Applicable Documents

Documents Information Item number

Voith retarder oil change intervals/oil specification list Oil change intervals and approved oil types 153.000831xx

Operating instructions for Voith Retarder VR 123 Information on the safe, professional and economical operation of the Voith Retarder VR 123

153.00102710

Cooling water quality list Approved coolants H67.2224xx

Operating instructions for retarder tester Measured values for constant-air pressure and pump pressure Included in scope of delivery of the retarder tester (153.001085xx)

Operating instructions for Diana-Lite test software Information on the testing of:

• constant-air pressure (py)

• pump pressure (pdyn)

Included in the scope of delivery of the Diana-Lite test software (153.000776xx)

Operating instructions for the WinDia diagnostic soft-ware

Instructions on PC diagnosis for the Digiprop and VERATM controllers 3623-020900

Gearbox-specific documents on the retarder Information on safe, professional installation and removal of the retarder on request

Symbols and IdentificationsVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I About this Document

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1.4 Symbols and Identifications

Structure of warnings

Levels of danger

The warnings are categorised into four levels of dan-ger:

Notes

Distinctions

One-step action instruction.

1. First step of an action instruction. Other steps fol-low and are numbered in sequence.

1.5 Item Numbers

The item numbers used are usually found in the spare parts lists.

Exceptions:

• one- or two-digit item numbers

• item numbers with a slash

1.6 Legal/Contact Information

For questions and work procedures not described in these documents, contact the respective organisation for your area.

Voith Turbo Produktgruppe Retarder

Postfach 1555 74555 Crailsheim Deutschland

Phone: 00 49 79 51 / 32-401, 32-422, 32-1860Fax: 00 49 79 51 / [email protected]

Type and source of danger!

Possible consequences if not heeded.

Measures for the prevention of danger and its

consequences.

Potentially hazardous situation which, if not avoided,

may result in property damage.


may result in minor or moderate injury.

LEVEL OF DANGER

CAUTION

CAUTION


could result in death or serious injury.

Imminently hazardous situation which, if not avoid-

ed, will result in death or serious injury.

Information on easier and safer work with the re-tarder.

Measures for easier and safer work with the re-tarder.

WARNING

DANGER

NOTE

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Basic Safety Instructions

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2. Basic Safety Instructions

2.1 Product Safety 9

2.2 Staff Qualification 9

2.3 Safety-Conscious Working 9

2.4 Environmental Protection 9

2.5 Troubleshooting 9

2.6 Maintenance and Repair 9

2.7 Driving Mode 9

2.8 Warranty 10

Product SafetyVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Basic Safety Instructions

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2.1 Product Safety

The retarder is constructed according to state of the art technology and acknowledged safety regulations.

Nevertheless, hazardous situations and property damage may occur as a result of improper usage, maintenance and repair.

Observe safety and warning information.

2.2 Staff Qualification

Allow only qualified professionals to carry out repair

and maintenance work.

2.3 Safety-Conscious Working

Voith does not assume any liability for personal injury and/or property damage caused by improper and un-professional work.

Observe the following regulations:

- Accident-prevention regulations

- Other generally acknowledged safety regula-tions and occupational health

- Motor vehicle regulations

- Safety regulations for handling chemical sub-stances such as oils and greases

2.4 Environmental Protection

Drained fuels and fluids, consumables and old parts

must be disposed of properly.

2.5 Troubleshooting

Voith provides a warranty/goodwill service for defec-tive parts only.

Do not replace parts on mere speculation.

2.6 Maintenance and Repair

Danger of burning and scalding by squirting oil!

The oil in the retarder may be hot.

Switch off the retarder and ignition so that the oil is

not fed by impulse lubrication.

Danger of burning and scalding by hot coolant!

The coolant may be hot.

Work carefully.

Danger of burns by hot parts!

Parts of the retarder may be hot.

Work carefully.

Wear protective gloves or use cloths if necessary.

Damage to property by soiled parts!

Considerable damage or malfunctions may occur due to soiling.

Ensure cleanliness.

Damage to property by improper cleaning!

Do not aim the jet of a high-pressure cleaner

(steam-jet device) at valves, pressure sensors or

ventilators of the retarder.

2.7 Driving Mode

Ensure that the retarder is fully functional for all ve-

hicle manoeuvres, i.e.:

- Retarder properly filled with oil

- Retarder electronics connected and functional

- Pneumatic control connected and functional

Driving after repair/oil change

For proper ventilation of the retarder system, do not

activate the retarder until you are driving:

- Min. speed: 50 km/h

- Retarder braking stage 1

- Activate five times for 5 s each

WarrantyVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Basic Safety Instructions

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Towing

Tow vehicle with retarder max. 100 km at max.

40 km/h.

Parking

Do not use retarder as a parking brake, as it does

not act as a brake when the vehicle is standing still.

Failure while driving

During failure of the retarder, or while temperature ad-aptation is active, only the service brake is functional.

Adjust the speed of the vehicle with the service

brake.

Engage the lowest possible gear to achieve a high

engine speed.

Continue driving in this way until the retarder is

available at full capacity again.

2.8 Warranty

Voith accepts no liability for damage caused by changes to the retarder or the use of spare parts, ac-cessories, attachments and special features not test-ed and approved by Voith.

Use only parts approved by Voith to ensure the

safety of the vehicle.

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3. Design and Function

3.1 Overview of the Modules 12

3.2 Retarder Identification 14

3.3 VERATM Controller Identification 15

3.4 Digiprop Controller Identification 16

3.5 Function and Control Scheme 17

3.6 Function Description 18

Overview of the ModulesVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3.1 Overview of the Modules

Item No. Designation

100 Retarder housing

1500 Screw plug M14x1.5(test connection)

1900 Non-return valve

2000 Cover of retarder housing

2800 Oil filler plug M30x1.5

3000 Top cover

5000 Proportional valve

5100 Damping plate

7000 Pressure sensor

32002

1500

1900

7000

100

2800 3000

5000

5100

2000

Overview of the ModulesVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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1500 Screw plug M14x1.5

1700 Screw plug M24x1.5

8000 Oil temperature sensor

9000 Rating plate

20000 Water neck inlet

20100 Water neck outlet

20200 Coolant drain plug M14x1.5

20600 Coolant temperature sensor

Kd.-Sach-Nr.Voith-Sach-Nr.

TYP VR 123FABR.Nr.BaujahriRET = 1.00

20000

8000

9000

32003

20200

20600

1700

1500

20100

Retarder IdentificationVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3.2 Retarder Identification

Specify the following data in case you have questions or are ordering spare parts:

- Serial number (FABR.Nr.)

- Voith part number (Voith-Sach-Nr.)

32004

Kd.-Sach-Nr.

Voith-Sach-Nr.

TYP VR 123

FABR.Nr.

Baujahr

iRET = 1.00

Kd.-Sach-Nr.

Voith-Sach-Nr.

TYP VR 123

FABR.Nr.

Baujahr

iRET = 1.00

NOTE

VERATM Controller Identification Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3.3 VERATM Controller Identification


- Serial number (Serial-No.)

- Part number (Part No.)

Specify the following data of the retarder (see page 14):



Retarder Control Unit

Serial-No. XXXXX / JJJJ-MM-TT

Part No. VERA.E.X - XXX.XX-XXXXXXXXXXXX

OEM No. XXXXXXXXXXXXX

X1 X2 X3

e1 022084

VO

ITH

Reta

rder C

ontrol U

nit

Serial-N

o. XXXXX /

JJJJ-MM

-TT

Part N

o. V

ERA

.E.X

- XXX.X

X-XXXXXXXXXXXX

OEM

No.

XXXXXXXXXXXXX

VOITH

VOITH

X1

X2

X3

e1 022084

Vo

ith

Tu

rbo

Voith Turbo

Voith Turbo

32006

NOTE

Digiprop Controller IdentificationVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3.4 Digiprop Controller Identification


- Basic number (Basis-Nr.:)

- Serial number (Serien-Nr.:)

Specify the following data of the retarder (see page 14):



Basis-Nr.:

53.xxxx.12

Code-Nr.:

xxx

Serien-Nr.: xxxx/

VOITH

Basis-Nr.:

Code-Nr.:

Serien-Nr.:

VOITH

32084

NOTE

Function and Control SchemeVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3.5 Function and Control SchemeItem No. Designation

A Compressed-air line (pressure controller)B Four-circuit protection valveC Compressed-air line (brake circuit 2)D Compressed-air line (brake circuit 1)E Compressed-air line (parking brake)F Air tank for auxiliary equipmentG Supply-air pressure (pv) "P"

H Constant-air pressure (py) "A"

I Ventilation line "R"J Oil tankK Rising duct

300 Stator1500 Oil drain plug1700 Oil drain plugs1900 Non-return valve2300 Casing ventilation2800 Oil filler plug (measuring point Py)

3300 Retarder ventilation4000 Rotor5000 Proportional valve6000 Heat exchanger7000 Pressure sensor8000 Oil temperature sensor


A R

P

G

H7000

5000

20600

6000

J

28002300

3300

8000

1700

4000

300

K

1900

32007

I

FBA

E

D

C

1500

Vehicle electro-

Oil sump

Supply-air pressure pv

Constant-air pressure py

Coolant

Pump Pressure Pdyn

Function DescriptionVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Design and Function

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3.6 Function Description

Application and point of installation

The Voith Retarder VR 123 is a compact hydrodynam-ic sustained-action brake for mid-sized omnibuses and commercial vehicles up to 18 tonnes. By installing it between the gearbox and rear axle, the braking torque of the retarder also remains in tact while shifting gears.

