REMOVING AND INSTALLING BRAKE MASTER CYLINDER Draw off brake fluid in tank with a syringe reserved exclusively for use with brake fluid. Pull off plug. Pull off clutch hydraulic hose (1). Installation: Bleed brakes - see 34 00. 34 00 000 | |
Unscrew brake pipes (2 and 3). | |
Pull off tank. Unscrew mounting screws (4 and 5). Installation: Check rubber seal and connections. | |
Installation: Check rubber ring (7). Vacuum cannot be built up, if the seal is not perfect. | |
Description of Tandem Brake Master Cylinder Operation: Operating the brake pedal moves pistons (1 and 4) forward. Primary cups (2 and 5) run past compensating bores (3 and 6). Now there is equal pressure in chambers (A and B). Dual Circuit System: Chamber (A) is for front left and right. Chamber (B) is for rear left and right. Brake pedal travel will be considerably longer when a brake circuit fails, piston (4) will be forced into the pressureless chamber by piston (1) because of the pressure building up in chamber (A) and the first brake circuit can be used. If the first brake circuit fails, piston (1) in the pressureless chamber (A) is forced against the spring-loaded cap (7) and the second brake circuit can be used fully via chamber (B). |