steering wheel ISUZU TROOPER 1995 Owner's Manual

381 - 4 POWER STEERING GEAR AND PUMP
ON-VEHICLE SERVICE
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 OB
ofthe manual for type offluid 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 LUBRI­
CATION" in Section OB 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.
BLEEDING THE POWER STEERING
SYSTEM
When a power steering pump or gear has been
installed, or an oil line has been disconnected, the air
that has entered the system must be bled out before
the vehicle is operated. If air is allowed to remain in
the power steering fluid system, noisy and
unsatisfactory operation of the system may result.
BLEEDING PROCEDURE
When bleeding the system, and any time fluid is
added
to the power steering system, be sure to use
only power steering fluid as specified in
"MAINTENANCE AND LUBRICATION" in section OB.
1. Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two minutes.
2. Start the engine and let it run for a few seconds.
Do
not turn the steering wheel. Then turn the
engine off.
3. Add fluid if necessary.
4. Repeat the above procedure until the fluid level
remains constant after running the engine.
5. Raise the front end of the vehicle so that the
wheels are off the ground.
6. Start the engine. Slowly turn the steering wheel
right and left, lightly contacting the wheel stops.
7. Add power steering fluid if necessary.
8. Lower the vehicle and turn the steering wheel
slowly from lock to lock.
9. Stop the engine. Check the fluid level and refill
as required.
10.
If the fluid is extremely foamy, allow the vehicle
to stand a few minutes and repeat the above
procedure.
~ INSPECT
• Belt for tightness.
• Pulley for looseness or damage. The pulley
should not wobble with the engine running.
• Hoses so they are not touching any other parts
of the vehicle.
• Fluid level
and fill to the proper level.
FLUSHING THE POWER STEERING
SYSTEM
1. Raise the front end of the vehicle off the ground
until the wheels are free to turn.
2. Remove the fluid return line at the pump inlet
connector and plug the connector port on the
pump.
Position the line toward a large container to
catch the draining fluid.
3. While running the engine at idle, fill the reservoir
with new power steering fluid. Turn the steering
wheel in both directions. DO NOT contact wheel
stops or hold the wheel in a corner, or fluid will
stop and the pump will be in pressure relief mode.
A sudden
overflow from the reservoir may
develop if the wheel is held at a stop.
4. Install all the lines and hoses. Fill the system with
new power steering fluid and bleed the system
as described in "Bleeding The Power Steering
System". Operate the engine for about 15
minutes.
Remove the
pump return line at the pump inlet
and plug the connection on the pump. While
refilling the reservoir, check the draining fluid for
contamination. If foreign material is still evident,
replace all lines, disassemble and clean or replace
the power steering system components. Do not
re-use any drained power steering fluid.
~
~

STEERING WHEEL FREE PLAY ADJUST­
MENT
IL•I INSPECTION (Fig. 381-4)
1. With the tires in the straight-ahead position, check
the
amount of steering wheel play by turning the
wheel in both directions until the tires begin to
move.
NOTE:
The wheel free play should be checked with the engine
running.
~~~~F-r-ee--pl-ay---m-m--(in_)_,j--o----3-0-(0----1-.1-8~)-
2. Also check the steering wheel for play and
looseness in mount by moving it back and forth
and sideways.
While driving, check for hard
steering, steering
shimmy and tendency to pull to
one side.
POWER STEERING GEAR AND PUMP 381-5
IEEI ADJUSTMENT (Fig. 381-5)
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 incre~se.
4. After check of specified free play, t1ghten the lock
nut to specified torque.
~~~ Torque N·m (lb·ft) I 41 (30)
Fig. 381-5

