2007 ISUZU KB P190 Front suspension

4C1-64 FRONT WHEEL DRIVE
4× 2 Model
1. WANDERS AND PULLS

Checkpoint Trouble Cause Countermeasure


Adjust the wheel bearing
preload

Too tight

NG


Adjust the front alignment

Front alignment

Incorrect


Steering unit

Tighten or replace

Loose or worn

NG
NG

Suspension

Tighten or replace


Replace or adjust the inflation


Front or rear suspension parts
loose or broken


Tire

W orn or improperly inflated

OK NG
NG
OK
OK
OK

W heel bearing preload




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ISUZU KB P190 2007

4C1-68 FRONT WHEEL DRIVE
5. WANDERS AND PULLS
Checkpoint Trouble Cause Countermeasure


Adjust the wheel bearing
preload

Too tight

NG


Adjust the front alignment

Front alignment

Incorrect


Tighten or replace

Steering unit

Loose or worn

NG
NG
OK
OK

Tighten or replace


Replace or adjust the inflation


Suspension

Front or rear suspension parts
loose or broken


Tire

W orn or improperly inflated

NG
NG
OK
OK

W heel bearing preload




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ISUZU KB P190 2007

5B-4 ANTI-LOCK BRAKE SYSTEM
4×
××
×
2 (Except High Ride Suspension) Front Wheel Speed Sensor N⋅m (kgf ⋅m/lb ⋅ft)







RTW 55ALF000301

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ISUZU KB P190 2007

ANTI-LOCK BRAKE SYSTEM 5B-5
4×
××
×
2 High Ride Suspension, 4 ×
××
×
4 Front Wheel Speed Sensor N⋅m (kgf ⋅m/lb ⋅ft)







RTW 55ALF000101

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ISUZU KB P190 2007

5B-8 ANTI-LOCK BRAKE SYSTEM
Front Wheel Speed Sensor
Front Wheel Speed Sensor and Associated Parts
4×
××
×
2 (Except High Ride Suspension)







RTW 55ALF000401
Legend
(1) Connector Portion
(2) Front Speed Sensor Assembly
(3) Bolt: Cable to Knuckle


(4) Bolt: Sensor to Knuckle
(5) Nut: Cable to Upper Link


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ISUZU KB P190 2007

ANTI-LOCK BRAKE SYSTEM 5B-9
4×
××
×
2 High Ride Suspension, 4 ×
××
×
4







RTW 55ALF000201
Legend
(1) Connector Portion
(2) Front Speed Sensor Assembly
(3) Bolt: Cable to Knuckle


(4) Bolt: Sensor to Knuckle
(5) Bolt: Cable to Upper Link
Removal
1. Remove speed sensor connector at connector
portion.
2. Remove sensor fixing bolt (4).
3. Remove cable fixing bolts and nut (4 ×2).
4. Disconnect the arrow mark locks of the cable clips.
5. Remove the speed sensor assembly.
Inspection and Repair
1. Check the speed sensor head for presence of
foreign materials; remove any dirt, etc.
2. Check the head for damage; replace speed senso
r
if necessary.
3. Check the speed sensor cable for short or open circuit, and replace with a new one if necessary.
To check for cable short or open, bend or stretch the cable while checking for continuity.

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ISUZU KB P190 2007

ANTI-LOCK BRAKE SYSTEM 5B-15
411R300006
Legend
(1) Hub and Disc
(2) Sensor Rotor


(3) Press
3. Measure the gap “A” at 4 points at intervals of 90 °
(degrees).
Confirm that the gap “A” should be within the
specified range.
Range

Type A
4 × 2 (Except High Ride
Suspension) 7.0
− 7.4 mm
(0.276 − 0.291 in)
4 × 4
4 × 2 High Ride Suspension 7.2
− 7.6 mm
(0.283 − 0.299 in)

411R300016
4. Install the hub and disc assembly. (Refer to the
section Front wheel Drive).


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ISUZU KB P190 2007

5C-22 BRAKES
RTW 35CSH001001

•
••
•
Operation
1) Outline
W hen the LSPV (Load Sensing Proportioning Valve) detects a change in load weight, the load sensing spring
stretches.
Its reaction force is transmitted to the bottom of the load sensing valve to secure an optimum rear wheel cylinde
r
fluid pressure break point in proportion to the actual load
weight.
Besides, if the front brake system should fail, the device is designed to prevent the master cylinder fluid pressure from
decreasing and to apply it directly to the rear wheel cylinde
r
to obtain a sufficient braking performance.

RTW 35CSH001101

2) Bellow cutting point.
The Force (F) keeps the main piston (1) the rest position. The inlet pressure (A) and outlet pressure (B) are the same
as well as the inlet pressure (C) from front master cylinder.
The bypass piston (2) is kept on rest position by equilibrium
of the pressures (A) and (C) and the bypass spring load (3).

RTW 35CSH001201
3) Cutting point.
The cutting point is given by relation between force (F), that is the load applied by suspension of the vehicle and the
main piston area (1). The cutting point is achieved when the
force generated by hydraulic pressure is upper than the
force (F) given by the load suspension. The main piston (1)
moves from the rest position closing the valve. In this
moment the inlet pressure (A) is upper than the outlet
pressure (B). The bypass piston (2) continues on the rest
position by equilibrium of (A) and (C) pressure.


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ISUZU KB P190 2007