1998 ISUZU TROOPER Service Repair Manual

Page 1673 of 3573

ISUZU TROOPER 1998  Service Repair Manual FUEL SYSTEM 6C Ð 7
ON-VEHICLE SERVICE
FUEL FILTER ASSEMBLY
REMOVAL
Preparation: Disconnect battery ground cable.
1. Fuel Filler Cap
2. Lead Switch Harness Connecter
3. Fuel Hose
·Disconnect fuel hos

Page 1674 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6C Ð 8 FUEL SYSTEM
FUEL FILTER CARTRIGE
DISASSEMBLY
·Drain fuel completely from the fuel filter.
·Protect the filter body with cloth and lightly grip with
a vise.
·Remove sedimentor center.
·Remo

Page 1675 of 3573

ISUZU TROOPER 1998  Service Repair Manual FUEL SYSTEM 6C Ð 9
INJECTION NOZZLE
REMOVAL
Preparation:
·Disconnect battery ground cable.
1. Intercooler Assembly (4JG2-T Only)
·(Refer to intercooler removal steps in section 6A2)
2. Air Cleaner

Page 1676 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6C Ð 10 FUEL SYSTEM
DISASSEMBLY
·Grip nozzle holder with a vise, loosen retaining nut
and disassemble.
·Loosen holder nut and remove the nozzle.
CAUTION
·Be careful not to damage the needle valve.

Page 1677 of 3573

ISUZU TROOPER 1998  Service Repair Manual FUEL SYSTEM 6C Ð 11
CAUTION
·If the needle valve does not slide smoothly repair
or replace with a new nozzle assembly.
Nozzle lapping procedure
·Apply thinly a compound (Chrome oxide kneaded
with a

Page 1678 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6C Ð 12 FUEL SYSTEM
·Install retaining nut and tighten nut to the specified
torque.
ADJUSTMENT OF INJECTION STARTING PRES-
SURE
·Set nozzle holder asm on a nozzle tester.
·Apply hydraulic pressure

Page 1679 of 3573

ISUZU TROOPER 1998  Service Repair Manual FUEL SYSTEM 6C Ð 13
·Apply a wrench as illustrated, and tighten the
holder nut to the specified torque using a special
tool.
wrench: nozzle holder 5-8840-0259-0
CAUTION
·After tightening the holder

Page 1680 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6C Ð 14 FUEL SYSTEM
INJECTION PUMP ASSEMBLY
Removal Steps
1. Air cleaner cover & air duct
2. Intercooler assembly
3. Radiator assembly
4. Cooling fan assembly
5. P/S pump drive belt
6. AC generator d