Front suspension ISUZU KB P190 2007 Workshop User Guide

FRONT ALIGNMENT 3A-9

RTW 53ASH000201
FRT Buffer clearance (Reference Data) mm(in)

4×2 (Except high ride suspension)
25.9(1.02)


RTW 340SH000101-X

RR Buffer clearance (Reference Data)
mm(in)
4×2 (Except high ride suspension)
82 (3.23)



MAXIMUM STEERING ANGLE
4
×2 (Except high ride suspension)
Outside wheel 33.5°
Inside wheel 37.1°


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ISUZU KB P190 2007

3A-10 FRONT ALIGNMENT
Alignment for 4×
××
×
2 (High Ride Suspension) and 4 ×
××
×
4
Caster and camber adjustment
The camber angle and caster angle can be adjusted by means of the camber shims and caster shims installed in
position between the chassis frame and fulcrum pins.
RTW 340LF001901

Legend
1. Camber shim
2. Caster shim
3. Upper link ASM LH
4. Lower link ASM LH
5. Adjusting cam



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3A-12 FRONT ALIGNMENT





Toe-in Adjustment
Measurement should be taken with the vehicle on a surface
plate.
If a surface plate is not available, toe-in should be checked
with the vehicle parked on a level floor.
1. Set front wheels to straight ahead position.
2. Align the toe-in gauge with center height of each wheel at front end.
3.
Apply center marks to each wheel, then take measurement
of distance A between the center marks on each wheel.
4. Slowly move the vehicle rearward until the center marks reach the rear end position.
5. Take measurement of distance B between the cente
r
marks at rear end.
The toe-in can be calculated with the following formula.
Toe-in = B - A
Toe-in mm (in)
4×2 (High ride suspension)
4×4 0
±2 (0 ±0.08)






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.
Lock Nut Torque N⋅m (kgf ⋅m/lb ⋅ft)
98 ±6.0 (10.0 ±0.6 / 72.3 ±4.3)

RTW 330SH000201

Trim Height
Trim Height : at Curb Weight
Trim height (Z) = A - B
mm (in)
Z
165±5 (6.5 ±0.20) (Philippine only)
140 ±5 (5.5 ±0.20) (Except Philippine)


MAXIMUM STEERING ANGLE
4
×2 (High ride suspension), 4 ×4
Outside wheel 32.8° (Philippine only)
Inside wheel 35.0° (Philippine only)
Outside wheel 32.1° (Except Philippine)
Inside wheel 34.4° (Except Philippine)

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ISUZU KB P190 2007

FRONT ALIGNMENT 3A-13

RTW 53ASH000301
FRT Buffer clearance (Reference Data) mm(in)

4×2 (High ride suspension), 4 ×4
29.7(1.17)

Adjustment
Adjust the trim height by means of the adjusting bolt on the
height control arms.
1. Check and adjust the tire inflation pressures.
2. Park the vehicle on level ground and move the front of the vehicle up and down several times to settle the suspension.

410RS001

3. Make necessary adjustments with the adjusting bolt on the
height control arms.




RTW 63ASH000101

RR Buffer clearance (Reference Data)
mm(in)
4×2 (High ride suspension), 4 ×4
80.0 (3.15)




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3B-8 POWER-ASSISTED STEERING SYSTEM
6. Fully close the shutoff valve. Record the highest
pressures.
・ If the pressure recorded is within 9800-10300 kPa
(100-105 kg/cm
2/1422-1493psi), the pump is
functioning within its specifications.
・ If the pressure recorded is higher than 10300 kPa
(105 kg/cm
2/1493psi), the valve in the pump is
defective.
・ If the pressure recorded is lower than 9800 kPa
(100 kg/cm
2/1422psi), the valve or the rotating
assembly in the pump is defective.
7. If the pump pressures are within specifications, leave the valve open and turn (or have someone
else turn) the steering wheel fully in both directions.
Record the highest pressures and compare with the
maximum pump pressure recorded in step 6. If this
pressure cannot be built up at either side of the
power steering unit, the power steering unit is
leaking internally and must be replaced.
8. Shut the engine off, remove the testing gauge.
9. Reconnect the pressure hose, check the fluid level and make the needed repairs.
10. If the problem still exists, the steering and front suspension must be thoroughly examined.

