Isuzu KB P190. Service 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
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