Withdrawal
1. Remove the wheel and tire, and then remove the brake drum.
2. After unscrewing the nut, remove the rear hub together with the brake drum.
3. Remove both compression and compression springs.
4. Remove blocks and a regulator as a whole.
Examination
1. Measure the inner diameter of the brake drum. Measure the radial runout of the brake drum with a dial indicator.
Norm | limit value | |
Inner diameter | 228.6 mm | 230.6 mm |
(2 l engine) | 225 mm | 227 mm |
Ovality of the brake drum | — | 0.015 mm |
2. Measure the thickness of the brake lining on the block.
Norm | limit value | |
Brake lining thickness | 4.45mm | 1.5mm |
(2 l engine) | 5.89 mm | 0.8mm |
3. Check up on correct contact of brake overlays and a brake drum.
4. Check the outer part of the brake cylinder for excessive corrosion and defects.
5. Check the brake platter for wear and damage.
Installation
1. Lubricate the following areas with the recommended lubricant:
- Contact surfaces of pads and platter
- Contact surfaces of pad and mounting plate
- Recommended lubricant is SAE J310 Multipurpose Grease, NLGI No. 2
2. Establish a spring finger of a block.
3. Assemble the return spring with the shortened pusher.
Warning. The split pin and hub cap must not be reused.
4. After assembling all parts of the brake drum, pull the parking brake lever towards you several times.
Replacing the wheel brake cylinder
1. Remove the brake shoe.
2. Disconnect the brake pipeline.
3. Remove the wheel brake cylinder assembly.
4. Remove the boot (dust cover).
5. Remove the piston and piston collar.
6. Remove the return spring.
7. Before assembling the wheel brake cylinder, check the following items.
- 1) Check cylinder and piston for wear, damage or corrosion.
- Standard clearance between piston and cylinder - 0.039-0.089 mm
- 2) Check the cylinder body for defects and cracks.
- 3) Check the piston and pad contact surface for looseness.
8. Assembly is carried out in the reverse order of disassembly.
Note:
- 1) Clean the cylinder and internals with isopropyl alcohol before reassembly.
- 2) Apply a sufficient amount of brake fluid to the piston collar and cylinder.
- 3) When assembling, use new piston cups and anthers.
Warning. Take care not to lose the steel ball in the purge valve.