TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 REFERENCE INFORMATION STEERING SYSTEM Check hydraulic hoses, power steering pump, power steering cooler, hydraulic control valve, hydro-boost unit, steering gear, fan shroud, and fan clutch. See hose replacement procedures (refer to para 8-25). Check power steering cooler for bent fins or any other airflow restrictions. Straighten fins or replace power steering cooler (para. 8-28) if damaged beyond repair. 1. With engine off, disconnect pressure hose from hydro-boost and connect tube and quick- disconnect to hydro-boost. NOTE Have drainage container ready to catch fluid. 2. Connect adapter and quick-disconnect to pressure hose. 3. Connect hose from valve on power steering analyzer to tube and quick-disconnect on hydro-boost. 4. Connect hose from gauge side of power steering analyzer to adapter and quick- disconnect on pressure hose. 5. Loosen hose clamp and remove cooler hose from return tube on steering gearbox. 6. Plug hose with plug or bolt (3/8 in. or 10 mm dia.) and secure with hose clamp. 7. Connect bypass hose to tube on steering gearbox and secure with hose clamp. (continued on page 2-469) HOSE (GAUGE SIDE) HOSE (VALVE SIDE) GAUGE POWER STEERING ANALYZER ADAPTER/QUICK- DISCONNECT PRESSURE HOSE COOLER HOSE BYPASS HOSE HOSE CLAMP BOLT/PLUG RETURN TUBE STEERING GEARBOX HOSE CLAMP TUBE/QUICK- DISCONNECT HYDRO-BOOST VALVE Change 2 2-468.1