1.22 HYDRAULICS Single circuit brake pressure servo valve (MICO) (10) NOTE: Fitted to Machines up to S/No.51200471 only. The brake pressure servo valve can be either single or dual depending on the model of the machine. The operation of the servo valve is proportional to brake pedal movement. When the brake pedal is pressed, the valve (10) allows pressure in the accumulator (11) to apply the brakes. When the brake pedal is released, the valve (10) closes the pressure line from the accumulator (11) and diverts brake pressure from the brake units to the hydraulic tank (1), releasing the brakes.
Specification Brake pressure at A 44 bar (640 psi) Servo Valve - Single circuit brake pedal P Pressure supply from Accumulator (11) T Return to Hydraulic Tank (1) A Supply to Brakes on Front (14) and Rear (18) Axles Dual circuit brake pressure servo valve (MICO) (10) NOTE: Fitted to Machines up to S/No.51200471 only. With a dual brake servo valve (10), the front and rear brakes are operated independently of each other by separate feed and return lines from the servo valve.
Specification Brake pressure at A (not shown) 44 bar (640 psi) Servo Valve - Dual circuit brake pedal P Pressure supplies from Accumulators (11) T Return from Hydraulic Tank (1) A (not shown) - Supply to Brakes on Front (14) and Rear (18) Axles