~~.~JOHN DE~E~R.tEIJ

7628 SCRAPER

Model shown may include options

ENGINE PERFORMANCE

Nm lib-it

814 I 600

120190

hp kW

180 134a:w

1601119 ~"-

I-140 1104 ~

w5 746 1 550a:f2ti; 678 1500z

610 1 450

Uh Igal/h FUEL CONSUMPTIONFULL LOAD38

..J 30w:;) 22.5LL

157.5

108

6

42

,'r,-~:m;:'f"i$("m

TYPICAL'

900 1700 21001300

ENGINE SPEED-RPM

'Depending on operating variables

86

FEATURES

180 SAE net hp (134 kW)turbocharged andintercooled John Deere diesel engine

11cu. yd. (8.4 m3)heaped capacity self-loading bowl with hydraulic load ejection

Infinitely variable-speed hydrostatic elevatorwith 18 extra-strong flights fills loads faster

Twotransmission control options: directoperator (manual) control of shifting, or fullyautomatic (microprocessor-based) controls

Closed-center hydraulic system with fuel-saving variable-displacement pump

Hydraulic differential lock improves tractionand reduces wheel spin-can be engaged!disengaged on the go

Improved position-responsive power steeringand heavy-duty power brakes

New direct-acting bowl and elevator controlsprovide precise cutting depth control

New dual-level monitor system providesImproved machine protection

Roll-over protective structure (ROPS) and seatbelt with cab or canopy

Standard tractor and scraper fenders

I

7628 SCRAPER SPECIFICATIONS

- --~ .-- ---

Specificationsand design are subject to change without notice. Wherever applicable, specifications are in accordance with SAE Standards. Except where otherwise noted, thesespecifications are based on a unit with 23.5-25, 16 PR tires, ROPS canopy, full fuel tank, 175-lb. (80 kg) operator and standard equipment.

Capacity (SAE heaped):Volume 11cu.yd.(8.4m3)Total weight of payload,

2500 le/yd3 (1483 kg/m 3) . . . . . . . . . . . . . 27,500 lb. (12474 kg)

Rated Power @ 2100 rpm: SAE DIN 70 020Net 180hp(134kW) 134kWGross 190hp(142kW)Net engine power is with standard equipment including air cleaner, exhaust system,alternator, and cooling fan, at standard conditions per SAE J1349 and DIN 70 020, usingNo.2-D fuel @ 35 API gravity. No derating is required up to 10,000 feet (3050 m) altitude.Gross power is without cooling fan.

Engine: John Deere 6-466AType. . . . . . . 4-stroke cycle, turbocharged and intercooled dieselBore and stroke. . . . . . . . . . . . . . . 4.56 x 4.75 in. (116x 121 mm)No. of cylinders 6Displacement 466cu.in.(7.638L)Compressionratio 14.9t01Maximumnet torque @ 1400 rpm . 585 Ib-ft(793 Nm)(80.9 kg-m)Lubrication. . . . . . . . . . . . . . . . . Pressure system w/full-flowfilterAspirated air cleaner w/safety elementandrestrictionindicator DryCoolingfan SuctiontypeElectri.calsystem. . . . . . . . . . . . . . . . . 24-voltw/5Q-a!TIPalternatorBattene~two 12-volt) Reserve capacity. 180 minutesTorque Converter:Two-phasesingle-stage with2.3 to 1 multiplicationratio,free-wheel-ing stator, and lock-up clutch. Lock-up is operator controlled withdirect-acting shift system, or automatic with optional automatictransmission control.

Transmission:John Deere planetary powershift with torque converter; 6 speedsforward, 1 reverse.Shift controloptions:

Direct-acting(manual) ... Shift lever actuates 24-voltsolenoidsFullyautomatic Microprocessor actuates 12-voltsolenoids

Lubricationand shift-elementactuation. . 24 gpm (90 Umin) gearpumpTravelSpeeds (Maximumat 2100 engine rpm)Forward mph (km/h) Reverse mph

Gear Gear1 3.0 4.8 1 5.02 4.3 6.93 5.4 8.74 7.8 12.65 15.5 24.96 28.3 45.5

Differential Lock. . . . . . . . Foot-operated, hydraulicallyactuated

(km/h)

8.0

Drive Axle: Differential type with inboard planetariesReduction ratio 28.94t01Lubrication and differential lock actuation. . . 4.7 gpm (18 Umin)gear pump

Power Steering: Position-responsive typeArticulated frame hydraulically actuatei1 by dual cylindersTurning circle (180 deg. turn) 30 ft. (9.14 m)Framearticulation(total) 180deg.

