Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 692

5C–12 POWER ASSISTED BRAKE SYSTEM

Rear Axle Brake Hose

Rear Axle Brake Hose and Associated
Parts

352RW002

Legend

(1) Brake Pipe
(2) Clip
(3) Bolt
(4) Brake Pipe
(5) Hose

Removal

1. Raise the vehicle and support it with suitable safety

stands.

2. Remove wheel and tire assembly.
3. Clean dirt, grease, and other foreign material off the

hose fittings at both ends.

4. Disconnect brake pipe.
5. Remove clip.
6. Remove brake pipe.
7. Remove bolt.
8. Remove hose.

Installation

To install, follow the removal steps in the reverse order,
noting the following points:

1. Tighten the brake pipes to the specified torque

Torque: 16 N·m (12 lb ft)

2. Tighten the bolt to the specified torque.

Sems bolts

Torque: 13 N·m (113 lb in)

Flange bolts

Torque: 15 N·m (11 lb ft)

After installing the brake hoses, bleed the brakes as
described in this section.

5C–13

POWER ASSISTED BRAKE SYSTEM

Brake Pipe

Removal

1. Raise the vehicle and support it with suitable safety

stands.

2. Remove wheel and tire assembly as necessary.
3. Clean dirt, grease, and other foreign material off the

pipe fittings at both ends.

4. Remove brake pipe (1).

330RW001

5. Remove plastic clip (2).

330RW002

Installation

To install, follow the removal steps in the reverse order,
noting the following points:

1. Tighten the brake pipes to the specified torque.

Master cylinder side

Torque: 12 N·m (104 lb in)

Other

Torque: 16 N·m (12 lb ft)

After installing the brake pipes, bleed the brakes as
described in this section.

5C–14 POWER ASSISTED BRAKE SYSTEM

P & B (Proportioning and Bypass) Valve

P & B (Proportioning and Bypass)
Valve Sectional View

350RW001

Legend

(1) Master Cylinder (Secondary)
(2) Master Cylinder (Primary)
(3) Rear Brake
(4) Front Brake

The P&B valve contains two sections, each serving a
different function.
The proportioning section of the P&B valve proportions
outlet pressure to the rear brakes after a predetermined
rear input pressure has been reached.  This is done to
prevent rear wheel lock up on the vehicles with light rear
wheel loads. The valve has a pass feature which assures
full system pressure to the rear brakes in the event of front
brake system malfunction. Also full front pressure is
retained in the event of rear brake malfunction.
The combination valve has a pressure differential
warning switch which is designed to constantly compare
front and rear brake pressure from the master cylinder
and turn on the brake system warning light on the
instrument panel in the event of a front or rear system
malfunction. The valve and switch are so designed that
the switch will latch in the warning position once a
malfunction has occured. The only way the light can be
turned off is to repair the malfunction and apply a pedal
forced required to developed line pressure. The P&B
valve is not repairable and must be replaced as a
complete assembly.

Removal

1. The P&B valve is not repairable and must be replaced

as a complete assembly. Care must be taken to
prevent brake fluid from contacting any painted
surface. 

2. Remove hydraulic pipes (1) and plug (1) the pipes to

prevent the loss of fluid or the entrance of dirt.

3. Remove bolt (3).
4. Remove P&B valve (2).

350RW015

Installation

1. Install P&B valve (2).
2. Install bolt (3) and tighten the bolt to the specified

torque.

Torque: 13 N·m (113 lb in)

3. Install hydraulic pipes (1) and tighten the bolt to the

specified torque.

Torque: 16 N·m (12 lb ft)

4. After installing the brake pipes, bleed the brakes

refering to “Bleeding Brake Hydraulic System” in this
section.

5C–15

POWER ASSISTED BRAKE SYSTEM

Main Data and Specifications

Torque Specifications

E05RW001