Isuzu Rodeo UE. Service manual — part 124
5C–57
POWER–ASSISTED BRAKE SYSTEM
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
Legend
(1) Brake Linings
(2) Wheel Cylinder
(3) Bolts
(4) Brake Pipe
Removal
1. Remove brake linings (1).
f
Refer to “Brake Lining and Associated Parts ” in this
section.
2. Remove brake pipe (4).
f
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).
f
Refer to “Brake Lining Replacement” in this section.
f
Bleed brake system. Refer to “Hydraulic Brake” in
this section.
5C–58 POWER–ASSISTED BRAKE SYSTEM
Disassembled View
305RS006
Legend
(1) Boot
(2) Piston Assembly
(3) Piston Cup
(4) Return Spring
(5) Bleeder
(6) Wheel Cylinder
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 fond
through inspection.
Check the following parts;
f
Wheel cylinder body
f
Cylinder bore
f
Piston
f
Return spring
f
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
5C–59
POWER–ASSISTED BRAKE SYSTEM
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
equivalgmlent) to the piston and the inner face of the
boots.
5. Install piston assembly (2) to wheel cylinder (6).
5C–60 POWER–ASSISTED BRAKE SYSTEM
Main Data and Specifications
General Specifications
Rear drum brake
Type
Leading-trailing, non-servo
Drum inside diameter
295 mm (11.6 in)
Wheel cylinder diameter
25.4 mm (1 in)
Torque Specifications
E05RW010
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