power steering ISUZU AXIOM 2002 Service Owner's Manual

2A±12
POWER±ASSISTED STEERING SYSTEM
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 Inspection
430R200001
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.
Free play: 0 ± 30 mm (0 ± 1.18 in)
2. Also check the steering wheel for play and looseness
in the mount by moving it back and forth and
sideways. When test driving, check for hard steering,
steering shimmy and tendency to pull to one side.
Front End Alignment Inspection and
Adjustment
General Description
ªFront End Alignmentº refers to the angular relationship
between the front wheels, the front suspension attaching
parts and the ground.
Proper front end alignment must be maintained in order to
insure efficient steering, good directional stability and to
prevent abnormal tire wear.
The most important factors of front end alignment are
wheel toe-in, wheel camber and axle caster.Camber:
This illustration shows view from the front of the vehicle.
480RS004Camber is the vertical tilting inward or outward of the front
wheels. When the wheels tilt outward at the top, the
camber is positive (+). When the wheels tilt inward at the
top, the camber is negative (-). The amount of tilt
measured in degrees from the vertical is called the
camber angle (1). If camber is extreme or unequal
between the wheels, improper steering and excessive tire
wear will result. Negative camber causes wear on the
inside of the tire, while positive camber causes wear to the
outside.
Caster:
This illustration shows view from the side of the vehicle.
480RS005

POWER±ASSISTED STEERING SYSTEM2A±13
Caster (1) is the vertical tilting of the wheel axis either
forward or backward (when viewed from the side of the
vehicle). A backward tilt is positive (+) and a forward tilt is
negative (-). On the short and long arm type suspension
you cannot see a caster angle without a special
instrument, but if you look straight down from the top of
the upper control arm to the ground, the ball joints do not
line up (fore and aft) when a caster angle other than 0
degree is present. With a positive angle, the lower ball
joint would be slightly ahead (toward the front of the
vehicle) of the upper ball joint center line.
Toe-in:
This illustration shows view from the top of the vehicle.
480RS003Toe-in is the measured amount the front wheels are
turned in. The actual amount of toe-in is normally a
fraction of a degree. Toe-in is measured from the center
of the tire treads or from the inside of the tires. The
purpose of toe-in is to insure parallel rolling of the front
wheels and to offset any small deflections of the wheel
support system which occurs when the vehicle is rolling
forward. Incorrect toe-in results in excessive toe-in and
unstable steering. Toe-in is the last alignment to be set in
the front end alignment procedure.
Inspection
Before making any adjustments affecting caster, camber
or toe-in, the following front end inspection should be
made.
1. Inspect the tires for proper inflation pressure. Refer to
Main Data and Specifications in Wheel and Tire
System
section.
2. Make sure that the vehicle is unladen condition (With
no passenger or loading).
3. Make sure that the spare tire is installed at the normal
position.
4. Inspect the front wheel bearings for proper
adjustment. Refer to
Front Hub and Disc Overhaul in
Suspension
section.
5. Inspect the ball joints and tie rod ends. If excessive
looseness is noted, correct before adjusting. Refer to
Steering Linkage in this section.6. Inspect the wheel and tires for run-out. Refer to
Wheel Replacement in Wheel and Tire System
section.
7. Inspect the trim height. If not within specifications, the
correction must be made before adjusting caster.
8. Inspect the steering unit for looseness at the frame.
9. Inspect shock absorbers for leaks or any noticeable
noise. Refer to
Shock Absorber in Suspension
section.
10. Inspect the control arms or stabilizer bar attachment
for looseness. Refer to
Suspension section.
11. Inspect the front end alignment using alignment
equipment. Follow the manufacturer's instructions.
12. Park the vehicle on a level surface.
Trim Height Adjustment
Adjust the trim height (1) by means of the adjusting bolt on
the height control arms.
CAUTION: When adjusting front end alignment, be
sure to begin with trim height first, as it may change
other adjusted alignments.
450RS003
410RS001

