1. Remove the brake shoes as described in Chapter 7.
2. Remove the brake reservoir filler cap, cover the filler neck with a piece of polyethylene to prevent loss of fluid during the following procedure. You can also install a clamp on the tubes between the rear axle and the bottom.
3. Loosen the brake pipe coupling on the back of the brake slave cylinder (photo).
4. Using a socket wrench, unscrew the mounting bolts of the working brake cylinder.
5. Unscrew the clutch of the brake pipeline, remove the working brake cylinder from the shield. Seal the end of the hydraulic pipe if necessary.
6. Clean the outer surface of the working brake cylinder, make sure that foreign objects do not fall into the opening of the hydraulic pipe.
7. Remove the rubber boots from the ends of the cylinder, remove the two pistons and the spring between them.
8. Check the condition of the channel, pistons and seals. If the cylinder is in satisfactory condition, a repair kit can be used, otherwise the cylinder must be discarded and a new assembly installed. When servicing the cylinder, use all parts included in the repair parts kit. Clean all metal parts in methanol if necessary, but never use benzene or similar solvents, then air dry or dry with a lint-free cloth.
9. Apply paste to the seals, install with the larger diameter facing the end of the piston.
10. Apply paste to pistons and cylinder bore. Install the piston at one end of the cylinder, then the spring and the other piston at the other end. Be careful not to turn the pistons in the cylinder as this can twist the seals.
11. Position the rubber boots on the pistons and into the grooves of the working brake cylinder.
12. Installation is carried out in the reverse order. Bleed the hydraulic system as described in Chapter 17.
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