Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service 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
EndOFCallout
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)
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