8.3. Main cylinder of coupling
1 – case;
2 – tank cover;
3 – tank;
4 – bolt, 13–17 N • m; 		5 – cover;
6 – pusher;
7 – lock ring of the piston;
8 – piston.

Dismantling

PERFORMANCE ORDER
1. Shoot the film of fastening of a popolnitelny tank, a tank and a cover.
2. Remove a lock ring of the piston.
3. Take a pusher and the piston.
Prevention

Do not damage a pusher and the surface of the main cylinder of coupling contacting to the piston.

Check

PERFORMANCE ORDER
1. Clear the dismantled details in solvent and blow all details and channels compressed air.
2. Check an internal part of the case of the cylinder for lack of a rust, pointed corrosion or development.
3. Check a piston cuff for lack of wear.
4. Check the piston for lack of a rust, pointed corrosion or development.
5. Check a tube of the hydraulic drive of coupling for absence of damage.
6. Measure the internal diameter of the main cylinder of coupling.

Prevention

You take measurement of internal diameter of the main cylinder of coupling in three sections (in the basis, the center and top) in two perpendicular directions.
7. If the gap between the piston and the cylinder exceeds admissible value, replace the main cylinder and / or the piston assembled.

Gap: 0,15 mm

Assembly

PERFORMANCE ORDER
1. Before assembly grease with liquid for coupling the piston and diameter of boring of the cylinder.

Liquid: DOT 3 brake fluid
2. Install the piston assembled.
3. Establish a lock ring of the piston.
4. Establish a pusher.
5. Establish a tape of fastening of a popolnitelny tank, a tank and a cover.