Checking the technical condition
Check the slave cylinder for fluid leaks.
Check the slave cylinder boot for damage.
Disassembly
Disconnect the connecting hose from the cylinder, remove the valve plate, spring, pusher and cover.
Carefully remove the dirt around the bore of the working cylinder under the piston.
Pic. 3.26. Removing the piston from the cylinder
Remove the piston from the cylinder by supplying the last compressed air (pic. 3.26).
Attention! Pre-cover the working cylinder with a rag, because. the piston may fly out with great force and cause injury.
Attention! Increase the air pressure gradually to prevent brake fluid from escaping and getting into your eyes or on your skin.
Checking the technical condition
Check the slave cylinder mirror for corrosion or damage.
Pic. 3.27. Checking the inner diameter of the cylinder with a bore gauge
Using a bore gauge, check the bore of the cylinder in three places (at the bottom, middle and top). If the clearance between the piston and the cylinder exceeds the limit, replace the slave cylinder (pic. 3.27).
Maximum allowable clearance between piston and cylinder: 0.15 mm.
Assembly
Pic. 3.28. Installing the piston in the cylinder
Apply DOT 3 or DOT 4 brake fluid to the inner surface of the slave cylinder and the outer surface of the piston and piston collar, and install the piston into the cylinder (pic. 3.28).
Install the valve plate, tappet and boot.
Installation
Pic. 3.29. Pusher axle
Apply grease of the required grade to the pusher axle (pic. 3.29).
Install the clutch slave cylinder and tighten the slave cylinder bolt.