Brakes (Hydraulic system): Description and operation

Hydraulic system

A brake fluid loss switch is fitted to the master cylinder A pressure reducing valve (PRV), fitted to the RH reservoir filler cap. The switch is wired to a warning bulkhead in the engine compartment, maintains the light on the vehicle fascia and will illuminate braking balance, see J6322. Pressure to the rear momentarily when ignition is switched on and calipers is regulated by the PRV, this valve is of the indicates that the warning circuit is functioning failure by-pass type allowing full system pressure to correctly. A hydraulic failure in the system will result in the rear brake calipers in the event of a front fluid loss, causing the warning light to illuminate. (secondary) circuit failure.

A. Primary circuit B. Secondary circuit C. Pressure reducing valve (PRV)

1. LH rear brake caliper
2. T-connector
3. RH rear brake caliper
4. Brake servo
5. Master cylinder and reservoir
6. LH front brake caliper
7. RH front brake caliper