Non-return valve (1900)

The non-return valve (1900) is located in the outlet duct and prevents the heat exchanger being emptied during idling.

Casing ventilation (2300)

At the beginning of the braking process, the oil expels the air located in the system circuit from the retarder via the casing ventilation (2300). Once the system circuit is free of air, a float will rise and seal the casing ventilation.

Proportional valve (5000)

Depending on the intensity of the electric input signal, the proportional valve (5000) issues a pneumatic con-stant-air pressure which acts on the oil tank of the re-tarder.

Pressure sensor (7000)

The pressure sensor (7000) measures the pneumatic constant-air pressure. A deviation from the allowed pressure tolerance is recognized as a fault and dis-played by the controller.

Temperature sensors for oil (8000) and coolant (20600)

The temperature sensors are screwed into the cooling system of the vehicle (return pipe from retarder to heat exchanger) and in the oil duct of the retarder. The temperature sensors pass on information on the tem-perature of the coolant and oil to the controller.

Maximum values for the temperature of coolant and oil are set in the controller for protection of the cooling system and the retarder. To prevent the values being exceeded, the controller adapts the braking torque of the retarder accordingly via the constant-air pressure py.

The braking torque and the heat produced regulate themselves until an equilibrium has been reached be-tween the braking force and the heat dissipated via the vehicle cooling system.

If the temperature limit is exceeded during braking, the braking torque is adapted to protect the cooling system and retarder.

If the critical temperature threshold has been exceed-ed, the braking torque is no longer active.

The controller also adjusts the braking torque if the temperature of the oil increases rapidly, regardless of the actual temperature of the oil.

During temperature adaptation or failure of the retard-er, you must use the service brake to slow down the vehicle.

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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4. Maintenance and Service

4.1 Maintenance Intervals 20

4.2 Oil Change 21

4.3 Checking the Oil Level 23

4.4 Draining the Coolant 25

4.5 Proportional Valve and Damping Plate 27

Maintenance IntervalsVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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4.1 Maintenance Intervals

The maintenance intervals depend on the stress put on the retarder.

Activity Interval See

Change oil See document: Oil change intervals/oil specification list 153.000831xx

Page 21

Check oil level

– Page 23

Drain coolant Observe specifica-tions of vehicle manufacturer

Page 25

Replace pro-portional valve

For vehicles used in city traffic: 120,000 km

Page 27

Oil ChangeVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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4.2 Oil Change


1400 Sealing ring A14x18, replace

1500 Screw plug M14x1.5,hexagon socket head, w.a.f. 6,25 Nm



2800 Oil filler plug M30x1.5,hexagon socket head, w.a.f. 17,130 Nm


Lubricate sealing rings, O-rings and shaft seal-ing rings with silicone-free, non-corrosive grease before installation.

Oil quantity

Service filling (oil check, oil change) 6.0 l

After replacement of heat exchanger 6.5 l

32008

2800

2900

1700

1600

1500

1400

1700

1600

NOTE

Oil ChangeVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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Maintenance work during each oil change

• Visual inspection of retarder for leaks before and after the oil change.

• Check prop shaft screws for proper seating and tighten if necessary (See specifications of vehicle manufacturer).

• Tighten screw plugs of retarder basic module to the specified tightening torque (see page 98).

Requirements

• Vehicle is horizontal

• Oil is at operating temperature (> 60 °C)

• Retarder switched off

• Ignition switched off

Draining the oil

1. Place oil pan below the retarder.

2. Unscrew the oil filler plug (2800).

3. Unscrew the screw plugs (1500 and 1700).

4. Drain oil into an oil collecting pan.

5. Lubricate the new sealing rings (1400 and 1600) with silicone-free, non-corrosive grease.

6. Screw in screw plugs (1500 and 1700) with sealing rings (1400 and 1600).

7. Tighten screw plug (1500) to 25 Nm.

8. Tighten screw plugs (1700) to 80 Nm.

Filling in the oil

1. Fill in oil via the hole of the oil filler plug (2800).

2. Lubricate the new sealing ring (2900) with sili-cone-free, non-corrosive grease.

3. Screw in the oil filler plug (2800) with sealing ring (2900) and tighten to 130 Nm.

Hot exiting oil!

Face and hands could be burned.

Ensure that the retarder and ignition are switched

off.

WARNING

Hot oil filler plug (2800) and screw plugs (1500

and 1700)!

Hands could be burned.

Work carefully.


CAUTION

Wrong oil type!

Damage to/failure of the retarder.

Use only oil approved by Voith (see oil specifica-

tion list).

For proper ventilation of the retarder system, do not activate the retarder until you are driving:




CAUTION

NOTE

Checking the Oil LevelVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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4.3 Checking the Oil Level






2800 Oil filler plug M30x1.5,hexagon socket head, w.a.f. 17,130 Nm



Oil quantity

Service filling (oil check, oil change)

6.0 l

32008

2800

2900

1700

1600

1500

1400

1700

1600

NOTE

Checking the Oil LevelVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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Requirements

• Vehicle is horizontal

• Oil is at operating temperature (> 60 °C)



Drain the oil

1. Place oil pan below the retarder.

2. Unscrew the oil filler plug (2800).

3. Unscrew the screw plugs (1500 and 1700).

4. Drain oil into an oil collecting pan.

5. Lubricate the new sealing rings (1400 and 1600) with silicone-free, non-corrosive grease.

6. Screw in screw plugs (1500 and 1700) with sealing rings (1400 and 1600).

7. Tighten screw plug (1500) to 25 Nm.

8. Tighten screw plugs (1700) to 80 Nm.

Measuring the volume

1. Measure the volume of the drained oil.

2. If oil is missing, top up oil.

Filling in the oil

1. Fill in oil via the hole of the oil filler plug (2800).

2. Lubricate the new sealing ring (2900) with sili-cone-free, non-corrosive grease.

3. Screw in the oil filler plug (2800) with sealing ring (2900) and tighten to 130 Nm.

Hot exiting oil!

Face and hands could be burned.

Ensure that the retarder and ignition are switched

off.

Hot oil filler plug (2800) and screw plugs (1500

and 1700)!


Work carefully.


WARNING

CAUTIONWrong oil type!


Use only oil approved by Voith (see oil specifica-

tion list).

CAUTION

If oil was missing, check the retarder for leaks.

For proper ventilation of the retarder system, do not activate the retarder until you are driving:




NOTE

NOTE

Draining the CoolantVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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4.4 Draining the Coolant

Requirements








Hot parts and coolant!

Burns and scalding could occur.

Work carefully.


32085

20200

Kd.-Sach-Nr.

Voith-Sach-Nr.

TYP R 123

FABR.Nr.

Baujahr

iRET = 1.00

20300

20100

NOTE

CAUTION

Draining the CoolantVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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1. Unscrew the screw plug (20200) and drain the coolant into a clean collecting vessel.

2. Replace the sealing ring (20300) and lubricate it with silicone-free, non-corrosive grease.

Observe the specifications of the vehicle manu-facturer or those of Voith Turbo cooling water quality list.

NOTE

Proportional Valve and Damping PlateVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Maintenance and Service

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4.5 Proportional Valve and Damping Plate

For vehicles used in city traffic: Replace propor-tional valve at intervals of 120,000 km (see page 96).

