Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 585

ENGINE COOLING 6B – 11

FAN CLUTCH WITH COOLING FAN

INSPECTION AND REPAIR

Make necessary correction or parts replacement if wear, damage or any other abnormal condition are found
through inspection.

Visually inspect for damage, leak (sillicon grease) or other
abnormal conditions.

1. Inspection

(on-vehicle)

1) Turn the fan clutch by hand when in a low temperature

condition before starting the engine, and confirm that it
can be turned readily.

2) Start the engine to warm it up until the temperature at

the fan clutch portion gets to around 80

°C. Then stop

the engine and confirm that the fan clutch can be
turned with considerable effort (clutch torque) when
turned by hand.

If the fan clutch rotates more readily, however, this
indicates that the silicone grease is leaking internally.
Replace the fan clutch with a new one.

2. Inspection

(in

unit)

Warm up the bimetal of the fan clutch by using the heat
gun until the temperature gets to about 80

°C when

measured with the thermistor. Then confirm that the fan
clutch can be turned with considerable effort (clutch
torque).
If the fan clutch retates more readily at this time, this
indicates that the silicone grease is leaking internally.
Replace the fan clutch with a new one.

6B – 12 ENGINE COOLING

MEMO

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FUEL SYSTEM 6C – 1

SECTION 6C

FUEL SYSTEM

TABLE OF CONTENTS

PAGE

Main Data and Specifications . . . . . . . . . . . . . . . . . . . . . ... 6C - 2

General Description. . . . . . . . . . . . . . . . . . . . . . . . . ... 6C - 4

Injection Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 6C - 13

Removal and Installation . . . . . . . . . . . . . . . . . . . . . . .. 6C - 13

Belt Drive Model (4JA1T, 4JG2T) . . . . . . . . . . . . . . . . . . . 6C - 13

Gear Drive Model (4JA1, 4JB1T) . . . . . . . . . . . . . . . . . . .. 6C - 18

Gear Drive Model (4JA1TC, 4JH1TC). . . . . . . . . . . . . . . . ... 6C - 20

Injection Pump Calibration Data. . . . . . . . . . . . . . . . . . . . ... 6C - 23

Injection Nozzle. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6C - 31

Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . ...

6C

- 31

Inspection and Repair . . . . . . . . . . . . . . . . . . . . . . . ... 6C - 32

Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . .

6C

- 33

Injection Nozzle (For 4JG2T Engine). . . . . . . . . . . . . . . . . . . 6C - 35

Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . ...

6C

- 35

Inspection and Repair . . . . . . . . . . . . . . . . . . . . . . . ... 6C - 37

Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . .

6C

- 38

Inspection and Adjustment. . . . . . . . . . . . . . . . . . . . . ... 6C - 39

Injection Nozzle (For 4JA1TC, 4JH1TC Engine) . . . . . . . . . . . . . . .. 6C - 40

Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . ...

6C

- 40

Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . .

6C

- 41

Injection Nozzle Adjustment. . . . . . . . . . . . . . . . . . . . . . 6C - 43

Adjustment Procedure For Potentiometer. . . . . . . . . . . . . . . . ... 6C - 51

INDEX

6C – 2 FUEL SYSTEM

MAIN DATA AND SPECIFICATIONS

Description

Item

4JA1 4JB1T

Injection pump type
Plunger outside diameter

mm (in)

Plunger prestroke

mm (in)

Bosch Distributor

11 (0.43)

0.45 (0.0177)

Governor type

Mechanical variable all speed

Mechanical limit speed

Timer

type

Fuel feed pump type

Injection nozzle type

Number of injection nozzle orifices

Oil pressure

Vane with input shaft

Hole type

5

Injection nozzle orifices

mm (in)

0.21 (0.0083)

0.27 (0.0106)

Inside

diameter

Injection

nozzle

opening

kg/cm

2

(psi/MPa)

Main fuel filter type

185 (2,631/18.1)

Disposable cartridge paper element and water separator

Item

4JA1T 4JG2T

Injection pump type
Plunger outside diameter

mm (in)

Bosch Distributor

11 (0.43)

Plunger prestroke

mm (in)

0.45 (0.0177)

-

Governor

type

Timer

type

Fuel feed pump type

Mechanical variable (Variable half speed)

Oil pressure

Vane with input shaft

Injection nozzle type

Number of injection nozzle orifices

Injection nozzle orifices

mm (in)

Inside

diameter

Injection

nozzle

opening

kg/cm

2

(psi/MPa)

Hole type

5

0.21 (0.0083)

185 (2,631/18.1)

Throttle type

1

1 (0.04)

150 (2,133/14.7)

Main fuel filter type

Disposable cartridge paper element and water separator