Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1197

POWER-ASSISTED BRAKE SYSTEM

5C–55

Machining The Drum

If a drum is to be machined, only enough metal should
be removed to obtain a true, smooth braking surface. If
a drum does not clean-up when machined to a
maximum diameter, it must be replaced. Removal of
more metal will affect dissipation of heat and may cause

distortion of the drum.
After refinishing, replace any drum that exceeds a
maximum inside diameter of 296.5 mm (11.673 in). Do
not use a brake drum that is not within the specification.

Maximum inside diameter: 296.5 mm (11.673 in)

Wheel Cylinder Assembly (4

´2 Model)

Wheel Cylinder Assembly and Associated Parts

305RW003

EndOFCallout

Removal

1. Remove brake linings (1).

• Refer to Brake Lining and Associated Parts in this

section.

2. Remove brake pipe (4).

• Plug the opening in the line to prevent fluid loss

and contamination.

3. Remove bolts (3) and wheel cylinder (2).

Installation

1. Install wheel cylinder (2) and tighten bolts (3) to the

specified torque.

Torque: 10 N·m (8 lb ft)

2. Install brake pipe (4) and tighten the nut to the

specified torque.

Torque: 16 N·m (12 lb ft)

3. Install brake linings (1).

• Refer to Brake Lining Replacement in this

section.

• Bleed brake system. Refer to Hydraulic Brake in

this section.

Legend

(1) Brake Linings
(2) Wheel Cylinder

(3) Bolts
(4) Brake Pipe

5C–56

POWER-ASSISTED BRAKE SYSTEM

Disassembled View

305RS006

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Disassembly

1. Remove boot (1) and piston assembly (2).

2. Remove piston cup (3) from piston assembly (2).

3. Remove return spring (4) and bleeder (5) from

wheel cylinder (6).

Inspection and Repair

1. Make necessary parts replacement if wear,

damage, corrosion or any other abnormal condition
are found through inspection.
Check the following parts;

• Wheel cylinder body

• Cylinder bore

• Piston

• Return spring

• Bleeder

NOTE:  Replace the piston cups and boots each time
the wheel cylinder is overhauled. Discard these used
rubber parts and replace with new ones.

Reassembly

1. Lubricate the cylinder bore with clean rubber

grease.

305RS007

2. Install bleeder (5) to wheel cylinder (6).

Torque: 10 N·m (8 lb ft)

305RS008

Legend

(1) Boot
(2) Piston Assembly
(3) Piston Cup
(4) Return Spring
(5) Bleeder
(6) Wheel Cylinder

POWER-ASSISTED BRAKE SYSTEM

5C–57

3. Install new piston cups (3) on each piston so that

the flared end of the cups are turned to the inboard
side of the pistons.
Attach the return spring (4) and the boot (1) to the
piston.

305RS009

4. Apply DELCO silicone lube No. 5459912 (or

equivalent) to the piston and the inner face of the
boots.

5. Install piston assembly (2) to wheel cylinder (6).

5C–58

POWER-ASSISTED BRAKE SYSTEM

Main Data and Specifications

General Specifications

Torque Specifications

E05RW010

Rear drum brake

Type

Leading-trailing, non-servo

Drum inside diameter

295 mm (11.6 in)

Wheel cylinder diameter

22.22 mm (7/8 in)