wheel torque ISUZU TF SERIES 2004 Manual PDF

3B-24 POWER-ASSISTED STEERING SYSTEM

Side Plate
The sliding faces of parts must be free from step wear
(more than 0.01 mm), which can be felt by the finger
nail. The parts with minor scores may be reused after
lapping the face.

Valve
The sliding face of the valve must be free from burrs
and damage. The parts with minor scores may be
reused after smoothing with emery cloth (#800 or finer).

Shaft
Oil seal sliding faces must be free from a step wear
which can be felt by the finger nail. Needle bearing fitting
face must be free from damage and wear.

O-ring, Oil Seal, Retaining Ring
Be sure to discard used parts, and always use new
parts for installation. Prior to installation, lubricate all
seals and rings with power steering fluid.

Pressure Switch
Check the switch operation as follows:
With engine idling and A/C on, turn the steering wheel
fully to the left; compressor should interrupt and engine
idle speed will increase. Shut off A/C and again turn
steering fully to the left; engine idle will increase. I
f
system fails to function properly, disconnect connector
at the pressure switch and repeat system check while
testing continuity across disconnected SW connector.

Reassembly
1. Install oil seal to front housing. Be sure to discard
used oil seal, and always use new parts fo
r
installation.
CAUTION: When installing the oil seal, be careful
not to damage the oil seal contacting surface of the
housing.
2. Install shaft assembly.
3. Install the vanes to roter with curved face in contact
with the inner wall of cam.
442RS005
4. Install rotor and vanes to cam.
5. Install pin to front housing.
6. Install two new O-rings to front housing. Be sure to
discard used O-ring.
7. Install side plate.
CAUTION: When installing side plate, be careful not
to damage its inner surface. Damaged side plate
may cause poor pump performance, pump seizure
or oil leakage.
8. Install pump cartridge assembly to front housing.
9. Install snap ring to shaft end.
10. Install rear housing with a new O-ring. Be sure to
discard used O-ring. Then install bolt and tighten it
to specified torque.
Torque: 22-26 N




m (2.2-2.7 kg




m/16-20 lb ft)
11. Install suction pipe with a new O-ring. Be sure to
discard used O-ring. Then install bolt and tighten it
to specified torque.
Torque: 7.8-12 N




m (0.8-1.2 kg




m/6-9 lb ft)
12. Install relief valve and spring.
13. Install connector with a new O-ring. Be sure to
discard used O-ring. Tighten the connector to
specified torque.
Torque: 49-69 N




m (5.0-7.0 kg




m/36-51 lb ft)
14. Install pressure switch assembly and tighten it to
specified torque.
Torque: 15-20 N




m (1.5-2.0 kg




m/11-14 lb ft)

POWER-ASSISTED STEERING SYSTEM 3B-35

Inspection and Repair (with SRS air
bag)
The inflator module consists of a cover, air bag, inflator,
and retainer. Inspect the inflator module mainly for the
following:


Check for holes, cracks, severe blemishes and
deformation on the cover.


Check that the retainer is not deformed.


Check for defects such as damage and breakage in
the lead wire for the igniter.
If an abnormality is found as the result of the inspection,
replace the inflator module with a new one.

Installation
1. Support the inflator module and carefully connect the
SRS connector and horn lead. (with SRS air bag)
060R300041


2. Connect the horn leads at center of wheel. (without
SRS air bag)
NOTE: Horn leads is letting a bracket top pass.
(Plastic type steering wheel only)



RTW43BSH000301
3. Push the born pad area 1-4.
Tighten the born pad fixing screw to the specifed
torque (without SRS air bag)
Torque: 2 - 4 N





m (0.2 – 0.4 kg





m/17 - 35 lb ft)
NOTE: A horn pad is not struck at the time o
f
attachment.



RTW43BSH000401

3B-40 POWER-ASSISTED STEERING SYSTEM



430RX005-X
14. Remove steering column cover.
15. Disconnect the wiring harness connectors located
under the steering column then remove combination
switch and SRS coil assembly.

Installation
1. Align the setting marks made when removing then
install steering wheel.
Refer to the adjustment method in case a mark is
not attached in this section.
NOTE: Confirm SRS and Horn harness connector is
fixed by the steering wheel.
RTW33BSH000601

CAUTION: Never apply force to the steering wheel in
direction of the shaft by using a hammer or othe
r
impact tools in an attempt to remove the steering
wheel. The steering shaft is designed as an energy
absorbing unit.
2. Tighten the steering wheel fixing nut to the specified
torque.
Torque: 31 - 39 N





m (3.2 – 4.0 kg





m/23 - 29 lb ft)
3. Support the inflator module and carefully connect the
SRS connector and horn lead. (with SRS air bag)
060R300041
4. Connect the horn leads at center of wheel. (without
SRS air bag)
NOTE: Horn leads is letting a bracket top pass.
(Plastic type steering wheel only)



RTW43BSH000301

POWER-ASSISTED STEERING SYSTEM 3B-41

5. Push the born pad area 1-4.
Tighten the born pad fixing screw to the specifed
torque (without SRS air bag)
Torque: 2 - 4 N




m (0.2 – 0.4 kg




m/17 - 35 lb ft)
NOTE: A horn pad is not struck at the time o
f
attachment.



