Master Cylinder Overhaul

Fig. 7 Type 4, Composite Master Cylinder:

Fig. 8 Type 5, Composite Master Cylinder:

Fig. 9 Type 6, Composite Master Cylinder:

Fig. 10 Type 7, Composite Master Cylinder:

Fig. 11 Type 8, Composite Master Cylinder:

Fig. 12 Type 9, Composite Master Cylinder:

DISASSEMBLY


When disassembling the master cylinder, note the position of all parts as they are removed for proper installation.
1. Use a wooden stick or dowel to depress primary piston into cylinder bore.
2. With pushrod depressed, remove piston stopper bolt, then piston stopper ring.
3. Release pushrod, then remove piston assemblies. If secondary piston assembly is stuck in the bore, apply a light amount of compressed air to the secondary outlet port until piston assembly works free.

CLEAN & INSPECT


Examine reservoirs for foreign matter and check all passages for restrictions. If there is any indication of contamination or evidence of corrosion, service the hydraulic system as needed, then flush the entire system, refer to Brakes and Traction Control/Brakes/Service and Repair.


When disassembled, wash all parts in denatured alcohol or clean brake fluid. Use an air hose to blow out all passages, orifices and valve holes. Air dry and place parts on clean paper or lint-free cloth.
1. Check components for wear, damage, or corrosion. Replace as needed.
2. Check master cylinder bore for scoring, rust, pitting or etching. Replace as necessary.

ASSEMBLY


When assembling the master cylinder, use all parts contained in the repair kit. Coat all components in clean brake fluid, and place on a clean surface.