Isuzu KB P190. Manual — part 393

FUEL SYSTEM (4JK1/4JJ1) 6C-31

18. Remove the timing chain tension lever pivot.

19. Remove the nut and sprocket.

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Legend

1. Tension Lever Pivot

2. Sprocket

3. Nut

20. Timing chain in moved upwards.

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21. Paint the alignment mark.

Between idle gear A and supply pump gear.

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6C-32 FUEL SYSTEM (4JK1/4JJ1)

22. Use a gear puller to remove the fuel supply pump

gear.

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23. Remove the supply pump (1) and supply pump

bracket (2).

• Disconnect the connector of supply pump.

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Legend

1. Fuel Temperature (FT) Sensor

2. Suction Control Valve (SCV)

Note:

• Do not hold the high pressure pipe, during the

supply pump removal procedure.

• Do not grasp the high pressure pipe, when

moving the supply pump from one location to

another.

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24. Remove the supply pump and O-ring.

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Legend

1. O-ring

2. Supply

Pump

3. High Pressure Pipe

FUEL SYSTEM (4JK1/4JJ1) 6C-33

Installation

1. Install the O-ring to the fuel supply pump.

2. Install the fuel supply pump.

Apply soapy water to the O-ring before attaching.

Note: Take care not to twist the O-ring.

3. Install the fuel supply pump bracket.

Temporarily tighten with the bolts and nuts (Gear

case side).

Temporarily tighten with the bolts (Cylinder body

side).

Fully tighten the nuts and bolts (Gear case side).

Fully tighten the bolts (Cylinder body side).

Tightening torque: 25 N

⋅⋅⋅⋅m (2.5 kg⋅⋅⋅⋅m /18 lb ft)

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Legend

1. Fuel Supply Pump

2. Fuel Supply Pump Bracket

4. Confirm that the supply pump camshaft key is

turned to the right and is horizontal.

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5. Install the fuel supply pump gear to the pump

shaft.

a. Align the fuel pump gear timing mark (1) with

the idle gear A paint marks (2).

b. Ensure that the pump gear is bitten with main

gear (3) of the idle gear A. Depress the pump

gear when it is bitten with scissors gear (4) of

the idle gear A.

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6C-34 FUEL SYSTEM (4JK1/4JJ1)

6. Install the timing chain to the each sprocket and

install the fuel supply pump sprocket to the pump

shaft.

a. Align the camshaft sprocket timing mark (1)

with the dark plate timing chain link (2).

b. Align the fuel supply pump sprocket timing

mark (3) with the yellow plate timing chain link

(4).

c. Install the fuel supply pump sprocket to the fuel

pump shaft by aligning the dowel pin that is

attached to the gear.

d. Hand-tighten the fuel supply pump shaft nut.

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7. Install the timing chain tension lever pivot. Hand-

tighten the pivot bolt.

• Confirm the tension lever moves smoothly.

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8. Attach the hook of the timing chain tensioner.

• Hold the latch (3) depressed. Insert the plunger

(2). Attach the hook (5) to the pin (1) to hold the

plunger in place.

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