Brakes: Hydraulic, power actuated. (Hydraulic accumulator pro-vides dead-engine braking)Tractor. . . . . . . . . . . . . . . . . . . . Adjustment-free inboard wet-diskScraper. . . . . . . . . Self-adjusting wheel-mounted expanding-shoeParking. . . . . . . . . . . Foot-actuated (mechanical) expanding-shoe

TractorOsciliation(total) .27deg.

Hydraulic Systems:Main tractor: Closed-center system with 4.0 in3 (65 cm3) variable-displacement, constant-pressure pump for steering, brakes, and allscraper functions except elevator drive.

System pressure. . . . . . . . 2350 psi (16 203 kPa) (165.2 kg/cm')Main pump rating. . . 34.6 gpm (131 Umin) at 2100 engine rpmCharge pump rating. . . 13 gpm (49 Umin) at 2100 engine rpm

Elevator drive: Hydrostatic system with 4.26 in3(69.8 cm3) variable-displacement, axial-piston pump, and 3.15 in3 (51.6 cm3) axial pis-ton motor.

System pressure. . . . . . . . . 5000 psi (34475 kPa) (351 kg/cm')Pump rating. . . . . . . 36:6 gpm (139 Umin) at 2100 engine rpm

Filtration. . . . . . All systemsare protectedby replaceable filters.Mainhydraulicsystem 10micronElevatorsystem 10micronTransmission 10micronEngine 25micronDifferential 10micron

Hydraulic Cylinders: Bore StrokeLift (2) 4.5 in. (114 mm) 18 in. (457 mm)Sliding floor (1) 5.25 in. (133 mm) 30.1 in. (765 mm)Ejector gate (2) 2.5 in. (64 mm) 34.8 in. (884 mm)Steering (2) 3.5 in. (89 mm) 25.89 in. (658 mm)Piston rods. . . . . . Ground, heat-treated, chrome-plated, polished

Lift andsteeringcylinders. . . . . . . . . . . . . . . . . . . 2 in. (51 mm)Sliding floor cylinders 2.25in.(57mm)Ejector gate cylinders 1.50in.(38mm)

Elevator. Reversible, hydrostatic-drive with triple gear reduction.Non-sealed elevator chain is standard. Sealed chain is optional forextended life.Numberofflights 18Spacing of flights 12.44in.(316mm)Widthofflights 5ft.6.9in.(1.7m)Speed (infinitely variable) forward. . . . . 0 to 236 fpm (0-72m/min)

reverse. . . . . . . 0-118fpm (0-40 m/min)Length (top to bottom) 9ft.6in.(2.9m)

Bowl. . . . . . Heavy-gauge steel with reinforced box construction.Sliding floor rides on heat-treated replaceable rails. Cutting edgeretracts witli sliding floor. Independent axles are vertically adjusta-ble.

Cutting Edge. . . . . . . . . . . . . 7 ft. 6 in. (2.29 m) wide; 3 sections,reversible and replaceable, high-carbon steel. Each section isadjustable vertically 2 in. (51 rom).Center section. . . . . . . . . 0.75 x 10 x 54 in. (19 x 254 x 1372 mm)End sections. . . . . . . . . . . 0.75 x 10 x 18 in. (19 x 254 x 457 mm)

Tires Available:23.5-25, steel-cord radial23.5-25, 16 PR, E2

Capacities: U.S.Cooling system 9gal.Fuel tank 72gal.Engine lubrication w/filter .. . . . . . . . . . . . . . . . . 24 ql.Transmissionw/filter 13gal.Differential case w/filter

and hoses 23ql.Hyd. system w/hyd. filter and

elevator filter 12gal.Elevatorgearcase 13ql.