RTW43BSH000401
6. Align the each snap stud of driver air bag to the hole
of steering wheel. (with SRS air bag)
060R300030


060R300020
7. Push the SRS air bag area1 and area2. At that time
confirm the audible noise of each stud. (with SRS ai
r
bag)
060R300036
8. Enable the SRS (Refer to "Enabling the SRS" in this
section). (with SRS air bag)
9. Connect the SRS connector. (with SRS air bag)
10. Connect the battery "-" terminal cable. (with SRS ai
r
bag)
11. Turn the ignition switch to "ON" while watching
warning light and check the light should flash 7 times
and then go off. If lamp does not operate correctly,
refer to Restraints section.

POWER-ASSISTED STEERING SYSTEM 3B-47

6. Install the driver knee bolster assembly.
7. Install the steering lower cover and engine hood
opening lever.
8. Install the steering wheel and align the setting
marks.
Refer to the adjustment method in case a mark is
not attached in this section.
NOTE: Confirm SRS and Horn harness connector is
fixed by the steering wheel.
RTW33BSH000601
CAUTION: Never apply force to the steering wheel in
direction of the shaft by using a hammer or othe
r
impact tools in an attempt to remove the steering
wheel. The steering shaft is designed as an energy
absorbing unit.
9. Tighten the steering wheel fixing nut to the specified
torque.
Torque: 31 - 39 N




m (3.2 – 4.0 kg




m/23 - 29 lb ft)
10. Support the inflator module and carefully connec
t
the SRS connector and horn lead. (with SRS air
bag)
060R300010

11. Connect the horn leads at center of wheel. (without
SRS air bag)
NOTE: Horn leads is letting a bracket top pass.
(Plastic type steering wheel only)



RTW43BSH000301
12. Push the born pad area 1-4.
Tighten the born pad fixing screw to the specifed
torque (without SRS air bag)
Torque: 2 - 4 N





m (0.2 – 0.4 kg





m/17 - 35 lb ft)
NOTE: A horn pad is not struck at the time o
f
attachment.



RTW43BSH00040

POWER-ASSISTED STEERING SYSTEM 3B-53

825RS048
4. Install the driver knee bolster assembly.
5. Install the steering lower cover and engine hood
opening lever.
6. Install the steering wheel and align the setting marks.
Refer to the adjustment method in case a mark is no
t
attached in this section.
NOTE: Confirm SRS and Horn harness connector is
fixed by the steering wheel.
RTW33BSH000601

CAUTION: Never apply force to the steering wheel in
direction of the shaft by using a hammer or othe
r
impact tools in an attempt to remove the steering
wheel. The steering shaft is designed as an energy
absorbing unit.
7. Tighten the steering wheel fixing nut to the specified
torque.
Torque: 31 - 39 N





m (3.2 – 4.0 kg





m/23 - 29 lb ft)

8. Support inflator module and carefully connect the
SRS connector and horn lead, then install inflato
r
module. (with SRS air bag)
060R300010
9. Connect the horn leads at center of wheel. (without
SRS air bag)
NOTE: Horn leads is letting a bracket type pass.
(Plastic type steering wheel only)



RTW43BSH000301

3B-54 POWER-ASSISTED STEERING SYSTEM

10. Push the born pad area 1-4.
Tighten the born pad fixing screw to the specifed
torque (without SRS air bag)
Torque: 2 - 4 N




m (0.2 – 0.4 kg




m/17 - 35 lb ft)
NOTE: A horn pad is not struck at the time o
f
attachment.



RTW43BSH000401
11. Align the each snap stud of driver air bag to the hole
of steering wheel. (with SRS air bag)
060R300030

060R300020
12. Push the SRS air bag area1 and area2. At that time
confirm the audible noise of each stud. (with SRS ai
r
bag)
060R300036
13. Enable the SRS (Refer to "Enabling the SRS" in this
section). (with SRS air bag)
14. Install driver knee bolster (reinforcement).
15. Install instrument panel lower cover, then install the
engine hood opening lever.
16. Connect the yellow 2-way SRS connector located
under the steering column. (with SRS air bag)
17. Connect the battery "-" terminal cable. (with SRS ai
r
bag)

System Inspection (with SRS air bag)
Turn the ignition switch to "ON" while watching warning
light.
The light should flash 7 times and then go off. If lamp
does not operate correctly, refer to Restraints section.

