TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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TM 9-2320-280-20-2 8-26. POWER STEERING SYSTEM HYDRAULIC CONTROL VALVE MAINTENANCE This task covers: a. Removal b. Back Flush Procedure c. Inspection d. Installation INITIAL SETUP: Tools Equipment Condition General mechanic’s tool kit: Battery ground cable disconnected (para. 4-73). automotive (Appendix B, Item 1) Hood raised and secured (TM 9-2320-280-10). Manual References General Safety Instructions TM 9-2320-280-10 Do not drain fluid when engine is hot. TM 9-2320-280-24P NOTE If referred here from TM 9-2320-280-20-1 troubleshooting instructions to perform back flush procedure, follow steps 1 through 4 and then proceed to b. WARNING Do not drain fluid when engine is hot. Severe injury to personnel will result. CAUTION Cover or plug all hoses and connections immediately after disconnection to prevent contamination. Remove all plugs prior to connection. NOTE Note location of hoses for installation. Have drainage container ready to catch fluid. 1. Loosen clamp (2) and disconnect power steering return line hose (1) from control valve elbow (4). 2. Loosen clamp (11) and disconnect fan clutch hose (12) from control valve fitting (10). 3. Loosen clamp (14) and disconnect steering gear hose (13) from control valve elbow (3). 4. Disconnect time delay module connector (6) from control valve connector (7). 5. Loosen clamp (5) and remove control valve (8) from bracket (9). b. Back Flush Procedure 1. Connect battery ground cable (para. 4-73). 2. Install steering gear hose (13) on control valve fitting (10). 3. Remove control valve elbow (4) from control valve (8) and install pipe plug (15) (NSN 4730-00-011- 2578) on control valve (8). 4. Install drain hose (16) (make from NSN 4720-01-186-2358,36 in. (91.4 cm) long) on control valve elbow (3). 5. Place drainage container underneath drain hose 8-78 (16) to catch fluid.