2A±14
POWER±ASSISTED STEERING SYSTEM
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: 119 + 5 mm (4.69 + 0.2 in)
Caster Adjustment
The caster angle can be adjusted by means of the caster
shims (1) installed between the chassis frame (2) and
fulcrum pins.
Caster angle: 2
30' + 1

CAUTION: Left and right side must be equal within
30'.
450RW006
450RS002
NOTE: Difference of the caster shim front/rear thickness
should be 3.6 mm (0.142 in) or less. Overall thickness of
caster shim and camber shim should be 10.8 mm
(0.425 in) or less.
Tighten the fulcrum pin bolt to the specified torque.
Torque: 152 N´m 112 ( lb ft)
Camber Adjustment
The camber angle can be adjusted by means of the
camber shims (2) installed in position between the
chassis frame (1) and fulcrum pins
Camber angle: 0
+ 30'
King pin inclination: 12
30' + 30'
CAUTION: Left and right side must be equal within
30'.
450RW007
450RS005

POWER±ASSISTED STEERING SYSTEM2A±15
NOTE: Overall thickness of caster shim and camber
shim should be 10.8 mm (0.425 in) or less.
Tighten the fulcrum pin bolt to the specified torque.
Torque: 152 N´m (112 lb ft)
Position of shimsCamber angleCaster angleFront sideRear sideCamber angleCaster angle
When addedWhen removedDecreasesDecreases
Caster shimWhen removedWhen addedIncreasesIncreasesCaster shimÐWhen removedUnchangedDecreases
ÐWhen addedUnchangedIncreases
Camber shimWhen addedDecreasesUnchangedCamber shimWhen removedIncreasesUnchanged
Toe-in Adjustment
1. To adjust the toe-in angle, loosen the lock nuts (2) on
the tie rod (1) and turn the tie rod. Turn both rods the
same amount, to keep the steering wheel centered .
Toe-in: 0 to +2 mm (0 to +0.08 in)
433RW003
2. Tighten the lock nut to the specified torque.
Torque: 98 N´m (72 lb ft)

2A±16
POWER±ASSISTED STEERING SYSTEM
Main Data and Specifications
General Specification
Caster2
30' + 1

Camber0
+ 30'
King pin inclination12
30' + 30'
Toe-in 0 to +2 mm (0 to +0.08 in)
Max. steering angleinside32.6
(+0
30' to ±2
30' )
outside31.8

Torque Specification
E02RX001

POWER±ASSISTED STEERING SYSTEM2A±17
Special Tools
ILLUSTRATIONTOOL NO.
TOOL NAME
J±29877±A
Tester;
Power steering
J±39213
Adapter;
Power steering tester

2A±18
POWER±ASSISTED STEERING SYSTEM
Power Steering Unit
Power Steering Unit and Associated Parts
440R100001
Legend
(1) Bracket
(2) Transfer Gear Assembly(3) Universal Joint Assembly
(4) Power Steering Unit Assembly
(5) Crossmember
Removal
1. Remove the stone guard.
2. Remove the transfer gear assembly and universal
joint assembly.
Make a setting mark across the coupling flange and
transfer gear assembly to ensure reassembly of the
parts in the original position.
3. Drain power steering fluid.
4. Remove the tie rod end assembly from knuckle.
Use tie rod end remover J±29107.
433RW002