STEERING LINKAGE 383-1
SECTION 383
STEERING LINKAGE
w CAUTION:
• When fasteners are removed, always reinstall them at the same location from which they were removed. If a
fastener needs
to be replaced, use the correct part number fastener for that application. If the correct part
number fastener is not available, a fastener of equal size and strength (or stronger) may be used. Fasteners
that are not reused, and those requiring thread locking compound, will be called out. The correct torque
value must be used when installing fasteners that require it. If the above conditions are not followed, parts or
system damage could result.
CONTENTS
General Description . . . . . . . . . . . . . . . . . . . . 383-1
On-Vehicle Service .................... 383-2
Center Track Rod Assembly . . . . . . . . . . . 383-2
Outer Track Rod Assembly . . . . . . . . . . . . 383-4
Relay Lever . . . . . . . . . . . . . . . . . . . . . . . . . 383-6 Main
Data
and Specifications ............ 383-8
Torque Specifications
................ 383-8
Special Tools .......................... 383-8
GENERAL DESCRIPTION
The steering linkage consists of a pitman arm, relay
lever,
center track rod and two adjustable outer track
rods.
When the steering
wheel is turned, the gear rotates the
pitman arm
which forces the center track rod to one
side. The outer track rods, connected to the center
track rod
by ball studs, transfer the steering force to the
wheels. The outer track rods are adjustable and are
used
for toe-in adjustments. The center track rod is
supported
by the pitman arm and relay lever. The relay lever
pivots
on a support attached to the frame.
The
overall condition of the steering linkage affects
steering performance.
If parts are bent, damaged,
worn or poorly lubricated, improper and possibly
dangerous steering action will result.
Whenever any steering linkage components are
replied or replaced, check the steering geometry and
front end alignment. Refer to Front End Alignment
(Sec. 3A).
Center track rod assembly
Rod end, inner
Track rod
Rod end, outer
Relay lever---~·--:;:::jo
I
I Outer track rod assembly
Fig. 383-1

383 - 4 STEERING LINKAGE
OUTER TRACK ROD ASSEMBLY
1+•1 REMOVAL
Fig. 3B3-6
2.
Preparation: • Remove wheel and tire assembly.
Refer to "Wheels and tires" in
section
3E. ~
Removal steps
1. Nut and cotter pin, center
track rod
2. Nut and cotter pin, knuckle
arm
3. Lock nut, outer
4. Rod end assembly, outer
5. Lock nut, inner
6. Rod end assembly, inner
Installation steps
To install, follow the removal
steps in the reverse order.
* The screw is threaded
counterclockwise.
Nut and cotter pin, knuckle arm
• Remove outer track rod assembly from the
knuckle arm (Fig. 3B3-8).
Remover: J-36831
1. Nut and cotter pin, center track rod
• Disconnect outer track rod assembly at the
center track rod (Fig. 3B3-7).
'\f CAUTION:
Be careful not to break the ball joint boot.
3. Lock nut, outer Remover: J-36831
CAUTION:
Be careful not to break the ball joint boot.
J-36831
Fig. 3B3-8
Fig. 3B3-7

FRONT SUSPENSION 3C-1
SECTION 3C
FRONT SUSPENSION
'\f CAUTION:
When fasteners are removed, always reinstall them at the same location from which they were removed.
If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct
part
number fastener is not available, a fastener of equal size and strength (or stronger) may be used.
Fasteners
that are not reused, and those requiring thread locking compound, will be called out. The correct
torque value must be used when installing fasteners that require it. If the above conditions are not
followed, parts or system damage could result.
Refer to section 3A in this manual for the wheel alignment procedure.
CONTENTS
General Description .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 3C- 1
On-Vehicle Service .............................. 3C-3
Shock Absorber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3C-3
Stabilizer Bar . .. .. . .. .. ..

.. . .. .. . .. .. .. . .. .. .. . 3C- 4
Torsion Bar
.................................... 3C-5
Knuckle . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3C-7
Upper
Control Arm ........................... 3C-10
Lower Control Arm ........................... 3C-13
Upper Ball Joint ............................... 3C- 16
Lower
Ball Joint ............................... 3C-18
Main Data and Specifications.................. 3C-20
General
Specifications . .

. . . . . . . . . . . . . . . . . . . . . 3C-
20
Torque Specifications ........................ 3C-21
Special Tools ..................................... 3C-22
GENERAL DESCRIPTION
The front suspension is designed to allow each wheel
to compensate for changes in the road surface level
without greatly affecting the opposite wheel. Each
wheel is independently connected to the frame by a
steering
knuckle, ball joint assemblies, and upper and
lower control arms. The front wheels are held in
proper relationship to each other by two outer track
rods
which are connected to steering arms on the
knuckles and to a center track rod.
All models have a front suspension system consisting
of control arms, stabilizer bar, shock absorber and a
torsion bar. The front end of the torsion bar is
attached
to the lower control arm. The rear of the
torsion bar is mounted into a height control arm at the
crossmember. Vehicle trim height is controlled by
adjusting this arm.
Shock absorbers are
mounted between the brackets
on the
frame and the lower control arms. The lower
portion of each shock absorber is attached to the
lower control arm by a bolt and nut. The upper portion
of each shock absorber extends through a frame
bracket and is secured with two rubber bushings,
three retainers and a nut.
Ball joint assemblies are bolted to the outer end of the
upper and lower control arm and are attached to the
steering
knuckle by nuts and cotter pins.
The
inner ends of the upper control arm have pressed
in bushings.
Bolts, passing through the bushing,
attach the control arm to the frame. The inner ends of
the lower control arm are attached to the frame by
bolts passing through the bushings, which are
pressed in the frame.
Side
roll of the front suspension is controlled by a
spring steel stabilizer bar. It is mounted in rubber
bushings, which are held to the crossmember by
brackets. The ends of the stabilizer bar are connected
to the lower control arms by links.

