TM 9--2350--292--20--1DRIVER’S CONTROLS OVERVIEW AND DIAGRAMS.0034 00THIS WORK PACKAGE COVERS:Driver’s Controls Overview And DiagramsThe driver’s controls consists of the vehicle steering wheel, transmission shifting lever, brake pedal, purge pump,accelerator pedal, and associated linkages.The vehicle steering wheel is connected by rods and linkage to a steering lever mounted on the steering valve bodyon the transmission. Movement of the steering wheel actuates the steering valve in the transmission controllingtrack movement for steering. The transmission shifting lever is connected to the transmission by rods and linkage.The shifting lever is used to select a desired driving range or direction (forward or reverse).(Old configuration) The brake pedal is connected by rods and linkage to left and right side brake levers which areconnected to the brakes. Also the brake pedal is connected by linkage to the steering linkage. When the brakepedal is applied it locks up with the steering. As a result, a hand brake is not needed. The brake pedal is assistedby an electrically operated pump, motor, relay, 80--amp circuit breaker, and associated wiring.(New configuration with brake modulation) The brake pedal is mechanically connected to the brake modulationvalve. When the brake pedal is depressed, the output pressure from the modulation valve increases, causing thebrake hydraulic cylinder rod assembly to move. As a result of this movement, the brake rods, linkage and cables tothe left and right side brake levers, which are connected to the vehicle’s brakes also move. The hydraulic cylinderrod assembly also controls the linkage that is connected to the steering linkage. When the brake pedal is fully de-pressed, it locks up the steering and as a result, a hand brake is not required. The brake pedal is assisted by ahydraulic pump and motor, pressure switches and regulators, relay and electrical power and associated wiring.The accelerator pedal is connected by linkage and throttle rods to the engine. Depressing the accelerator pedalincreases the flow of fuel to the engine and increases vehicle speed. The purge pump is an electrical/mechanicalpump mounted on the engine and is used to purge air from the fuel lines. The purge pump is connected in line withthe fuel lines and fuel pump. The purge pump is activated by turning on the engine preheat switch and the switchpanel.OLD CONFIGURATIONNEW CONFIGURATIONWITH BRAKE MODULATIONEND OF TASK0034 00--1/2 blank
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