NOTE

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5. Diagnosis and Troubleshooting

5.1 Troubleshooting Chart 29

5.2 Electrical Connections Diagram and Pin Assignment (VERATM) 33

5.3 Troubleshooting (VERATM) 36

5.4 Electrical Connections Diagram and Pin Assignment (Digiprop) 46

5.5 Troubleshooting (Digiprop) 51

5.6 Constant-Air Pressure (py) 61

5.7 Pump Pressure (pdyn) 64

5.8 Proportional Valve Current 67

Troubleshooting ChartVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.1 Troubleshooting Chart

Complaint

Voith Retarder

VR 123

Retarder

pilot light

(standard type)

No or

insufficient

brake efficiency

*

Oil leak

on drive

or output side

Oil leaks via

retarder ventilation

(item 3300)

or holes in lid of

casing ventilation

**Contact

VOITH

A

B

C

On-board diagnosis is possible if the

OEM equipment allows it (display).

Observe the specifications of the

vehicle manufacturer.

*

** This fault may be due to a leak in

the transmission or in the retarder.

A thorough analysis is therefore necessary.32034_e


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On-board diagnosis is possible if the

OEM equipment allows it (display).

Observe the specifications of the

vehicle manufacturer.

Retarder on: Braking torque greater than 0Retarder off: Fault (fault code ?)

A

FLASHES

IO

NIOCheck theoperation

(for retarder braking,nominal speed of

the engine,if possible)

IO

NIOCheck

temperaturesensors

(oil/coolant)

Replacedefective part

Check the vehiclecooling system: - coolant level- thermostat- coolant pump- fan- radiator net for dirtIO = in order

NIO = not in order

*

Contact the vehiclemanufacturer

ON

No functionwith ignition ON

** Retarder

pilot light

(standard type)

Temperatureadaptation

Instructthe driver!

32035_e

(see page 89 onw.)


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32036_e

B

Replacedefective part

IO = in order

NIO = not in order

Check the dampingplate. Are/is there(an) outward leak?

Check thecasing ventilation

Replace thecasing ventilationIO NIO

p (dyn)

NIOp (static)

NIOy

Compressed-air lineto the proportionalvalve interrupted

or leaky

Repair compressed-airline according to

vehicle manufacturer

Check the proportionalvalve, replace if necessary

Contactthe vehicle

manufacturer

The retarderoil level must be

correct for checking!If the static and dynamic pressure are

in order, the complaint mentionedabove cannot be made.

Clarify the complaint again with thecustomer or perform the tests once again.

IO

NIO

Checkp (dyn) andp (static)

IO NIO

IO NIO

Check the prop.current as wellas leads and

plug connections

IO

NIOCheck the

temperature sensors(oil/coolant), pressure

sensor and leadsCheck the

control system

Check the supply-air pressure

IO NIO

Check the vehiclepneumatic

system

YesNo

External oil leak(except for retarder

ventilation item 3300)?

Repairthe retarder

Check theretarder oil level

Correct retarderoil level

If the problemoccurs again:continue with

NIO

IO

ContactVOITH

Replace thedamping plate

YesNo

Heavy air consumptionvia retarder ventilation

(item 3300)?

IONIO

Check thedamping plate

ContactVOITH

YesNo Replace the damping plate

No or

insufficient

brake efficiency

y

(see page 23)

(see page 77)

(see page 96)

(see page 89 onw.)

(see page 67)

(see page 96)

(see page 96)

(see page 61)


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32069_e

C

IO = in order

NIO = not in order

NIOIO

Check thecasing ventilation

Replacecasing ventilation

Retarderventilation(item 3300)

ContactVOITH

NIOIO

Check theretarder oil level

Is there waterin the oil?

YesNo

Correctoil level

Check heatexchanger

If the problemoccurs again:

Contact VOITH

Holes in coverof casingventilation

Oil leaks via

retarder ventilation

(item 3300) or

holes in lid of

casing ventilation

(see page 77)(see page 23)

(see page 84)

Electrical Connections Diagram and Pin Assignment (VERATM)Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.2 Electrical Connections Diagram and Pin Assignment (VERATM)


2 Controller

4 Terminal 15

16 Actuating lever for engine control/sustained-action brake

17 Retarder pilot light (option)




72 Pressure sensor

83 ISO diagnosis

32010

4

2

X1

X2X3

8 94 56 13 23 2 16549 7 1210 118

21

18 1716 654 8 9 10 11 12 13 1415 7 3 12

7

-+

19

+ -

201 2 4

P U 72

17

4.

CAN

-+

16

83


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Plug X1 controller

Plug X3 controller

The diagrams show the plugs from the plug-in side.


1 CAN-LOW

2 CAN-GROUND

3 CAN-HIGH

4 Actuating lever for engine control/sustained-action brake, safety contact

5 Actuating lever for engine control/sustained-action brake, position 1


NOTE

32041

147101316

258111417

369121518

7 Terminal 15 = battery voltage



10 Actuating lever for engine control/sustained-action brake +

11 not assigned

12 ISO interface, K-lead

13 not assigned

14 Terminal 31 = Ground

15 Retarder pilot light (option)

16 not assigned

17 not assigned




1 Coolant temperature sensor –

2 Coolant temperature sensor +

3 Proportional valve +

4 Proportional valve –

5 Oil temperature sensor +

6 Oil temperature sensor –

7 Signal voltage pressure sensor

8 Ground pressure sensor

9 Supply voltage pressure sensor

10 not assigned

11 not assigned

12 not assigned

32043

14710

25811

36912


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Plug of coolant and oil temperature sensors Plug proportional valve Plug pressure sensor


1 Temperature sensor, any polarity


32044

1

2


1 Proportional valve, any polarity


32045

1

2


1 Sensor supply

2 Signal

3 Core for pressure compensation

4 Ground

32066

1

2

3

4

Troubleshooting (VERATM)Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.3 Troubleshooting (VERATM) Requirements

• Battery voltage: 18–32 V

• Compressed air: 6–11 bar

• Oil level checked and in order

• Electrical system of vehicle checked and in order (see specifications of vehicle manufacturer)

• Fuses for retarder controller tested and in order

Procedure

1. Read out the fault memory:

- with Win-Dia (see operating instructions of Win-Dia diagnostic software)

- on-board diagnosis (see specifications of vehi-cle manufacturer)

2. Evaluate fault code and remedy fault (see

“Troubleshooting with fault codes (VERATM)” on page 37).

3. Clear fault memory (see operating instructions of WinDia diagnostic software).

The fault memory can be read out in the following ways:

• with Win-Dia (see operating instructions of Win-Dia diagnostic software)

• on-board diagnosis (display) (see specifications of vehicle manufacturer)

Special tools

Connecting cable

PC interface

NOTE

H53.8206.12

PC Interface

VTVC Nr.:

53.8206.12


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Troubleshooting with fault codes (VERATM)

(type: Daimler Chrysler)

Requirements

• Ground (terminal 31) connected to pin 15 (plug X1)

• Battery voltage (terminal 15) connected to pins 13 and 7 (plug X1)

When performing measurements using a commer-cially available multimeter (without real r.m.s. value measurement), exact readout of these measured values is not possible (display jumps).

Commercially available tool

Multimeter (98/8) with real r.m.s. value measure-ment, e.g. Fluke 179

NOTEOnly if no fault is detected during complete check of the periphery:

Replace controller.

X1/10 Ω X1/18 in the "Measurement" column, for example, means the following:

• Pin 10 to plug X1 (retarder controller)

• Multimeter measuring type: ohms

• Pin 18 to plug X1 (retarder controller)

NOTE

NOTE


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Fault code

Fault text Cause Fault class

Detec-tion time

Remedy Test step

Requirement /Action

Measurement Setpoint

0 0512 GS/FR: perma-nently or tempo-rarily missing CAN telegram

– slight approx. 0.1 s

GS (EPS) or FR. – – – –

0 1105 Actuating lever for engine control/sustained-action brake: short-cir-cuit to battery

Short-circuit to Ubat in the signal path of the actuating lever for en-gine control/sustained-action brake

slight approx. 1 s

Check the lead, plug and actuating lever for engine control/sustained-action brake.

1 Ignition switched off

Pull plug X1.

Switch on ignition.

X1/14 V X1/4

X1/5

X1/6

X1/8

X1/9

X1/10

X1/18

< 2 V


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0 1140 Actuating lever for engine control/sustained-action brake: mechani-cal defect, im-plausible

Short-circuit to ground

–or–

Interruption in signal path of the actuating le-ver for engine control/sustained-action brake

slight approx. 1 s

Check the lead, plug and actuating lever for engine control/sustained-action brake.


Switch actuating lever for engine control/sus-tained-action brake to step 0.

