Disassembly and Assembly

DISASSEMBLY
1. Remove right and left dust boots from wheel cylinder.





2. Remove piston, cup, spring and air bleeder screw and cap.

ASSEMBLY
1. Clean all parts in brake fluid. Check and replace faulty parts.
- Cup and boot for damage or fatigue
- Cylinder, piston and spring or damage or rust formation
2. Assembly is the reverse order of disassembly.
1. When installing the cup, use ST, apply brake fluid to the frictional surface for smooth installation and pay attention to cup direction.
2. STs are available in different sizes.





CAUTION:
- When replacing the repair kit, make sure that the sizes of cylinder and cup are the same as those which were replaced.
- Use only the tool of the correct size.





CAUTION: While assembling, be careful to prevent any metal chip, dust or dirt from entering the wheel cylinder.

3. Apply rubber grease to the boot inside as shown in Figure.
Grease:
NIGLUBE X-2 (Part No. 003606000)





CAUTION: Never use brake grease.

INSPECTION
1. If the inside surface of brake drum is streaked, correct the surface. And, if it is unevenly worn, taperingly streaked, or the outside surface of brake drum is damaged, correct or replace it.





2. Measure the drum inner diameter.
3. Measure the lining thickness.
Lining thickness:
Standard: 4.1 mm (0.161 inch)
Service limit: 1.5 mm (0.059 inch)
4. If the deformation or wear of back plate, shoe, etc. are notable, replace them.
5. When the shoe return spring tension is excessively weakened, replace it, taking care to identify upper and lower springs.