Disassembly
1. Disassemble the assembly without disassembling the piston.
Examination
2. Check the inside of the cylinder body for corrosion and scoring, the piston collar for wear or deformation, and the piston for corrosion and scoring.
3. If the clearance between the cylinder and the piston exceeds the limit (0.15 mm), replace the master cylinder and/or piston assembly.
4. Apply a layer of working fluid (brake fluid DOT-3) on the inner surface of the master cylinder body and on the outer surface of the piston.
Installation
5. Replace the piston assembly.