POWER±ASSISTED STEERING SYSTEM2A±19
5. Disconnect the feed line and return line from steering
unit.
Remove the clips on the crossmember and frame.
Wire the power steering line to frame.
NOTE: Take care to prevent foreign matter from entry
when disconnect the power steering line.
435RW001
4y4 model:
1. Remove the torsion bar. Refer to
Front Suspension in
Suspension
section.
2. Remove the lower control arm bolt (Frame side).
Refer to
Front Suspension in Suspension section.
3. Apply a setting mark across the crossmember and
frame so parts can be reassembled in their original
position.
431RX013
4. Remove the crossmember fixing bolt.
5. Remove the power steering unit with the
crossmember.6. Remove the power steering unit.
4y2 model:
1. Remove the power steering unit from the
crossmember.
Installation (4y2 Model)
1. Install power steering unit to crossmember.
Tighten fixing bolt to specified torque.
Torque: 116 N´m (85 lb ft)
2. Connect the feed line and return line.
Torque: 25 N´m (18 lb ft)
3. Install tie±rod end assembly to knuckle.
Torque: 118 N´m (87 lb ft)
4.
a. Align the setting marks made at removal.
Install the universal joint assembly to the transfer
gear assembly.
Temporary tighten the universal joint bolt.
b. Install the universal joint assembly to the power
steering unit assembly.
Temporary tighten the universal joint bolt.
c. Install the transfer gear assembly with the shim to
frame.
Torque: 54 N´m (40 lb ft)
d. Tighten the universal joint bolt to the specified
torque.
Torque: 31 N´m (23 lb ft)
5. Install the stone guard.
6. Bleed the system.
Refer to
Bleeding the Power Steering System in this
section.
Installation (4y4 Model)
1. Install power steering unit to crossmember.
Tighten fixing bolt to specified torque.
Torque: 116 N´m (85 lb ft)
2. Install power steering unit with crossmember to frame
by aligning the setting marks made when removing.
Tighten crossmember mounting bolt to specified
torque.
Torque: 173 N´m (128 lb ft)
3. Install lower control arm bolt.
Refer to
Front Suspension in Suspension section.
4. Install torsion bar.
Refer to
Front Suspension in Suspension section.
5. Connect the feed line and return line.
Torque: 25 N´m (18 lb ft)
6. Install tie±rod end assembly to knuckle.
Torque: 118 N´m (87 lb ft)

2A±20
POWER±ASSISTED STEERING SYSTEM
7.
a. Align the setting marks made at removal.
Install the universal joint assembly to the transfer
gear assembly.
Temporary tighten the universal joint bolt.
b. Install the universal joint assembly to the power
steering unit assembly.
Temporary tighten the universal joint bolt.
c. Install the transfer gear assembly with the shim to
frame.
Torque: 54 N´m (40 lb ft)
d. Tighten the universal joint bolt to the specified
torque.
Torque: 31 N´m (23 lb ft)8. Install the stone guard.
9. Bleed the system.
Refer to
Bleeding the Power Steering System in this
section.
Power Steering Unit Disassembled View
440R100002
Legend
(1) Tie-rod End
(2) Lock Nut
(3) Clip
(4) Bellows
(5) Band(6) Tie-rod Assembly
(7) Tab Washer
(8) Oil Line
(9) Valve Housing Assembly
(10) Mounting Rubber
(11) Dust Cover

POWER±ASSISTED STEERING SYSTEM2A±21
Disassembly
NOTE: The valve housing is made of aluminum and care
should be exercised when clamping in a vise, etc. to
prevent distortion or damage.
1. Loosen lock nut and remove tie±rod end.
2. Remove clip (3) and band (5), then remove bellows
(4).
3. Remove tie-rod assembly.
To remove, move the boot toward the tie-rod end,
then remove tab washer.
4. Remove oil line, mounting rubber and dust cover.
Inspection and Repair
Inspect the following parts for wear, damage or any
abnormal conditions.
Tie-rod End
If looseness or play is found when checked by moving the
end of ball joint at tie-rod end, replace tie-rod end.
Tie-rod Assembly
If the resistance is insufficient or play is felt when checked
by moving the ball on the tie-rod, replace the tie-rod
assembly.
Rubber Parts
If wear or damage is found through inspection, replace
with new ones.
Reassembly
1. Install mounting rubber and dust cover (If removed).
2. Install oil line.
Torque: 13 N´ m (113 lb in)
3. Install tie-rod assembly with tab washer.
Apply grease to ball joint, install tie-rod and tab
washer, then tighten to specified torque.
Torque: 83 N´m (61 lb ft)
After tightening, bend tab washer against width
across flat of inner ball joint.
4. Apply a thin coat of grease to the shaft for smooth
installation. Then install bellows.
5. Install band and clip.
6. Install tie-rod end and tighten lock nut.
Torque: 98 N´m (72 lb ft)