FRONT SUSPENSION 3C-7
KNUCKLE
2
~,
Removal steps 1. Torsion bar 6. Oil seal Installation steps 2.
Back plate 7. Thrust washer To install, follow the removal steps in the reverse order. 3. Lower ball joint 8. Needle bearing
4. Upper
ball joint 9. Knuckle
5. Knuckle assembly
Fig. 3C-13
1••1 REMOVAL
Preparation: • Raise the vehicle and support the
frame
with suitable safety stands.
• Remove wheel and tire assembly.
Refer to
"Wheels and Tires" in
section
3E.
• Remove the brake caliper. Refer
to"Brakes" in section 5.
• Remove the hub assembly. Refer to
"Hub and Disk" in section 4C.
• Remove outer track rod from the
knuckle. Refer to
"Steering
Linkage" in section 3B3.
• Remove the speed sensor (If
equipped with antilock brake
system)
from the knuckle. 1.
Torsion bar
• Loosen
torsion bar by height control arm adjust
bolt.
• Refer to "Torsion bar" in this section.
2. Back plate
3. Lower ball joint (Fig. 3C-14)
1®.1 Remover: J-291 07
'\f7 CAUTION:
'(! Be careful not to break the ball joint boot.
4. Upper ball joint (Fig. 3C-15)
1®.1 Remover: J-36831
'\f7 CAUTION:
'(! Be careful not to break the ball joint boot.
5. Knuckle assembly

FRONT SUSPENSION 3C-13
LOWER CONTROL ARM
Removal steps
1. Nut and washer, front
2. Nut and washer, rear
3. Torsion bar
4. Torsion bar arm bracket
5. Stabilizer link
6. Shock absorber
7. Lower ball joint
8. Bolt, front
9. Bolt, rear
10. Lower control arm
11. Bolt, torsion bar arm
12. Bolt, lower ball joint
13. Bush, front
14. Bush, rear
Installation steps
2 To
Install, follow the
14
removal steps in the
Qj ~ ';ve"'e mde,.
;<
~7
10
Fig. 3C-28
1••1 REMOVAL
Preparation: • Raise the vehicle and support the
frame with suitable safety stands.
• Remove wheel and tire assembly.
Refer to "Wheels and Tires" in
section 3E.
• Remove the outer track rod from the
knuckle. Refer to "Steering linkage"
in section 383.
• Remove the retaining ring from the
front axle driving shaft to release the
shaft from hub. Refer to "Front axle"
in section 4C.
• Support lower control arm with a
jack.
1. Nut and washer, front
2. Nut and washer, rear
3. Torsion bar
• Refer to "Torsion bar" in this section.
4. Torsion bar arm bracket
5. Stabilizer link
• Disconnect the link at the lower control arm.
6. Shock absorber
• Remove the shock absorber lower end from
the lower control arm.
7. Lower ball joint
• Remove the lower ball joint from the lower
control arm.
8. Bolt, front

3C-18 FRONT SUSPENSION
LOWER BALL JOINT
Fig. 3C-40
1••1 REMOVAL
Preparation: • Raise the vehicle and support the
frame
with suitable safety stands.
• Remove wheel and tire assembly.
Refer to "Wheels and Tires" in
section
3E.
• Remove the outer track rod from
the knuckle. Refer to "Steering
linkage"
in section 383.
• Remove the retaining ring from the
front axle driving shaft to release
the shaft from hub. Refer to "Front
axle"
in section 4C.
• Support lower control arm with a
jack.
1. Nut and cotter pin
• Remove the lower ball joint from the knuckle
(Fig. 3C-41).
1®..1 Remover: J-291 07
\f7 CAUTION:
VI Be careful not to break the ball joint boot.
2. Nut
3. Lower ball joint
4. Bolt
Removal steps 1. Nut and cotter pin
2. Nut
3. Lower
ball joint 4. Bolt
Installation
steps
To
install, follow the removal steps in the reverse order.
Fig. 3C-41
..

