1998 ISUZU TROOPER Service Repair Manual

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Page 305 of 3573

ISUZU TROOPER 1998 Service Repair Manual INSPECTION
Before making any adjustments affecting caster, camber
or toe-in, the following front end inspection should be
made.
INSPECT
1. Tires for proper inflation pressure. Refer to “Wheels
and T

Page 306 of 3573

ISUZU TROOPER 1998 Service Repair Manual 2A – 4 FRONT END ALIGNMENT
CASTER ADJUSTMENT
The caster angle can be adjusted by means of the caster
shims installed between the chassis frame and fulcrum
pins.
Caster Angle
1998 model
2° 10‘ ±

Page 307 of 3573

ISUZU TROOPER 1998 Service Repair Manual FRONT END ALIGNMENT 2A – 5
Position of shim
Camber angle Caster angle
Front side Rear side
When added When removed Decreases Decreases
When removed When added Increases Increases
Caster shim
When r

Page 308 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6. Tighten the lock nut to the specified torque.
Lock Nut Torque N·m (kg·m/lb·ft)
23 (2.3 / 17) 2A – 6 FRONT END ALIGNMENT
4. Similarly adjust the inside wheel angle of the other
side with stoppe

Page 309 of 3573

ISUZU TROOPER 1998 Service Repair Manual POWER STEERING 2A – 7
SECTION 2A
POWER STEERING
CONTENTS
PAGE
General Description ......................................................................................................... 2A – 8

POWER STEERING 2A – 7
SECTION 2A
POWER STEERING
CONTENTS
PAGE
General Description ......................................................................................................... 2A – 8
Power Steering Gear ................................................................................................... 2A – 9
Hydraulic Pump ........................................................................................................... 2A – 9
Pressure Switch (6VD1, 6VE1 Engine) ....................................................................... 2A – 9
Power Steering System Test .......................................................................................... 2A – 10
On-Vehicle Service ........................................................................................................... 2A – 12
Bleeding The Power Steering System ....................................................................... 2A – 12
Flushing The Power Steering System ....................................................................... 2A – 12
Steering Gear ............................................................................................................... 2A – 13
Power Steering Pump (6VD1, 6VE1 Engine Models) ............................................... 2A – 16
Power Steering Pump (4JG2 Engine Model) ............................................................ 2A – 18
Power Steering Pump (4JX1 Engine Model)............................................................. 2A – 20
Unit Repair........................................................................................................................ 2A – 22
Steering Gear ............................................................................................................... 2A – 22
Power Steering Pump (6VD1, 6VE1 Engine Models) ............................................... 2A – 28
Power Steering Pump (4JG2 Engine Model) ............................................................ 2A – 32
Power Steering Pump (4JX1 Engine Model)............................................................. 2A – 36

Page 310 of 3573

ISUZU TROOPER 1998 Service Repair Manual 2A – 8 POWER STEERING
GENERAL DESCRIPTION
6VD1, 6VE1 Engine Models4JG2 Engine Model4JX1 Engine Model
This illustration is based on the LHD model.

Page 311 of 3573

ISUZU TROOPER 1998 Service Repair Manual POWER STEERING 2A – 9
The hydraulic power steering system consists of a
pump, an oil reservoir, a steering gear, a pressure
hose and a return hose.
POWER STEERING GEAR
The power steering gear has a

Page 312 of 3573

ISUZU TROOPER 1998 Service Repair Manual 2A – 10 POWER STEERING
POWER STEERING SYSTEM TEST
TEST PROCEDURE
Test of fluid pressure in the power steering system
is performed to determine whether or not the oil
pump and power steering unit are

2A – 10 POWER STEERING
POWER STEERING SYSTEM TEST
TEST PROCEDURE
Test of fluid pressure in the power steering system
is performed to determine whether or not the oil
pump and power steering unit are functioning
normally.
The power steering system test is method used to
identify and isolate hydraulic circuit difficulties.
Prior to performing this test, the following
inspections and corrections, if necessary, must be
made.
INSPECT
•Pump reservoir for proper fluid level.
•Pump belt for proper tension.
•Pump driver pulley condition.
1. Place a container under the pump to catch the
fluid when disconnecting or connecting the
hoses.
2. With the engine NOT running , disconnect the
pressure hose at the power steering pump and
install Power Steering tester.
The gage must be between the shutoff valve
and pump. Open the shutoff valve.
Tester: 5-8840-0135-0 (J-29877-A)
Adapter: 5-8840-2297-0 (For 6VD1, 6VE1, 4JX1)
5-8840-0136-0 (For 4JG2)3. Check the fluid level. Fill the reservoir with
power steering fluid, to the “Full” mark. Start
the engine then turn the steering wheel and
momentarily hold it against a stop. Turn off
and check the connections at tester for leakage.
4. Bleed the system. Refer to “Bleeding the
Power Steering System” in this section.
5. Start the engine and check the pump fluid
level. Add power steering fluid if required.
When the engine is at normal operating
temperature, increase engine speed to 1500
rpm.
CAUTION:
Do not leave shutoff valve fully closed for more
than 5 seconds, as the pump could become
damaged internally.
6. Fully close the shutoff valve. Record the
highest pressures.
•If the pressure recorded is within 9300-9800
kPa (1350-1420 psi) For 6VD1, 6VE1, and
9800-10300 kPa (100-105 kg/cm
2/ 1420-1490
psi) For 4JG2, 4JX1, the pump is functioning
within its specifications.
•If the pressure recorded is higher than 9800
kPa (1420 psi) For 6VD1, 6VE1, and 10300
kPa (105 kg/cm
2/ 1490 psi) For 4JG2, 4JX1,
the valve in the pump is defective.

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