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 |  TM 9-2320-285-24-1 1-29. ACCESSORIES 1. WINDSHIELD WIPER.  Single wiper arm and blade, controlled by WIPER control located at front instrument panel; mounted at center of windshield, driven by pneumatic-operated motor assembly. 2. WINDSHIELD WASHER. Applies two streams of washer solvent to windshield; operation of WASHER button, located at front instrument panel, causes washer pump and reservoir, mounted on engine compartment rear grille, to deliver solvent to two washer nozzles located below windshield. 3. CAB HEATER. Uses hot engine coolant and electric motor-driven blower to heat cab. Operation of defroster control allows cab heater air to be directed through defroster vents to windshield. In warm weather, with temperature control pushed in fully (no heat), operation of fresh air control allows outside air, entering through cab vents, to circulate through cab. 1-30. FIFTH WHEEL HYDRAULIC SYSTEM 1. HYDRAULIC PUMP. Located at right hand side of transmission, supplies hydraulic oil to fifth wheel control valve. 2. POWER TAKE-OFF. Located at right hand side of transmission, drives hydraulic pump; controlled by PTO control, located at right corner instrument panel. 3. FIFTH WHEEL CONTROL VALVE. Regulates flow of hydraulic fluid to fifth wheel hydraulic cylinders. 4. FIFTH WHEEL HYDRAULIC CYLINDERS. Mounted to rear chassis and fifth wheel boom, raise and lower fifth wheel boom. 5. HYDRAULIC RESERVOIR. Mounted on chassis, behind fuel tank at left hand side of vehicle, supplies hydraulic fluid to fifth wheel hydraulic system. 1-14 | 
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