X1/10 Ω X1/4 < 5 Ω

2 Switch actuating lever for engine control/sus-tained-action brake to highest step.

X1/10 Ω X1/5

X1/6

X1/8

X1/9

X1/18

< 5 Ω

3 X1/10 Ω X1/4 > 1 MΩ

infinite

4 Switch actuating lever for engine control/sus-tained-action brake to step 0.

X1/10 Ω X1/5

X1/6

X1/8

X1/9

X1/18

> 1 MΩ

infinite

Fault code


Detec-tion time

Remedy Test step

Requirement /Action



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0 1607 Oil temperature sensor: short-cir-cuit to ground

Short-circuit to ground in the signal path to the oil temperature sensor

slight 1 s Check lead, plug and oil temperature sen-sor.


Pull plug X3.

X3/5 Ω X1/14 > 1 MΩ

infinite

0 1641 Oil temperature sensor: short-cir-cuit to battery or interruption

Short-circuit to Ubat

–or–

Interruption in signal path to oil temperature sensor

slight 1 s Check leads, plugs and oil temperature sensor.


Pull plug X3.

X3/5 Ω X3/6 Note:Measure-ment in one tempera-ture range is usually sufficient.

10 °C to 30 °C = 1,039 Ω to 1,117 Ω

50 °C to 70 °C = 1,194 Ω to 1,271 Ω

70 °C to 90 °C = 1,271 Ω to 1,347 Ω

0 1808 Pressure sensor:battery short-cir-cuit signal

Short-circuit to Ubatin signal path

slight 1 s Check lead and pres-sure sensor.

1 Ignition switched on


X3/7 V X3/8 0.3–0.7 V

Fault code


Detec-tion time

Remedy Test step

Requirement /Action



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0 1840 Pressure sensor: signal implausible

– slight 10 s Check lead and pres-sure sensor.



X3/7 V X3/8 0.3–0.7 V

0 1842 Pressure sensor: signal interruption or short-circuit to ground

– slight 1 s Check lead and pres-sure sensor.


Pull plugs X1 and X3.

X3/7 Ω X1/14 > 1 MΩ

infinite

0 1843 Pressure sensor: Supply voltage outside admitted range

– slight 0.5 s Check lead and pres-sure sensor.

1 Ignition switched on X3/9 V X3/8 4.75–5.25 V

0 2012 FR: permanently or temporarily missing CAN tele-gram

– slight approx. 0.1 s

Check the FR. – – – –

1 0110 CAN connection to retarder con-troller or CAN-starpoint commu-nication faulted (Bus Off)

Retarder controller does not receive any data telegrams from the vehicle CAN bus

serious – Check CAN bus. – – – –

1 0113 CAN connection to retarder con-troller

Communication fault between controller and vehicle CAN-bus star-point

serious – Check plug connec-tions, leads and vehi-cle CAN-bus starpoint.

– – – –

Fault code


Detec-tion time

Remedy Test step

Requirement /Action



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1 0212 ABS/BS: perma-nently or tempo-rarily missing CAN telegram

– serious approx. 0.1 s

Check ABS or BS. – – – –

1 0820 Retarder control-ler: Internal error

– serious – Replace controller. – – – –

1 0821 Parameterisation faulty

– serious – Contact Voith. – – – –

1 1001 Terminal 15: overvoltage

Overvoltage (> 33 V) at terminal 15

serious 10 s Check the controller and generator.


Pull plug X1.

Switch on ignition.

Start engine and run in medium r.p.m. range.

X1/14 V X1/7 < 33 V

1 1002 Terminal 15: undervoltage

Undervoltage (< 17.5 V) at terminal 15 or inter-ruption in the signal path to the basic mod-ule

serious 60 s Check the battery voltage, leads and plugs.


Pull plug X1.

Switch on ignition.

X1/14 V X1/7 > 17.5 V

1 1330 Proportional valve outlets: short-circuit to battery

Short-circuit to Ubat in signal path to propor-tional valve

–or–

Short-circuit of both out-puts to proportional valve

serious max. 1 s Check the leads, plugs and proportion-al valve.



Switch on ignition.

X1/14 V X3/4 < 2 V


Pull plug X3.

X3/4 Ω X3/3 18–25 Ω

Fault code


Detec-tion time

Remedy Test step

Requirement /Action



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1 1331 Proportional valve outlets: short-circuit to ground

Short-circuit to ground

–or–

Interruption in signal path to proportional valve

serious max. 60 s Check the leads, plugs and proportion-al valve.


Pull plug X3.

X3/4 Ω X3/3 18–25 Ω

2 Pull plug X1. X1/14 Ω X3/3

X3/4

> 1 MΩinfinite

1 1332 Proportional valve outputs

Controller defective serious max. 60 s Replace controller. – – – –

1 1507 Coolant tempera-ture sensor: short-circuit to ground

Short-circuit to ground in the signal path to the coolant temperature sensor

serious 1 s Check leads, plugs and coolant tempera-ture sensor.


Pull plug X3.

X3/2 Ω X1/14 > 1 MΩinfinite

Fault code


Detec-tion time

Remedy Test step

Requirement /Action



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1 1541 Coolant tempera-ture sensor: short-circuit to battery

Short-circuit to Ubat or interruption in the signal path to the coolant tem-perature sensor

serious 1 s Check leads, plugs and coolant tempera-ture sensor.


Pull plug X3.

X3/2 Ω X3/1 Note:Measure-ment in one tempera-ture range is usually sufficient.

10 °C to 30 °C = 1,039 Ω to 1,117 Ω

50 °C to 70 °C = 1,194 Ω to 1,271 Ω

70 °C to 90 °C = 1,271 Ω to 1,347 Ω

1 1705 Retarder pilot light: short-circuit to battery

– serious 3 s Check lead and re-tarder pilot light.



X 1/15 V X 1/14 ≤ 2 V

Fault code


Detec-tion time

Remedy Test step

Requirement /Action



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1 1742 Retarder pilot light: Short-circuit to ground or inter-ruption

– serious 1 s Check lead, retarder pilot light and fuse.


Pull plug X1.

Switch on ignition.

X 1/15 V X 1/14 ≥ 17.5 V

Fault code


Detec-tion time

Remedy Test step

Requirement /Action


Electrical Connections Diagram and Pin Assignment (Digiprop)Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.4 Electrical Connections Diagram and Pin Assignment (Digiprop)


2 Controller

4 Terminal 15

15 ABS signal

16 Actuating lever for engine control/sustained-action brake

17 Retarder pilot light

18 Stop light relays




47 Speedometer signal

69 ISO interface plug

70 Additional functions plug

72 Pressure sensor

18

70 47 15 21

-

- +

+

+ -

19 20

17

4

16

69

4

2

X1

X2X389456132321654971210118

14

8787

a30

13 11 12 10 1 9 5 8 4 3 2 7 6

18 17 16 6 5 4 89 10 11 12 13 14 15 7

43 2 1 4

832567

3 12

7

32086

1 2 4

..

.

P U 72


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Plug X1 controller

Plug X2 controller

The diagrams show the plugs from the plug-in side.


1 not assigned

2 not assigned

3 not assigned




NOTE

32041

147101316

258111417

369121518

7 Terminal 15 = battery voltage




11 ISO-interface, L-lead

12 ISO interface, K-lead

13 connected to terminal 15

14 not assigned

15 Terminal 31 = Ground

16 Universal output

17 not assigned

18 Universal output



1 No function

2 Proportional valve –

3 Proportional valve +

4 Coolant temperature sensor –

5 Coolant temperature sensor +

6 No function

7 not assigned

8 Oil temperature sensor –

9 Oil temperature sensor +

32087

147

258

369


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Plug X3 controller Plug of coolant and oil temperature sensors


1 Universal input

2 Speedometer signal

3 ABS signal

4 Universal input

5 Universal input



8 Retarder pilot light

9 Universal input


11 Stop light relays

32043

14710

25811

36912

12 Universal input





32044

1

2


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Plug proportional valve Plug pressure sensor Plug ISO interface cable




32045

1

2


1 Sensor supply

2 Signal

3 Core for pressure compensation

4 Ground

32066

1

2

3

4


1 K-line

2 L-line

3 Terminal 15

4 Terminal 31

32088

2 1

4 3


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Plug additional functions cable



2 Universal input

3 Universal input

4 Universal input

5 Universal input

6 Universal input




10 Universal output

11 Universal output

32089

2

1

4

3

6

5

8

7

10

9

12

11

14

13

12 No function

13 Terminal 15

14 Terminal 31


Troubleshooting (Digiprop)Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.5 Troubleshooting (Digiprop) Requirements





• Fuses for retarder controller tested and in order

Procedure

1. Read out the fault memory:

- with a service cable (see page 52)

- via the actuating lever for engine control/sustained-action brake (see page 52)


2. Evaluate fault code and remedy fault (see page 53).

3. Clear fault memory:

- with a service cable (see page 52)


Display example of fault code 23

Meanings:

• long signal (2 s): steps of ten

• short signal (0.5 s): steps of one

• Pause (1.0 s) between the signals

Faults are output in the sequence in which they occur. There is a pause of 3 seconds after each fault code. The OFF signal remains if there is only one fault in memory.

