Master Cylinder
Disassembly
Remove master cylinder and place in a soft-jawed vise. Remove dust boot, retaining ring, stop washer and piston stop bolt. Withdraw primary piston assembly, secondary piston assembly and secondary return spring from bore. Remove check valve caps, tube seats, check valves and check valve springs. See Fig 1 .
Cleaning & Inspection
Check master cylinder bore and piston for wear or other damage. Replace as necessary. Check clearance between cylinder bore and piston. If clearance exceeds .006" (.15 mm), replace master cylinder assembly.
Reassembly
Reverse disassembly procedure. Before reassembly, apply rubber lube to all parts (except boots). When assembled, check that return port is not blocked by piston cup when piston is at return position.