Brakes Construction
When the foot brake pedal is depressed, hydraulic pressure is developed in the master cylinder to actuate pistons (two in front and four in rear).
The master cylinder is a tandem master cylinder. Three (or two) brake pipes are connected to the master cylinder and they make two independent circuits. One connects front brakes (right and left) and the other connects rear brakes (right and left).
The load sensing proportioning valve (LSPV) the proportioning and bypass (P & B) valve is included in these circuits between the master cylinder and the rear brake.
In this brake system, the disc brake type is used for the front wheel brake and a drum brake type (leading/trailing shoes) for the rear wheel brake.
The parking brake system is mechanical. It applies brake force to only rear wheels by means of the cable and mechanical linkage system. The same brake shoes are used for both parking and foot brakes.
If any hydraulic component is removed or brake line disconnected, bleed the brake system. The torque values specified are for dry, unlubricated fasteners.
The figures show left-hand steering vehicle.
[A]: Vehicle without ABS and LSPV 1. Master cylinder 4. Proportioning and bypass valve
[B]: Vehicle with LSPV 2. 5-way joint (4-way joint) 5. Hydraulic unit
[C]: Vehicle with ABS 3. LSPV (Load Sensing Proportioning Valve) F: Forward