Isuzu KB P190. Manual — part 388

FUEL SYSTEM (4JK1/4JJ1) 6C-11

Step Action

Value(s)

Yes

No

6

Check the fuel tank.

If a problem is found, clean, repair, or replace
as necessary.

• Foreign material (Clogged suction port)
• Bent or cracked suction pipe
• Fuel tank distortion
• Fuel tank improper installation
• Fuel pump and sender malfunction
• Clogged fuel cap hole
• Water

Is the action complete?



Go to Step 7



7

Bleed the air from the fuel pipe again. Refer to
Fuel System Air Bleeding in this section.

Is the action complete?



Verify repair



6C-12 FUEL SYSTEM (4JK1/4JJ1)

Fuel Filter Assembly

Components

RTW76CSF000101

Legend

1. Fuel Sedimenter Connector

2. Bolt

3. Harness Connector

4. Fuel

Hose

5. Fuel Filter Assembly

Removal

1. Remove the fuel filler cap.

2. Remove the fuel sedimenter connector.

3. Disconnect the harness connector.

4. Remove the feed hose and the return hose from

the fuel filter and plug it so that the fuel does not

flow out.

5. Remove the bolts for mounting the fuel filter.

6. Remove the fuel filter assembly.

Installation

1. Install the fuel filter assembly.

2. Install the bolts for mounting the fuel filter.

3. Install the feed hose and the return hose.

4. Connect the harness connector.

5. Install the fuel sedimenter connector.

6. Install the fuel filler cap.

7. Bleed out the air.

• Refer to "Fuel System".

FUEL SYSTEM (4JK1/4JJ1) 6C-13

Fuel Filter Element

Removal

1. Detach the drain hose on the lower part of the fuel

filter or the drain plug, loosen the air bleed plug,

and drain the fuel from the fuel filter.

2. Detach the water-in-fuel switch harness.

3. Turn the element case counterclockwise to detach,

and remove the filter element.

4. Replace the O-ring and confirm the snap-fit

position, and fit a new filter element inside the

element case.

NOTE

It is strongly advisable to use the ISUZU/GM genuine
fuel filter for replacement.

RTW76CSH000901

Legend

1. Element

2. O-ring

3. Sedimenter Sensor

Installation

1. Apply a light coat of new diesel oil to the O-ring

and gasket.

2. Turn the element case clockwise until it is

completely seated against the upper cover. Then

check that the drain hose is in its correct position,

and then use a filter wrench and tighten to the

specified torque.

Tightening torque: 25 N

⋅⋅⋅⋅m (2.5 kg⋅⋅⋅⋅m / 18 lb ft)

3. Use a clip to fix the drain hose at the base of the

fuel filter, and fit the water-in-fuel switch harness.

6C-14 FUEL SYSTEM (4JK1/4JJ1)

Fuel Injector

Components

RTW76CLF000101

Legend

1. Cylinder Head Cover

2. Fuel Injector Clamp

3. Fuel Injector Clamp Bolt

4. Fuel

Injector

5. Fuel Injection Pipe

6. Fuel Injection Pipe Clip