The fault memory can be read out in the following ways:

• with a service cable

• via the actuating lever for engine control/sustained-action brake

• with Win-Dia (see operating instructions of Win-Dia diagnostic software)

Faults are saved in the sequence in which they oc-cur.Exception:Fault code 31 "Controller coding fault" is not saved, but it is output.

NOTE

NOTE


E ON signal

A OFF signal

t Time

32047_e

2 s

1 s

0.5

s

1 s

1 s

1 s

0.5

s

0.5

s

2 s


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Reading out the fault memory via the service cable

Requirements


• Vehicle not running

• Ignition switched on

1. Connect service interface L-lead to ground for ≥ 2 s. For this purpose, press "L-pushbutton" on service cable.The fault code of the first fault is output via the retarder pilot light.

2. Repeat Step 1 for additional fault code output.

Clearing the fault memory

1. Turn ignition off.

2. Connect service interface L-lead to ground. For this purpose, press "L-pushbutton" on service cable.

3. Switch on ignition.

4. Disconnect the L-lead from ground after ≥ 2 s.

Reading out fault memory via actuating lever for engine control/sustained-action brake

Requirements

• Service mode activated:

- Vehicle not running

- Ignition switched on

1. Switch actuating lever for engine control/sustained-action brake to position 0.

2. Switch actuating lever for engine control/sustained-action brake to position 1.

3. Switch actuating lever for engine control/sustained-action brake to position 0.The fault code of the first fault is output via the retarder pilot light.

4. Repeat Steps 1–3 for additional fault code output.

Special tools

Service cable Connecting cable

PC interface

99/53

H53.8224xx H53.8206.12

PC Interface

VTVC Nr.:

53.8206.12


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Troubleshooting with fault code

(type: Daimler Chrysler)

Requirements

• Ground (terminal 31) connected to pin 15 (plug X1)

• Battery voltage (terminal 15) connected to pin 7 (plug X1)




Only if no fault is detected during complete check of the periphery:

Replace controller.

NOTE

NOTE

X1/15 Ω X3/11 in the "Measurement" column, for example, means the following:

• Pin 15 to plug X1

• Multimeter measuring type: ohms

• Pin 11 to plug X3

NOTE


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Fault code

Fault text Fault class

Detection time

Remedy Test step

Requirement /Action


01 Stop light relays, short-circuit to ground

slight 1 s Check lead, plug and re-lays or consumers.



X3/11 Ω X1/15 Relays is installed: 250–350 Ω

03 Output HS 1, short-cir-cuit to ground



Pull plug X1.

X1/18 Ω X1/15 Relays is installed: 250–350 Ω

04 Output HS 2, short-cir-cuit to ground



Pull plug X1.

X1/16 Ω X 1/15 Relays is installed: 250–350 Ω

05 Terminal 15 undervolt-age

serious 60 s Check lead, plugs and fuse.


Pull plug X1.

Switch on ignition.

X1/7 V X1/15 ≥ 17.5 V

06 Terminal 15 overvoltage serious 10 s Check electrical system of vehicle (see specifica-tions of vehicle manu-facturer)


Pull plug X1.

Switch on ignition.

Start engine (idle).

X1/7 V X1/15 ≤ 32.5 V


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Fault code


Detection time

Remedy Test step

Requirement /Action


0809

Coolant temp. sensor short-circuit to battery or ground or interruption

serious/

slight a)1 s Check lead and sensor. 1 Ignition switched off

Pull plug X2.

X2/5 Ω X2/4 Note:Measurement in one temperature range is usually sufficient.

10 °C to 30 °C = 1,039 Ω to 1,117 Ω

50 °C to 70 °C = 1,194 Ω to 1,271 Ω

70 °C to 90 °C = 1,271 Ω to 1,347 Ω

1112

Oil temperature sensor, short-circuit to battery or ground or interruption

serious/

slight a)1 s Check lead and sensor. 1 Ignition switched off

Pull plug X2.

X2/9 Ω X2/8 Note:Measurement in one temperature range is usually sufficient.

10 °C to 30 °C = 1,039 Ω to 1,117 Ω

50 °C to 70 °C = 1,194 Ω to 1,271 Ω

70 °C to 90 °C = 1,271 Ω to 1,347 Ω

a) If oil and coolant temperature sensors are simultaneously defective, this is considered a serious fault.


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Fault code


Detection time

Remedy Test step

Requirement /Action


13 Actuating lever for engine control/sustained-action brake in undefined state

serious 1 s Check the lead, plug and actuating lever for en-gine control/sustained-action brake.


Switch actuating lever for engine control/sus-tained-action brake to position 0.

X1/10 V X1/15

X1/6 V X1/15

X1/5 V X1/15

X1/4 V X1/15

X1/9 V X1/15

X1/8 V X1/15

≥ 17.5 V

0 V

0 V

0 V

0 V

0 V

2 Switch actuating lever for engine control/sus-tained-action brake to position 1.

X1/10 V X1/15

X1/6 V X1/15

X1/5 V X1/15

X1/4 V X1/15

X1/9 V X1/15

X1/8 V X1/15

≥ 17.5 V

≥ 17.5 V

0 V

0 V

0 V

0 V

3 Switch actuating lever for engine control/sus-tained-action brake to position 2.

X1/10 V X1/15

X1/6 V X1/15

X1/5 V X1/15

X1/4 V X1/15

X1/9 V X1/15

X1/8 V X1/15

≥ 17.5 V

≥ 17.5 V

≥ 17.5 V

0 V

0 V

0 V


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14 Actuating lever for engine control/sustained-action brake, battery short-cir-cuit

serious 10 s Check lead and plugs. – Ignition switched off

Pull plug X1.

Switch on ignition.


X1/10 V X1/15 0 V

15 Actuating lever for engine control/sustained-action brake, short-circuit to ground

serious 1 s Check each stage for short-circuit to ground.

– Ignition switched off

Pull plug X1.


X1/10 Ω X1/15 > 1 MΩ

infinite

16 Speedometer signal inter-rupted

serious 2 s Check lead and speed-ometer.

– Ignition switched on X3/2 V X1/15 ≤ 1 V

18 Speedometer battery short-circuit/undefined signal

serious 2 s Check lead and speed-ometer.



Switch on ignition.

X3/2 V X1/15 ≤ 9 V

19 ABS Short-circuit to ground

serious 60 s Check lead, relays and ABS controller.

– Ignition switched on X3/3 V X1/15 ≥ 3.5 V

21 ABS signal undefined serious 1 s Check lead, relays and ABS controller.

– Ignition switched on X3/3 V X1/15 ≥ 16.5 V

22 Internal fault ABS current path

serious 1 s Replace controller. – – – –

Fault code


Detection time

Remedy Test step

Requirement /Action



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23 Proportional valve fault 1: short-circuit to battery

serious 1 s Check lead. – Ignition switched off


Switch on ignition.

X2/3 V X1/15 < 2 V

24 Proportional valve fault 2:

• Short-circuit to prop. valve magnet

• Short-circuit to con-necting cable, prop. valve interruption

• Prop. valve magnet

• Interruption of con-necting cable, prop. valve ground short-cir-cuit at prop. valve

serious 1 s Check lead and propor-tional valve (valve block).


Pull plug X2.

X2/2 Ω X2/3 18–25 Ω

2 Turn ignition off.

Pull plug X1.

X2/3 Ω X1/15 Resistance infinite

3 – X2/2 Ω X1/15 Resistance infinite

Fault code


Detection time

Remedy Test step

Requirement /Action



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25 Proportional valve fault 3: Controller defective


27 Proportional valve fault 5: Controller defective


28 Terminal 30 Undervolt-age

serious 60 s Check lead, plug and fuse.



Switch on ignition.

X1/13 V X1/15 ≥ 17.5 V

29 Fault in controller serious approx. 0.2 s Replace controller. – – – –

31 Controller: coding incor-rect

serious approx. 0.1 s Code controller proper-ly.

– – – –

32 Retarder pilot light: Inter-ruption or short-circuit to ground

serious 1 s Check lead, retarder pi-lot light and fuse.



Switch on ignition.

X3/8 V X1/15 ≥ 17.5 V

Fault code


Detection time

Remedy Test step

Requirement /Action



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33 Retarder pilot light: short-circuit to battery

serious 3 s Check lead and retarder pilot light.

