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GROUP 1 STRUCTURE AND FUNCTION
1. OUTLINE
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The brakes are operated by a pressure compensated, closed center hydraulic system.
Flow is supplied by a fixed displacement, gear type brake pump.
BRAKE SYSTEM
The fixed displacement brake pump supplies flow to the cut-off valve for service brake circuit and
park brake circuits. It flows to three accumulator. The accumulator has a gas precharge and an
inlet check valve to maintain a pressurized volume of oil for reserve brake applications.
Oil through the accumulator flows to the brake valves. The brake valve is a closed center design,
dual circuit operated by a pedal.
Brake pump flow also goes to the parking brake solenoid valve in cut off valve.
The brake system contains the following components:
·Brake pump
·Parking brake solenoid valve in cut off valve.
·Cut-off valve
·Brake valve
·Accumulators
·Pressure switches
S
S
ECTION 4 BRAKE SYSTEM
4-1
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