Master Cylinder Assembly: Disassembly
- Remove mud and dirt from the surface of the brake master cylinder.
- Secure the master cylinder on a vise.
- Remove the pin with drift pin which secures the reserve tank to master cylinder and remove the reservoir tank and grommet.
- Remove the cylinder pin with magnetic pick-up tool while pushing in primary piston with a screwdriver that is wrapped in tape. See Fig 1 .
- Pry up the pawl and remove the piston retainer. See Fig 2
.NOTE: Hold piston retainer tight, because the piston may jump out from master cylinder.
- Extract the primary piston assembly and secondary piston assembly straight out, while taking care not to scratch the inner surface of the cylinder.
- Use brake fluid to wash the inside wall of the cylinder and the piston assembly.
- If any damage, deformation, wear, swelling, rust, and other faults are found on the primary piston assembly, secondary piston assembly, supply valve stopper, or gasket, replace the faulty part.CAUTION: The primary and secondary pistons must be replaced as complete assemblies. The service limit of the clearance between each piston and the master cylinder inner diameter is 0.0043" (0.11 mm). When handling parts, be extremely careful not to damage or scratch the parts, or let any foreign matter get on them.