service ISUZU TROOPER 1998 Service Repair Manual

SERVICE INFORMATION 00 – 13
STEERING
INSPECTION
Visual check
Check the following parts:
• Oil leakage.
• Steering system for looseness or damage.
• Steering function
• Joint ball for oil leakage or damage.
• Joint ball rubber boot for damage.
MAINTENANCE
The hydraulic system should be kept clean and fluid level
in the reservoir should be checked at regular intervals and
fluid added when required. Refer to "MAINTENANCE AND
LUBRICATION" in section 0B of the manual for type of
fluid to be used and intervals for filling.
If the system contains some dirt, flush it as detailed later
in this section. If it is exceptionally dirty, both the pump
and the gear must be completely disassembled before
further usage.
All tubes, hoses, and fittings should be inspected for
leakage at regular intervals. Fittings must be tight. Make
sure the clips, clamps and supporting tubes and hoses are
in place and properly secured.
Power steering hoses and lines must not be twisted,
kinked or tightly bent. Air in the system will cause spongy
action and noisy operation. When a hose is disconnected
or when fluid is lost, for any reason, the system must be
bled after refilling. Refer to "Bleeding the Power Steering
System" in this section.
FLUID LEVEL
1. Run the engine until the power steering fluid reaches
normal operating temperature, about 55°C (130°F),
then shut the engine off.
2. Check the level of fluid in the reservoir.
3. If the fluid level is low, add power steering fluid as
specified in "MAINTENANCE AND LUBRICATION" in
section 0B to the proper level and install the receiver
cap.
4. When checking the fluid level after the steering
system has been serviced, air must be bled from the
system. Refer to "Bleeding the Power Steering
System" in this section.
SERVICING

00 – 14 SERVICE INFORMATION
STEERING WHEEL FREE PLAY
ADJUSTMENT
INSPECTION
1. Check the amount of steering wheel play by turning
the wheel in both directions until the tires begin to
move with the front wheels properly in the straight
ahead position.
NOTE:
The wheel free play should be checked with the engine
running.
Steering Wheel Free Play mm (in)
0 – 30 (0 – 1.18)
2. Also check the steering wheel for play and looseness
in mount by moving it back and froth and sideways.
While driving, check for hard-steering, steering
shimmy and tendency to pull to one side.
ADJUSTMENT
1. Align the front wheels properly in the straight ahead
position.
2. Loosen the lock nut on the adjusting screw of the
steering gear.
3. Turn the adjust screw clockwise to decrease free play
or counter-clockwise to increase.
4. After check of specified free play, tighten the lock nut
to specified torque.
Lock Nut Torque N·m (kg·m/lb·ft)
41 (4.2 / 30)

SERVICE INFORMATION 00 – 15
FIXING TORQUE
Power Steering N·m (kg·m/lb·ft)
46(4.7/34)
54(5.5/40)17.6(1.8/12.8)
74(7.5/54) 15.7(1.6/11.5) 78(8.0/58)
46(4.7/34)
46(4.7/34)
20(2.0/14)
E03RW015

00 – 16 SERVICE INFORMATION
Power Steering (Cont.) N·m (kg·m/lb·ft)

24(2.4/17)
9.8(1.0/7.1)
59(6.0/43)
54(5.5/40)
22(2.2/16)
E03RW011
These illustrations are based on the LHD model.

SERVICE INFORMATION 00 – 17
Steering Linkage N·m (kg·m/lb·ft)
These illustrations are based on the LHD model.

00 – 18 SERVICE INFORMATION
Steering Column N·m (kg·m/lb·ft)
25 (2.5/18)
8 (0.8/69 lb·in)
34 (3.5/25)
19 (1.9/14)
17 (1.7/12)
This illustration is based on the LHD model.
E03RW010
This illustration is based on the LHD model.
This illustration is based on the LHD model.

SERVICE INFORMATION 00 – 19
Illustration Part No. Part Name
SPECIAL TOOLS
5–8840–0135–0
(J–29877–A)
5–8840–2297–0
(J–39213)
5–8522–0026–0
(J–26508)
5–8840–2121–0
(J–36831)
5–8840–0015–0
(J–22912–01)
5–8521–0016–0
(J–29752)Tester:
Power steering
Adapter:
Power steering tester
For 6VD1, 6VE1, 4JX1
5–8840–0136–0
(J–33996)Adapter:
Power steering tester
For 4JG2
Remover:
Pitman arm
Installer:
Extension housing oil sael
Remover:
Tie rod end
Remover:
Relay lever
Remover:
Steering wheel 5–8840–2005–0
(J–29107)

FRONT END ALIGNMENT 2A – 1
SECTION 2A
FRONT END ALIGNMENT
CONTENTS
PAGE
General Description .......................................................................................................... 2A – 2
Definition of Terms ....................................................................................................... 2A – 2
On-Vehicle Service............................................................................................................ 2A – 3
Inspection ..................................................................................................................... 2A – 3
Trim Height Adjustment .............................................................................................. 2A – 3
Caster Adjustment ....................................................................................................... 2A – 4
Camber Adjustment ..................................................................................................... 2A – 4
Toe-in Adjustment ........................................................................................................ 2A – 5
Maximum Steering Angle Adjustment ...................................................................... 2A – 5

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 Tires” in section 3E.
2. Front wheel bearings for proper adjustment. Refer to
“Front Wheel Drive” in section 4C.
3. Ball joints, tie rod ends and relay rods. If excessive
looseness is noted, correct before adjusting. Refer to
“Steering Linkage” in section 2A.
4. Wheel and tires for run-out. Refer to “Wheels and
Tires”in section 3E.
5. Trim height. If not within specifications, the
correction must be made before adjusting caster.
6. Steering gear for looseness at the frame.
7. Shock absorbers for leaks or any noticeable noise.
Refer to “Front Suspension” in section 3C.
8. Control arms or stabilizer bar attachment for
looseness. Refer to “Front Suspension“ in section 3C.
9. Alignment equipment. Follow the manufacturer’s
instructions.
10. Level of the vehicle. The vehicle must be on a level
surface.
TRIM HEIGHT ADJUSTMENT
Adjust the trim height by means of the adjusting bolt on
the height control arms.
CAUTION:
When adjusting front end alignment, be sure to begin
with trim height as trim height adjustment may change
other adjusted alignments.
1. Check and adjust the tire inflation pressures.
2. Park the vehicle on a level ground and move the front
of the vehicle up and down several times to settle the
suspension.
3. Make necessary adjustment with the adjusting bolt
on the height control arms.
Trim Height(Z) mm(in)
139 ± 5 (5.47 ± 0.2)FRONT END ALIGNMENT 2A – 3
ON-VEHICLE SERVICE

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