Liters34.1

272.522.749.0

21.8

45.412.6

Additional Standard Equipment:Deluxe suspension seat Transmissionoil temperatureDual-level monitor system highTwo-levelwarning: Electric hourmeter

Engine coolant temperature Fenders (tractor and scraper)Single-level warnings: Fuel gauge

Axle filter restricted HornBrake system pressure low Lights (front driving and rear stop)Electrical system voltage low Lubrication banks (hitch, steeringElevator charge pressure low and bowl)Engine air filter restricted Manual transmission controlsEngine oil pressure low Reverse warning alarmHydraulic system filter RapS canopy and seat belt

restricted Side cutters (regular)Parking brake on (in gear) TachometerTransmission filter restricted Tilt/telescope steering wheelTransmission oil pressure low Turn signals and 4-way flasher

Windshield and front wiper

Weight Distribution:Empty: Driveaxle ..................

Scraper axle ................Total .

Loaded: Driveaxle ..................Scraper axle ................Total. .. .. .. .. . .. . .. .. .. .. .

lb.22,79012,710

35,50032,08330,91763,000

kg103375765

16 10214 5531402428577

II

I~

Optional or Special Equipment:Air conditionerAutomatic transmission control systemCab door and panelsEjector gate spill screenEther starting aidExtended side cutters

Fender extensions and mud flaps for scraper wheelsHeater, 20,000 Btu/hr (5.9 kW)Rear push blockRearview mirrors (left and right)Steps and handrails, rear tractorTeeth for cutting edgeWork lights (2 front and 2 loading)

87

762B SCRAPER VEHICLE PERFORMANCE

30-r300

20

10

C;::.~ 5J-50.c;; 4...J-4000~ 3...J-30..J..J=>

~ 2..1-20a:

.5-Ckg N

- - - - - - - - - - CONVERTER DRIVEDIRECT DRIVE

VEHICLE WEIGHTx1000 lb. (kg)

5 kg~

10 LB

40

~80 90

30

L,70

20r

40

101 1

100T

50T

60T

30T

20

200

70

6050

40

2

30 LOADEDUNITWEIGHT2500 Ib/yd3(1483 kg/m3)MATERIAL I I

25

2010020

10

15~f

10 ~z

8 ~~

6 ~w.[J~

4 bf-

4th Gear

16 20 24 288 12

t20

TRAVEL SPEEDS

t30

t40

I45

t10

GRADABI LlTY -RI MPU LL

To calculate gradability performance: Read down from vehicle weight to the percent of total resistance. (Total resistance equals actualpercent of grade plus one percent for each 20 Ib./ton of rolling resistance.) From this weight-resistance point, read straight across to the curvewith the highest obtainable speed range, then down to maximum speed. Usable rimpull is affected by traction available and weight on drivewheels.

*Ambient temperature, length of haul and weight of material moved could affect the tire ton-mph capacity. To prevent premature tire failure underadverse working conditions, consult the tire manufacturer.

88

]

10-9-8-7.61-

5.

4.

3

2 .II,

1\I

1LB b MPH 4

1 i<m/h

[7628 SCRAPER DIMENSIONS

5 ft. 11.72 in. (1.82 m)19 ft. 8.24 in. (6 m)

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AA**

E*: cut below ground level: 11.0in (279 mm) wlo teeth12.8 in. (324 mm) wlteeth

A* *: add 4.5 in. (114mm) lor optional rear push block

89

BOWL ATGROUND LEVEL BOWL UP BOWL LEVEL

A 32 ft. 9.5 in. 32 ft. 2.5 in. 32 ft. 5.4 in.(10 m) (9.81 m) (9.9m)

B 21 ft. 0.25 in. 20 It. 4.1 in. 20 ft. 7 in.(6.40 m) (6.20 m) (6.25 m)

C 12 It. 11.5in. 13 It. 12 It. 11.9 in.(3.95 m) (3.96 m) (3.96 m)

D 18.5 in. 18.5 in. 18.5 in.(axle clearance) (470 mm) (470 mm) (470 mm)

E - 17.25 in. (438 mm) wlo teeth 12 in. (305 mm) wlo teeth15.50 in. (394 mm) wlteeth 10 in. (254 mm) wlteeth

F 9 It. 10 in. 9 It. 4 in. 9 ft. 6.4 in.(3m) (2.84 m) (2.90 m)

G 8 It. 7 in. 9 It. 6 in. 9 It. 2 in.(2.62 m) (2.89m) (2.79 m)

H 17.12 in. 21.9 in. 20 in.(trans. clearance) (435 mm) (556 mm) (508 mm)