INFLATION OF TIRES
Tire pressure, in cold condition (after vehicle has setfor
three hours or more, and driven less than one mile),
should
be checked monthly or before any extended
trip. Tire pressure increases
approximately 15% when
the tires become hot during driving. Tire pressure
specification is shown on the
label located on the left
door lock pillar (Fig. 3E-5).
Fig.
3E-5
NOTE:
Check the tire pressure whenever irregular wear is
found. Tire
inflation greatly affects tire wear. If the
alignment check does not reveal any alignment
problems,
check the condition of the shock absorbers
and
wheel/tire balance.
WHEELS AND TIRES 3E-3
DIAGNOSIS LIST
If the following conditions are noted, rotation is
required.
1. Front tire wear is different from rear.
2. Uneven wear exists across the tread of any tire.
3. Left and right front tire wear is unequal.
4. Left and right rear tire wear is unequal.
If
the following conditions are noted, check the wheel
alignment.
1. Left and right front tire wear is unequal.
2. Uneven wear exists across the tread of any tire.
3. Front tire treads have scuffed appearance with
"feather" edges on one side of tread ribs or
blocks.
4. There is cupping, flat spotting etc.
Higher than recommended pressure can cause:
1. Hard ride.
2. Poor steering stability.
3. Rapid and uneven wear at center of the tread.
Lower than recommended pressure can cause:
1. Tire squeal on turns.
2. Hard steering.
3. Rapid and uneven wear on the edges of the tread.
4. Tire rim bruises and rupture.
5. Tire cord breakage.
6. High tire temperatures.
7. Reduced handling.
8. Reduced fuel economy.
Unequal pressure on same axle can cause:
1. Uneven braking
2. Steering lead.
3. Reduced handling.
4. Swerve on acceleration

SUPPLEMENTAL RESTRAINT SYSTEM (SRSl STEERING WHEEL & COLUMN 3F4-1
SECTION 3F4
SUPPLEMENTAL RESTRAINT SYSTEM
STEERING
WHEEL & COLUMN
W CAUTION:
When fasteners are removed, always reinstall them at the same location from which they were removed.
If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct
part
number fastener is not available, a fastener of equal size and strength (or stronger) may be used.
Fasteners
that are not reused, and those requiring thread locking compound, will be called out. The correct
torque value must be used when installing fasteners that require it. If the above conditions are not
followed, parts or system damage could result.
CONTENTS
General Description .......................................... 3F4-1
Lock Cylinder Replacement ......................... 3F4-10
On-Vehicle Service
............................................ 3F4-2 Steering Column Replacement .................... 3F4-13
Special Service Precaution ........................... 3F4-2 Main Data and Specifications .......................... 3F4-17
Inflator Module Replacement ...................... 3F4-3 Torque
Specifications ................................... 3F4-17
Steering Wheel Replacement ...................... 3F4-4 Special Tools ..................................................... 3F4-17
Combination
Switch Replacement ............. 3F4-7
GENERAL DESCRIPTION
W WARNING
TO AVOID DEPLOYMENT WHEN TROUBLE­
SHOOTING
THE SRS SYSTEM, DO NOT USE
ELECTRICAL TEST EQUIPMENT, SUCH AS
BATTERY-POWERED OR A/C-POWERED VOLT­
METER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN SPE­
CIFIED IN THIS MANUAL. DO NOT USE A NON­
POWERED
PROBE-TYPE TESTER.
INSTRUCTION IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PER­
SONAL INJURY MAY RESULT.
This steering
wheel and column repair section covers
the Supplemental Restraint System (SRS) steering
column. The following repair procedures are specific
to SRS Components. When servicing a vehicle
equipped with Supplemental Restraint System, pay
close attention to all WARNINGS and CAUTIONS.
For detailed explanation about SRS, refer to Section
9J "SUPPLEMENTAL
RESTRAINT SYSTEM (SRS)" of
this manual.
The steering column has three important features in
addition to the steering function:
1. The column is energy absorbing, designed to
compress in a front-end collision to minimize the
possibility of injury to the driver of the vehicle.
2. The ignition switch and lock are mounted con­
veniently on the column.
3. With the column mounted lock, the ignition and
steering operation can be
locked to prevent theft
of the vehicle.
The column may be disassembled and reassembled.
To insure the energy absorbing action, it is important
that the specified screws, bolts and nuts be used only
as designated and that they are tightened to the
specified torque.
When the column is removed from the vehicle, a
sharp
blow on the end of steering shaft or shift lever,
leaning
on the column assembly, or dropping the
assembly could shear or loosen the fasteners that
maintain column rigidity.