– Ignition switched on


X3/8 V X1/15 ≤ 2 V

35 Fault in controller serious max. 9 min. Replace controller. – – – –

37 Fault in pedal operation slight 1 s Check system according to specifications of OEM or VOITH.

– – – –

38 Constant-air pressure fault

slight max. 10 s Check the pressure sen-sor cable harness.

In case of deviation: Test Step 2.



X3/7 V X1/15

and

X3/10 V X1/15

0.3–0.7 V

4.75–5.25 V

Troubleshoot in cable harness, pressure sen-sor, proportional valve, supply air, ECU (contact Voith).

2 – – –

Fault code


Detection time

Remedy Test step

Requirement /Action


Constant-Air Pressure (py)Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.6 Constant-Air Pressure (py)



7000 Pressure sensor

99/30 Retarder tester

99/31 Cable 1 (to the proportional valve)

99/32 Cable 2 (to the pressure sensor)

99/33 Cable 3 (to temperature sensors)

99/34 Cable 4 (to the vehicle voltage supply/PC interface)

The constant-air pressure py measurement pro-vides information on

• internal and external leaks

• proper functioning

• proper control of the retarder

32091

7000

5000

99/32

99/34

99/30

99/31

99/33

NOTE


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Requirements




• Supply-air pressure in auxiliary circuit: 8–11 bar



• Electrical connections of the retarder are com-pletely disconnected from the vehicle.

Test scope

1. Connect the retarder tester (99/30) (see Test set-up diagram Page 61 and operating instructions of the retarder tester):

- Connect cable 1 (99/31) to proportional valve (5000).

- Connect cable 2 (99/32) to pressure sensor (7000).

- Connect cable 3 (99/33) to oil temperature sen-sor (8000) and coolant sensor (20600).

- Connect cable 4 (99/34) to the vehicle voltage supply/PC interface.

2. Select the retarder type at the retarder tester.

3. Check constant-air pressure (see operating instructions of retarder tester).

4. Compare measured values (see operating instruc-tions of retarder tester).

Special tools

Retarder tester in a case compl.

Test softwareDiana-Lite

Air pressure gauge

0–6 bar

99/29 99/40 99/7

comprising:99/30–99/35

50/35 a. 50/36

With the test software "Diana-Lite" (99/40), meas-ured values can be read out and stored comfortably via the PC in addition to the tests with the retarder tester.The stored measured values can be transmitted to the Voith customer service for evaluation (see op-erating instructions on CD-ROM).

153.001085xx 153.000776xx H53.1403xx

NOTE

Hot parts!


Work carefully.


CAUTION


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5. Disconnect the retarder tester (99/30) and all cables.

6. Restore connections between vehicle electronics and retarder.

If the measured constant-air pressure value (py) is below the required setpoint, either the retarder is leaking or the control system is defective (see trou-bleshooting diagram Page 29).

NOTE

Pump Pressure (pdyn)Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.7 Pump Pressure (pdyn)




50/36 Pressure sensor: 0–30 bar

99/30 Retarder tester

99/31 Cable 1 (to the proportional valve)

99/32 Cable 2 (to the pressure sensor)

99/33 Cable 3 (to temperature sensors)

99/34 Cable 4 (to the vehicle voltage supply/PC interface)

Checking the pump pressure pdyn provides infor-mation on

• the mechanical status of the rotor parts

• internal leaks

• proper functioning of the retarder

32092

5000100

99/32

99/34

99/30

99/31

99/33

50/36

NOTE


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Requirements






• Electrical connections of the retarder are com-pletely disconnected from the vehicle.

• No external leaks detected at retarder

• Vehicle secured

• Prop shaft at the retarder removed from the flang-es (see specifications of vehicle manufacturer)

Test scopeSpecial tools

Pressure sensor0–30 bar

Retarder testerin case compl.

Test softwareDiana-Lite

50/36 99/29 comprising:99/30–99/35

50/35 a. 50/36

99/40

With the test software "Diana-Lite" (99/40), meas-ured values can be read out and stored comfortably via the PC in addition to the tests with the retarder tester.The stored measured values can be transmitted to the Voith customer service for evaluation (see op-erating instructions on CD-ROM).

--- 153.001085xx 153.000776xx

NOTE

Hot parts and oil!

Hands can be burned and scalded.

Work carefully.


Due to construction, a small amount of oil may leak out; this does, however, not affect retarder opera-tion.

CAUTION

NOTE


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1. Unscrew screw plug (1500) and remove sealing ring (1400).

2. Connect pressure sensor (50/36) to retarder hous-ing (100) with sealing ring (1400).

3. Connect the retarder tester (99/30) (see Test set-up diagram Page 64 and operating instructions of the retarder tester):

- Connect cable 1 (99/31) to proportional valve (5000).

- Connect cable 2 (99/32) to pressure sensor (50/36).

- Connect cable 3 (99/33) to oil temperature sen-sor (8000) and coolant (20600).

- Connect cable 4 (99/34) to the vehicle voltage supply/PC interface.

4. Select the retarder type at the retarder tester.


6. Drive the vehicle with a prop shaft speed of nps = 1,000 r.p.m..

7. Check pump pressure (see operating instructions of retarder tester).

8. Compare measured values (see operating instruc-tions of retarder tester).

9. Disconnect the retarder tester (99/30) and all cables.

10.Disconnect the pressure sensor (50/36) and remove the sealing ring (1400).

11.Lubricate the new sealing ring (1400) with sili-cone-free, non-corrosive grease.

12.Screw in the screw plug (1500) with the sealing ring (1400).

13.Tighten the screw plug (1500) to 25 Nm.

14.Remove prop shaft at the retarder from the flanges (see specifications of vehicle manufacturer).

32078

1500

1400

32093

100

50/361400

Shift in direct gear (ratio 1:1). The engine speed 1,000 min-1 then corresponds to the prop shaft speed of 1,000 r.p.m.

NOTE

If the setpoint of the constant-air pressure (py) is reached, but the pump pressure (pdyn) is under-shot, the retarder has an internal defect.

Check rotor parts.

NOTE

Proportional Valve CurrentVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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5.8 Proportional Valve Current Requirements





• Fuse for retarder controller tested and in order

• Male and female plug connectors at proportional valve checked for damage or wear (notch scratch-es).

• Electrical lead and plug connections checked (vis-ual inspection) and in order

Test scope

1. Disconnect the plug from the proportional valve (21) and connect it to the measuring adapter (99/3).

2. Connect the plug of the measuring adapter to the proportional valve (21).

3. Connect the multimeter (98/8). Measuring type: mA.

4. Turn the "Propventil" (prop valve) switch at the measuring adapter to position "I".


6. Shift the retarder to the highest gear.

Special tools

Measuring adapter

99/3




---

NOTE

32059

98/8

99/3

21

Proportional Valve CurrentVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Diagnosis and Troubleshooting

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7. Read measured value and compare to the speci-fied values:

8. Disconnect multimeter.

9. Pull the plug from the measuring adapter (99/3) and connect it to the proportional valve (21).

Due to continuous readjustment in the control loop, the measured values may not be constant, but are within the specified range.

Controller Item number/Code number

Measured value

Digiprop 117/153.000863xx 440–640 mA

118/153.000967xx

119/153.000976xx

120/153.000999xx

VERATM 153.000107xx 440–640 mA

NOTE

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Removing and Installing the Retarder

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6. Removing and Installing the Retarder

Retarder can fall!

Your body can be crushed severely.

Secure retarder against falling.

Use a suitabe device for hanging it up.

Improper removal/installation!


Warranty is voided.

Request and use gearbox-specific documents

and special tools from VOITH.

DANGER

CAUTION

Hot parts!


Work carefully.


