TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM9-2320-387-24-l l-27. STEERING CONTROL SYSTEM OPERATION The steering system is identical for both models covered in this manual. Major components of the steering system are: 0 A 0 B 0 C 0 D 0 E 0 F HYDRAULIC CONTROL VALVE - Directs hydraulic fluid to provide required pressure to actuate and deactuate fan clutch as required by engine temperature. Hydraulic pressure is supplied by power steering pump. HYDRO-BOOSTER - Converts hydraulic power from the steering pump to mechanical power to the master cylinder, providing power assist during braking. POWER STEERING COOLER - Is part of oil cooler which directs power steering fluid through a series of fins or baffles so outside air can dissipate excess heat before the fluid is recirculated through the steering system. SERPENTINE BELT - Transmits mechanical driving power from crankshaft drive pulley to steering pump pulley which drives the steering pump. OIL RESERVOIR AND STEERING PUMP - Combined in one unit, the reservoir serves as an oil filling point and the pump supplies the oil under pressure throughout the steering system. FAN CLUTCH - Hydraulically-actuated by pressure from hydraulic control valve to control operation of fan. Hydraulic pressure is supplied by power steering pump. 1-35