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Figure 28. Piston Pump and Pump Control Valve.
Figure 31. Location of Parking Brake.

Maintenance Manual For Motorized Road Grader Model 120M - 1
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TM 5-3805-293-23-1
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BRAKING AND HYDRAULIC FAN SYSTEM CONTINUED
2. When the brake pedal is depressed, the service brake control valve sends high pressure hydraulic oil to the
system. Two brake accumulators in the brake system maintain brake system pressure when the brake and the
hydraulic fan pump is not supplying oil.
Figure 29. Service Brake Pedal and Control Valve.
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Figure 30. Service Brake Inside Housing.
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