Maintenance
The hydraulic system should be kept clean, the fluid
level in the reservoir should be checked at regula
r
intervals and fluid added when required. Refer to
Recommended Fluids and Lubricants in General
Information section for the type of fluid to be used and
the intervals for filling.
If the system contains some dirt, flush it as described in
this section. If it is exceptionally dirty, the pump must be
completely disassembled before further usage. (The
steering unit cannot be disassembled.)
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. W hen 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.
・ Inspect gear for looseness or damage.
・ Inspect hoses to insure they are not touching an
y
other parts of the vehicle.
・ Inspect fluid level and fill to the proper level.

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 General Information to the proper level
and install the receiver cap.
4. W hen 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
W hen a power steering pump or unit 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 powe
r
steering fluid system, noisy and unsatisfactory operation
of the system may result.

Bleeding Procedure
W hen bleeding the system, and any time fluid is added
to the power steering system, be sure to use only powe
r
steering fluid as specified in General Information.
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 and support 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, set the steering wheel at the straight forward position after turning it to its full
steer positions 2 or 3 times, and stop the engine.
9. Check the fluid level and refill as required.
10. If the fluid is extremely foamy, allow the vehicle to settle for a few minutes, then repeat the above
procedure.

Flushing the Power Steering System
1. Raise and support 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.
Direct the line toward a large container to catch the
draining fluid.
3. W hile running the engine at idle, fill the reservoi
r
with new power steering fluid. Turn the steering
wheel in both directions. Do not contact or hold the
steering wheel to the wheel stops. This will cause
the pump to go to pressure relief mode, which ma
y
cause a sudden fluid overflow at the reservoir.


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SECTION 3C
FRONT SUSPENSION
TABLE OF CONTENTS

F
R O NT SU SPEN SION 3C -1
Main Data and Specifications .......................................................................................... 3C- 2
Torque Specififcations ..................................................................................................... .3C - 3
Special Parts Fixing nuts and Bolts ............................................................................ 3C- 3
Front Suspension ........................................................................................ ..................... 3C- 6
General Description . ............................................................................................. ....... 3C - 6
PAGE
F ro nt S usp en sio n
( 4 x2 Except High Ride Suspension) ........................................................................... 3C- 8
Front Suspension
(4x2 High Ride Suspension 4x4) ................................................................................ 3C- 30
Troubleshooting ................................................................... ....................................... 3C- 54

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3C-2 FRONT SUSPENSION
MAIN DATA AND SPECIFICATIONS
4×
××
×
2 (Except High Ride Suspension) Model
Front suspension Type Independent wishbone arms, coil spring
with stabilizer bar.
Coil spring Spring Rate 9.62 kg/mm (94.3 N/mm)
Type Gas-sealed, twin tube
Stroke 116.5 mm (4.59 in)
Compressed length 284.0 mm (11.18 in)
Front shock absorber
Extended length 400.5 mm (15.77 in)
Stabilizer bar Diameter 25.0 mm (0.98 in)

4×
××
×
2 (High Ride Suspension) Model
Front suspension Type Independent wishbone arms, torsion bar spring
with stabilizer bar.
Length 1,142 mm (44.96 in) Torsion bar spring
Diameter 29.0 mm (1.14 in)
Type Gas-sealed, twin tube
Stroke 121.0 mm (4.76 in)
Compressed length 257.0 mm (10.12 in)
Front shock absorber
Extended length 378.0 mm (14.88 in)
Stabilizer bar Diameter 26.0 mm (1.02 in)

4×
××
×
4 Model
Front suspension Type Independent wishbone arms, torsion bar spring
with stabilizer bar.
Length 1,142 mm (44.96 in) Torsion bar spring
Diameter 29.0 mm (1.14 in)
Type Gas-sealed, twin tube
Stroke 121.0 mm (4.76 in)
Compressed length 257.0 mm (10.12 in)
Front shock absorber
Extended length 378.0 mm (14.88 in)
Stabilizer bar Diameter 26.0 mm (1.02 in)


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FRONT SUSPENSION 3C-3
TORQUE SPECIFICATIONS
SPECIAL PARTS FIXING NUTS AND BOLTS
4×
××
×
2 (Except High Ride Suspension) Model N⋅m (kgf ⋅m/lb ⋅ft)


RTW 73CLF000101





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3C-4 FRONT SUSPENSION
4×
××
×
2 (Except High Ride Suspension) Model N⋅m (kgf ⋅m/lb ⋅ft)

RTW 440MF000201



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FRONT SUSPENSION 3C-5
4×
××
×
2 (High Ride Suspension) and 4 ×
××
×
4 Model N⋅m (kgf ⋅m/lb ⋅ft)





RTW 73CLF000201


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