TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Three locknuts (Appendix G, Item 70) Two O-rings (Appendix G, Item 218) Tiedown strap (Appendix G, Item 308) Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition • Hood raised and secured (TM 9-2320-280-10). • Battery ground cable disconnected (para. 4-73). General Safety Instructions Do not drain fluid when engine is hot. 8-25. POWER STEERING HYDRAULIC SYSTEM PRESSURE AND RETURN HOSE REPLACEMENT This task covers: a. Removal b. Installation a. Removal 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 Have drainage container ready to catch fluid. 1. Loosen two clamps (3) and disconnect return hose (8) from power steering pump (9) and hydro-boost (19). 2. Remove two locknuts (12), washers (13), and capscrews (14) from clamps (15) and control valve hose (16). Remove two clamps (15) from return hose (8). Discard locknuts (12). NOTE Perform step 4 for vehicles with new alternator support bracket configuration. 3. Remove locknut (6), washer (7), capscrew (2), spacer (4), two clamps (5), clamp (10), and return hose (8) from alternator bracket (1). Remove clamp (5) from return hose (8). Discard locknut (6). 4. Remove locknut (6), two washers (7), capscrew (2), two clamps (5), harness clamp (10), and return hose (8) from power steering lines bracket (11). Remove clamp (5) and tiedown strap (11.1) from return hose (8). Discard locknut (6) and tiedown strap (11.1). 5. Remove pressure hose (17) from hydro-boost (19) and steering gear (20). Remove two O-rings (18) from pressure hose (17). Discard O-rings (18). NOTE Removal and installation procedures are basically the same for all hydraulic system pressure and return hoses. This procedure covers the power steering pump to hydro-boost return hose and the steering gear to hydro-boost pressure hose. TM 9-2320-280-20-2 8-76 Change 3 b. Installation 1. Install two O-rings (18) on pressure hose (17) and connect pressure hose (17) to steering gear (20) and hydro-boost (19). 2. Connect return hose (8) to power steering pump (9) and hydro-boost (19) with two clamps (3).