Isuzu KB P190. Manual — part 186

BRAKES 5C-45

REAR DRUM BRAKE ASSEMBLY

DISASSEMBLY

First, disassemble the brake drum. Then disassemble the rear brake assembly.
Refer to the “REAR AXLE” section for the brake drum disassembly procedure.

RTW75CMF001001

MAJOR COMPONENTS

Disassembly Steps

1. Spring; adjuster

2. Ring; Adjuster lever

3. Lever; adjuster

▲ 4. Spring; Shoe hold

5. Pin; Shoe hold

▲ 6. Spring; Shoe to shoe, lower

7. Adjuster assembly

8. Spring; shoe to shoe, upper

9. Shoe; leading

10. Shoe; trailing
11. Spring; lever return
12.

Retainer

13. Washer; lever
14. Lever; parking
15. Bolt; wheel cylinder
16. Wheel cylinder assembly
17.

Cover

18. Back plate

MINOR COMPONENTS

Disassembly Steps
Wheel Cylinder Assembly

19. Piston assembly
20. Cup; piston
21. Boot; piston

22. Return spring
23. Cap; bleeder
24.

Bleeder

5C-46 BRAKES

RUW55CSH000401

Important Operations

4. Spring; shoe hold
Push the shoe hold spring toward the brake shoe and hold it
(1). Rotate the spring to remove it from the shoe hold pin (2).

6. Spring; shoe to shoe, lower
Slide the brake shoes and lower spring toward the ground.
Remove the lower spring.

INSPECTION AND REPAIR

Make necessary correction or parts replacement if wear damage or any other abnormal conditions are found
through inspection.

• Brake drum
• Back plate
• Brake lining
• Wheel cylinder body
• Piston
• Piston cup
• Return spring

Visual check

Inspect the following parts for wear scuffs, scratches,
corrosion, stains, deterioration, or other abnormal conditions.

Thickness of the Brake Lining

Thickness mm

(in)

standard (T)

Limit (t)

4

×2, 4×4

5.0 (0.197)

1.0 (0.039)

BRAKES 5C-47

Clean wheel Cylinder Parts

Always use clean brake fluid to clean wheel cylinder parts.
Note:
Do not use mineral based cleaning solvents such as
gasoline, kerosene, acetone, paint thinner, or carbon
tetrachloride.

Piston Cups

Inspect the piston cups for wear, distortion, fatigue or other
abnormal conditions.

Measuring the Brake Drum

mm (in)

Standard

Limit

Inside diameter

254 (10.000)

255.5 (10.059)

4

×2

(Except HIGH

RIDE)

Run out

0.08 (0.003)

0.15 (0.006)

Inside diameter

295 (11.614)

296.5 (11.673)

4

×2

(HIGH RIDE)

4

×4

Run out

0.08 (0.003)

0.15 (0.006)

5C-48 BRAKES

REASSEMBLY

RTW75CMF000601

MINOR COMPONENTS

Reassembly Steps
Wheel cylinder Assembly

▲ 1. Piston assembly
2.

Cup;

piston

3.

Return

spring

4.

Boot;

piston

▲ 5. Bleeder
6.

Cap;

bleeder

MAJOR COMPONENTS

Reassembly Steps

7.

Back

plate

8.

Cover

▲ 9. Wheel cylinder assembly
▲10. Bolt; wheel cylinder
▲11. Shoe; leading
▲12. Lever; parking
▲13. Washer; lever
▲14. Retainer
15. Spring; lever return

▲16. Shoe; trailing
▲17. Spring; shoe to shoe, upper
▲18. Adjuster assembly
19. Spring; shoe to shoe; lower
▲20. Lever; adjuster
▲21. Ring; Adjuster lever
▲22. Spring; shoe hold
▲23. Pin; shoe hold
24.

Spring;

adjuster