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1Malaga 

3408/12 & 3126 B H E U I

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2Malaga 

Components High pressurehydraulic pump 

E C M 

Throttlecontrol 

Speed/timingsensor 

Injector Pressuresensor 

Temperaturesensor 

3408/12 H E U I

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3Malaga 

Oil flow 

IAPsensor 

3408/12 H E U I

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4Malaga 

HEUI System 

3408/12 H E U I

TO LUBESYSTEM

FUEL

TRANSFER

PUMP

PUMP

CONTROL

VALVE

OIL

FILTER

OIL

COOLER

HEUI

HEUI

OIL

SUMP

HYDRAULIC

PRESSURE

SENSOR

HYDRAULIC

TEMPERATURE

SENSOR

OIL PRESSURE

SENSOR

ECM

COOL DOWN

CIRCUIT

FUEL TANK

FUEL

TEMPERATURE

SENSOR

PRESSURE

REGULATING

VALVE

SECONDARY

FUEL

FILTER

PRIMARY

FUEL FILTER

WATER

SEPARATOR

LUBE OIL

PUMP

COLD START

OIL

RESERVOIR

HYDRAULIC

SUPPLY

PUMP

GROUP

FLUID MANIFOLD

HYDRAULIC PASSAGE

FLUID MANIFOLD

HYDRAULIC PASSAGE

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Injector components 3408/12 H E U I

Valve body 

Barrel 

Nozzle 

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6Malaga 

Poppet action 3408/12 H E U I

Poppet closed  From ECM 

Drain cycle From ECM Poppet open 

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Injector check valves 

Reverse flow check valve 

Venting check valve Inlet check valve 

3408/12 H E U I

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Metering ( Prime) 3408/12 H E U I

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Timing wheel 3408/12 H E U I

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3 valve cylinder head 3126B H E U I

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Oil passage 3126B H E U I

E

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Injector sleeve

3126 B H E U I

1 6 B H E

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Component diagram 3126 B H E U I

3126 B H E U

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15Malaga 

Low fuel pressure 3126 B H E U I

3126 B H E U I

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Injection Actuation Pressure Control Valve(IAPCV) 

The IAPCV controls the

HEUI oil pressure 

3126 B H E U I

3126 B H E U I

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Injector

Component 

3126 B H E U I

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Solenoid 3126 B H E U I

3126 B H E U I

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Poppet Valve

closed 

3126 B H E U I

3126 B H E U I

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20Malaga 

Poppet valve

open 

3126 B H E U I

3126 B H E U I

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21Malaga 

Intensifier

piston

and

plunger 

3126 B H E U I

3126 B H E U I

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22Malaga 

Nozzle

assembly 

3126 B H E U I

H E U I

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H E U I

Vertical bolts

Injector clamp

Horizontal bolts

Injector installation

Allen screws

H E U I

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H E U I