CAUTION

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7. Repair

7.1 Components Overview 71

7.2 Top Cover 75

7.3 Casing Ventilation 77

7.4 Retarder Ventilation 81

7.5 Non-Return Valve 82

7.6 Heat Exchanger 84

7.7 Water Neck 87

7.8 Oil Temperature Sensor 89

7.9 Coolant Temperature Sensor 91

7.10 Pressure Sensor 93

7.11 Proportional Valve and Damping Plate 96

Components OverviewVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.1 Components Overview



1000 O-ring 158.34x3.53, replace


1500 Screw plug M14x1.5,hexagon socket head, w.a.f. 6, 25 Nm



1900 Non-return valve M48x1.5,hexagon insert bit, w.a.f. 55, 280 Nm




2300 Casing ventilation

2301 O-ring 55x3, replace

2800 Oil filler plug M30x1.5,hexagon socket head, w.a.f. 17, 130 Nm


3300

3400

3500 3200

7000

8000 6100

100

5000

5400

5200 5200

5300 5100

3000

2300

3600

2800 2900

32012

6150 2000 3600

6000

6150 6300

6100

1000 2100

6200

4800

4800 1600

1700

1500 1400

1400

20600

20500

20500

20400

20400

20200 20300

20000

20100

1900 1500

20700

8100 2301

6150

6150 1950

4703 4702

NOTE


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3000 Top cover

3200 Sealing top cover, replace

3300 Disc silencer

3400 Corrugated spring

3500 Circlip JL30x1.2

3600 Hex head screw M8x45,hexagon insert bit, w.a.f. 13,Initial torque: 17 Nm,Final torque: 30 Nm


4703 Screw plug M8x1, hexagon socket head, w.a.f. 5, 10 Nm



5100 Damping plate



3300

3400

3500 3200

7000

8000 6100

100

5000

5400

5200 5200

5300 5100

3000

2300

3600

2800 2900

32012

6150 2000 3600

6000

6150 6300

6100

1000 2100

6200

4800

4800 1600

1700

1500 1400

1400

20600

20500

20500

20400

20400

20200 20300

20000

20100

1900 1500

20700

8100 2301

6150

6150 1950

4703 4702

NOTE


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5300 Hex head screw M8x20, replacehexagon insert bit, w.a.f. 13, 30 Nm

5400 Hex head nut M8, replacehexagon insert bit, w.a.f. 13, 18 Nm

6000 Heat exchanger

6100 O-ring 25x2.5 (brown), replace

6150 O-ring 25x2.5 (black), replace

6200 Hex head screw with flange M10x40,hexagon insert bit, w.a.f. 15, 46 Nm

6300 Hex head screw with flange M10x70,hexagon insert bit, w.a.f. 15, 46 Nm

7000 Pressure sensor M16x1.5,hexagon insert bit, w.a.f. 27, 30 Nm

8000 Oil temperature sensor M14x1.5,hexagon insert bit, w.a.f. 27, 28 Nm



3300

3400

3500 3200

7000

8000 6100

100

5000

5400

5200 5200

5300 5100

3000

2300

3600

2800 2900

32012

6150 2000 3600

6000

6150 6300

6100

1000 2100

6200

4800

4800 1600

1700

1500 1400

1400

20600

20500

20500

20400

20400

20200 20300

20000

20100

1900 1500

20700

8100 2301

6150

6150 1950

4703 4702

NOTE


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20400 Hex head screw M8x45,hexagon insert bit, w.a.f. 13,30 Nm


20600 Coolant temperature sensor M14x1.5,hexagon insert bit, w.a.f. 27,28 Nm



3300

3400

3500 3200

7000

8000 6100

100

5000

5400

5200 5200

5300 5100

3000

2300

3600

2800 2900

32012

6150 2000 3600

6000

6150 6300

6100

1000 2100

6200

4800

4800 1600

1700

1500 1400

1400

20600

20500

20500

20400

20400

20200 20300

20000

20100

1900 1500

20700

8100 2301

6150

6150 1950

4703 4702

NOTE

Top CoverVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.2 Top Cover

Requirements





3000 Top cover

3200 Sealing top cover, replace


32013

100

3200

3000 3600

Top CoverVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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Removal

1. Unscrew the hex head screw (3600).

2. Remove the cover (3000).

Checking

1. Check the holes in the cover (3000) for accessibil-ity with compressed air.

Installation

1. Insert new seal (3200).

2. Screw on cover (3000) with the hex head screws (3600).

3. Tighten hex head screws (3600) in the sequence 1 to 13 (see diagram) with an initial torque of 17 Nm.

4. Tighten hex head screws in the same sequence with a final torque of 30 Nm.

Hot parts!


Work carefully.


CAUTIONIncorrect sequence when tightening the hex

head screws!

Cover can buckle.

Tighten hex head screws in the prescribed se-

quence.

CAUTION

12

3

4

56

78

9101112

13

32014

Casing VentilationVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.3 Casing Ventilation


2300 Casing ventilation


2300/1 Valve insert

2300/2 Float, specified weight max. 12 g, clean

2300/3 Float cage


Cleaning agent

Float Methylated spirit

32015

2300/1

23012300

2300/2

2300/3

NOTE


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The test ring (99/4) can be ordered from Voith Turbo GmbH & Co. KG: Item number H67.2757xx.

Requirements



• Top cover removed and checked (see page 75)

Removal

1. Knock valve insert (2300/1) with the impact puller (99/5) and the adapter (98/9) upward from the retarder housing.

Use only the adapter (98/9) as from item number H53.942811.

Special tools

Impact puller Adapter

99/5 98/9

NOTE

H53.7712xx H53.9428xx

Tools for self-fabrication

Test ring

99/4

Material: St 37

Weight: 0.085 kg

Ø 40.5 mm

7 m

m Ø 60 mm

32016e

Material: St 37Weight: 0.085 kg

Hot parts!


Work carefully.


CAUTION

32017

99/5

98/9

2300/1


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2. Float (2300/2) and float cage (2300/3) are to be removed from retarder housing.

3. Take O-ring (2301) out of the groove in the valve insert (2300/1).

Checking

1. Check the casing ventilation (2300) for dirt/sludge and clean it.

2. Check the float (2300/2) for damaged surfaces and sealing areas (arrow).

3. Weight float (2300/2): Specified weight: max. 12 g.

4. For exceeded specified weight: replace the entire casing ventilation (2300).

5. Check the sealing edge of the radial shaft sealing ring (arrow) in the valve insert (2300/1):

- For this purpose, place the float (2300/2) on a suitable object (e.g. hex head nut).

- Place the valve insert (2300/1) on the float (2300/2) and weigh it down using the test ring (99/4).

- Fill empty space between float (2300/2) and up-per edge of valve insert with methylated spirit.

If the sealing edge is undamaged, the fluid level re-mains constant over 1 minute.

32018

2300/3

2300/2

2300/1

2301

32019

2300/2

32020

2300/2

2300/1

99/4

32021


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6. Replace casing ventilation (2300) if sealing edge is damaged.

Installation

1. Apply silicone-free and non-corrosive grease to a new O-ring (2301) and pull it on the valve insert (2300/1).

2. Clean float with methylated spirit.

3. Insert float (2300/2) into the float cage (2300/3).

4. Place valve insert (2300/1) on float cage (2300/3).

5. Coat bore of casing ventilation in the retarder housing with silicone-free and non-corrosive grease.

6. Press valve insert (2300/1) carefully into the retarder housing with the impact puller (99/5) and the adapter (98/9).

7. Assemble retarder.

Changing the radial shaft sealing ring leads to mal-functions of the retarder.

If the radial shaft sealing ring is damaged: re-place the entire casing ventilation (2300).

Do not replace the radial shaft sealing ring.

Lubricating the radial shaft sealing ring leads to malfunctions of the retarder.

Do not lubricate the radial shaft sealing ring.

NOTE

NOTE

2300/1

2301

32022

2300/1

2300/2

2300/3

32023

32024

99/5

98/9

2300/1

Retarder VentilationVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.4 Retarder Ventilation

Requirements




3300 Check, clean and blow out disc silenc-er with compressed air

3400 Corrugated spring

3500 Circlip

Cleaning agent

Retarder ventilation Benzine

Heavily soiled or painted-over retarder ventila-

tion!

Retarder reduces braking power after a delay.

Replace retarder ventilation.

Replace retarder ventilation in case of mechan-ical damage.

32025

3400

3300

3500

DANGER

NOTE

Non-Return ValveVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.5 Non-Return Valve


1900 Non-return valve

1900/1 Guide M48x1.5,hexagon insert bit, w.a.f. 55,280 Nm

1900/2 Spring

1900/3 Check spool for damage and soiling and replace entire non-return valve if necessary.



32027

1900

1900/3

1900/1

1900/2

1950

NOTE

Non-Return ValveVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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Requirements



• Oil drained (see page 22)

Hot parts!


Work carefully.


CAUTION

Heat ExchangerVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.6 Heat Exchanger







6000 Heat exchanger

6100 O-ring 25x2.5 (brown), replace

6150 O-ring 25x2.5 (black), replace

6200 Hex head screw M10x40, hexagon insert bit, w.a.f. 15, 46 Nm

6300 Hex head screw M10x70,hexagon insert bit, w.a.f. 15, 46 Nm


32028

6150

6150 1000 2100

6000

2000 6200

3600

6300

4800

4800

6100

6100

NOTE


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Requirements



• Supply-air pressure discharged

• Oil drained (see page 22)

• Coolant drained (see page 25)

Removal

1. Unscrew hex head screws (3600, 4800, 6200 and 6300).

2. Remove the cover (2000).

3. Remove heat exchanger (6000).

Checking

1. Attach pressure test equipment (50/22) to heat exchanger (6000) with O-rings and attach the compressed-air line to the connection.