POWER-ASSISTED STEERING SYSTEM 3B-59

Check clearance between capsule and bracket. If must
be within 1mm (0.039 in).
431RW031

Column Universal Joint (between the
power steering unit and the steering shaft)
If the resistance is felt when checked by rotate the joint,
replace the lower second steering shaft.

Shaft Universal Joint (between the lower
second steering shaft and the second
steering shaft)
If the resistance is felt when checked by rotate the joint,
replace the second steering shaft assembly.

Tilt Mechanism
Tilt mechanism should moves smoothly.
While locked the tilt mechanism, be sure the steering
column latch securely by pushing the steering wheel
upward and downward.

Installation
1. Align the setting marks on the second steering shaft
and the steering column assembly (applied at
disassembly).
2. Connect the steering column assembly to the second
steering shaft. Tighten the bolts to the specified
torque.
Torque: 26 - 36 N




m (2.7 – 3.7 kg




m/20 - 27 lb ft)
3. Thread the steering column assembly through the
hole in the dashpanel. Temporarily tighten the
steering column and the second steering shaft fixing
bolt.
4. Connect the lower second steering shaft and the
second steering shaft. Tighten the universal joint
bolts to the specified torque.
Torque: 26 - 36 N




m (2.7 – 3.7 kg




m/20 - 27 lb ft)
5. Tighten the steering column fixing bolt (pedal brkt
side) to the specified torque (This bolt was
temporarily tighten in Step 3).
Torque: 18 -23 N




m (1.8 – 2.3 kg




m/13 - 17 lb ft)

6. Tighten the second steering shaft fixing bolt to the
specified torque (This bolt was temporarily tightened
in Step 3)
Torque: 18 -23 N




m (1.8 – 2.3 kg




m/13 - 17 lb ft)
7. Tighten the steering column fixing bolt (dashpanel
side) to the specified torque (This bolt was
temporarily tighten in Step 3).
Torque: 18 -23 N




m (1.8 – 2.3 kg




m/13 - 17 lb ft)
8. Install combination switch and SRS coil assembly.
After installation of combination switch assembly,
connect the combination switch wiring harness
connector and the SRS 2-way connector located
under the steering column.

3B-60 POWER-ASSISTED STEERING SYSTEM

9. Turn the SRS coil counter clockwise to full, return
about 3 turns and align the neutral mark. (with SRS
air bag)
CAUTION: When turning the SRS coil counte
r
clockwise to full, stop turning if resistance is felt.
Forced further turning may damage to the cable in
the SRS coil.
826RW014
10. When installing the steering column cover, be sure to
route each wire harness as illustrated so that the
harnesses do not catch any moving parts.
825RW017
Legend
(1) Steering Column Cover
(2) Starter Switch Harness
(3) Combination Switch Harness
(4) Inflator Module Harness

11. Install steering wheel and align the setting marks
made when removing.
Refer to the adjustment method in case a mark is
not attached in this section.
NOTE: Confirm SRS and Horn harness connector is
fixed by the steering wheel.
RTW33BSH000601

CAUTION: Never apply force to the steering wheel in
direction of the shaft by using a hammer or othe
r
impact tools in an attempt to remove the steering
wheel. The steering shaft is designed as an energy
absorbing unit.
12. Tighten the steering wheel fixing nut to the specified
torque.
Torque: 31 - 39 N




m (3.2 – 4.0 kg




m/23 - 29 lb ft)
13. Support the module and carefully connect the
module connector and horn lead, then install inflato
r
module.
NOTE: Pass the lead wire through the tabs on the
plastic cover (wire protector) of inflator to prevent lead
wire from being pinched.
14. Tighten bolts to specified torque.
Torque: 2 - 4 N




m (0.2 – 0.4 kg




m/17 - 35 lb in)
15. Install driver knee bolster (reinforcement).
16. Install instrument panel lower cover.
17. Install the engine hood opening lever.
18. Connect the yellow 2-way SRS connector and horn
lead located under the steering column.
19. Connect the battery "-" terminal cable. (with SRS ai
r
bag)

3B-62 POWER-ASSISTED STEERING SYSTEM

Supplemental Restraint System Steering Wheel & Column and
Associated Parts
Main Data and Specifications
Torque Specifications N

m (kg

m/lb ft)


This illustration is based on the RHD model.
RTW43BLF000301
Special Tools

ILLUSTRATION

TOOL NO.
TOOL NAME



5-8521-0016-0
(J-29752)
Steering wheel remover