2. Place heat exchanger (6000) with pressure test equipment (50/22) in a water bath (approx. 40 °C).

3. Slowly pressurise heat exchanger (6000) with compressed air from 0 to max. 10 bar.

4. If air bubbles appear in the water, replace the heat exchanger.

Special tools

Pressure test equipment

50/22

153.000769xx

Hot parts!


Work carefully.


CAUTION

32094

6000

50/22


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Installation

1. Apply silicone-free and non-corrosive grease to the new O-rings (6100) and (6150) and pull them on the heat exchanger (6000).

2. Lubricate the new O-ring (1000) with silicone-free, non-corrosive grease and pull it on.

3. Fit in heat exchanger (6000).

4. Lubricate the new O-ring (2100) with silicone-free, non-corrosive grease and pull it on.

5. Screw on cover (2000) with the hex head screws (3600, 4800).

6. Tighten hex head screws (3600, 4800) in the pre-scribed sequence 1 to 7 (see diagram) with an ini-tial torque of 17 Nm.

7. Tighten hex head screws (3600, 4800) in the same sequence to a final torque of 30 Nm.

8. Screw in hex head screws (6200 and 6300) and tighten to 46 Nm.

9. Fill in the oil (see “Oil Change” on page 21).

Ensure that the brown O-rings (6100) and the black O-rings (6150) are not inadvertently swapped.

32095

6150

6150 1000

6000

6100

6100

NOTE

When inserting the heat exchanger (6000), en-sure correct installation position (see arrow in the diagram).

Ensure that the sealing surfaces are not dam-aged.

NOTE

32064

1

2

3

45

6

7

6200

2000

48004800

6300

4800 4800

4800

36003600

Incorrect sequence when tightening the hex

head screws!

Cover can buckle.

Screw tight hex head screws in the prescribed se-

quence.

CAUTION

Water NeckVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.7 Water Neck






20400 Hex head screw M8x45,hexagon insert bit, w.a.f. 13, 30 Nm


20600 Coolant temperature sensor M14x1.5, hexagon insert bit, w.a.f. 27, 28 Nm



32029 20400

20400

20300

20400

20400

20000

20500

20500

2010020600

20200

Kd.-Sach-Nr.

Voith-Sach-Nr.

TYP R 123

FABR.Nr.

Baujahr

iRET = 1.00

20700

NOTE

Water NeckVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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Requirements




Hot parts!


Work carefully.


CAUTION

Oil Temperature SensorVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.8 Oil Temperature Sensor

Requirements




8000 Temperature sensor M14x1.5,hexagon insert bit, w.a.f. 27, 28 Nm



Hot parts!


Work carefully.


32032

8000 Kd.-Sach-Nr.

Voith-Sach-Nr.

TYP R 123

FABR.Nr.

Baujahr

iRET = 1.00

8100

NOTE

CAUTION

Oil Temperature SensorVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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Measuring in one temperature range is usually suf-ficient.

Temperature Resistance

20 °C ± 10 °C 1,039–1,117 Ω

60 °C ± 10 °C 1,194–1,271 Ω

80 °C ± 10 °C 1,271–1,347 Ω

NOTE

Coolant Temperature SensorVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.9 Coolant Temperature Sensor

Requirements





20600 Temperature sensor M14x1.5,hexagon insert bit, w.a.f. 27, 28 Nm



Hot parts!


Work carefully.


32033

20600

Kd.-Sach-Nr.

Voith-Sach-Nr.

TYP R 123

FABR.Nr.

Baujahr

iRET = 1.00

20700

NOTE

CAUTION

Coolant Temperature SensorVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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Observe the specifications of the vehicle manu-facturer on coolant quality or those of Voith Tur-bo cooling water quality list.

Measuring in one temperature range is usually suf-ficient.

Temperature Resistance

20 °C ± 10 °C 1,039–1,117 Ω

60 °C ± 10 °C 1,194–1,271 Ω

80 °C ± 10 °C 1,271–1,347 Ω

NOTE

NOTE

Pressure SensorVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.10 Pressure Sensor


7000 Pressure sensor M16x1.5 with integrat-ed FPM sealing ring, hexagon insert bit, w.a.f. 27, 30 Nm

Lubricate FPM sealing ring on both sides with silicone-free, non-corrosive grease before in-stallation.

Special tools

Measuring adapter

99/3

32031

7000

NOTE

H53.8198xx


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Requirements



• Constant-air pressure gauge connected

• Electrical leads and plug connections checked (visual inspection) and in order

Test scope

1. Pull plug from pressure sensor (38).

2. Connect the plug of the measuring adapter (99/3) to the pressure sensor (38).

3. Connect the ground lead of the multimeter (98/8) to test socket 4 (ground) of the measuring adapter.

4. Turn the "Propventil" (prop valve) switch at the measuring adapter (99/3) to position "Propventil" (prop valve).


6. Connect the positive lead of the multimeter (98/8) to test socket 1 (positive) of the measuring adapter.

7. Measure voltage: setpoint 4.75–5.25 V.

8. Connect the positive lead of the multimeter (98/8) to test socket 2 (positive).

9. Measure voltage.




Hot parts!


Work carefully.


NOTE

CAUTION

32060

98/8

99/3

38

In case of a fault (cable or sensor), the controller switches of the supply voltage.

Check cable or sensor and replace if necessary.

NOTE


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10.Compare measured values of constant-air pres-sure against the values (see diagram).

11.Turn ignition off.

12.Disconnect measuring adapter (99/3).

13.Connect electrical connection to pressure sensor.

Voltage measurement at pressure sensor

32062_e

0

1

2

3

4

5

0.5

1.5

2.5

3.5

4.5

00.5 1 1.5 2 2.5 3 3.5 4

[ BAR ]

[ V ]

Proportional Valve and Damping PlateVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Repair

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7.11 Proportional Valve and Damping Plate



5100 Damping plate, replace if damaged


5300 Hex head screw M8x20, replacehexagon insert bit, w.a.f. 13, 30 Nm

5400 Hex head nut M8, replacehexagon insert bit, w.a.f. 13, 18 Nm


For vehicles used in city traffic: Replace propor-tional valve at intervals of 120,000 km.

32030

5200 5200 5000 5400

5300

5100

5400

NOTE

NOTE

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Requirements



• Supply-air pressure discharged

• Compressed-air line disconnected

• Electrical connection lead disconnected from pro-portional valve. Male and female connector checked for damage or wear (notch scratches)

Check damping plate (5100) for mechanical and aging damage and replace if necessary.

NOTE

Voith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Appendix

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8. Appendix

8.1 Tightening Torques 99

Tightening TorquesVoith Turbo I Aftersales Service Manual Voith Retarder VR 123 I Appendix

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8.1 Tightening Torques

Item No. Designation Dimensions Tightening torque

1500 Screw plug M14x1.5, hexagon socket head, w.a.f. 6 25 Nm

1700 Oil drain plug M24x1.5, hexagon socket head, w.a.f. 12 80 Nm

1900 Non-return valve outlet M48x1.5, hexagon insert bit, w.a.f. 55 280 Nm

2800 Oil filler plug M30x1.5, hexagon socket head, w.a.f. 17 130 Nm

3600 Hex head screw M8x45, hexagon insert bit, w.a.f. 13 Observe tightening sequence:

Initial torque: 17 Nm

Final torque: 30 Nm

4703 Screw plug M8x1, hexagon socket head, w.a.f. 5 10 Nm

4800 Hex head screw M8x70, hexagon insert bit, w.a.f. 13 Observe tightening sequence:

Initial torque: 17 Nm

Final torque: 30 Nm

5300 Hex head screw M8x20, hexagon insert bit, w.a.f. 13 30 Nm

5400 Hex head nut M8, hexagon insert bit, w.a.f. 13 18 Nm

6200 Hex head screw with flange M10x40, hexagon insert bit, w.a.f. 15 46 Nm


7000 Pressure sensor M16x1.5, hexagon insert bit, w.a.f. 27 30 Nm

8000 Oil temperature sensor M14x1.5, hexagon insert bit, w.a.f. 27 28 Nm

20200 Screw plug M14x1.5, hexagon socket head, w.a.f. 6 25 Nm


20600 Coolant temperature sensor M14x1.5, hexagon insert bit, w.a.f. 27 28 Nm

Voith Turbo Produktgruppe Retarder

Postfach 1555 74555 Crailsheim Deutschland

Phone: 00 49 79 51 / 32-0 Fax: 00 49 79 51 / 32-756 [email protected] www.voith.com

Engineered reliability.