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TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download

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8-25. POWER STEERING SYSTEM HYDRAULIC CONTROL VALVE MAINTENANCE (Cont'd) CAUTION • To ensure there is no load on the steering gear, position front wheels straight ahead before starting engine. Failure to do this may cause damage to the control valve. • Maintain power steering fluid level at all times while performing back flush procedure to prevent air from entering power steering system. Failure to do this may result in damage to equipment. 6. Start engine and allow to run for about two or three seconds and stop, check, and fill power steering reservoir. Repeat the process once. 7. Remove pipe plug (2) from control valve (7). 8. Install control valve elbow (1) on control valve (7). 9. Remove steering gear hose (4) from control valve fitting (3) and install on control valve elbow (1). 10. Remove control valve fitting (3) from control valve (7) and install pipe plug (2) on control valve (7). CAUTION • To ensure there is no load on the steering gear, position front wheels straight ahead before starting engine. Failure to do this may cause damage to the control valve. • Maintain power steering fluid level at all times while performing back flush procedure to prevent air from entering power steering system. Failure to do this may result in damage to equipment. 11. Start engine and allow to run for about two to three seconds and stop, check, and fill power steering reservoir. Repeat the process once. 12. Remove drain hose (5) from control valve elbow (6). 13. Remove steering gear hose (4) from control valve elbow (1). 14. Remove pipe plug (2) from control valve (7). 15. Install control valve fitting (3) on control valve (7). 16. Disconnect battery ground cables (para. 4-68). c. Inspection TM 9-2320-387-24-1 8-70 Change 1 1. Inspect elbows (6) and (1) for damage. Replace elbows (6) or (1) if damaged. 2. Inspect valve fitting (3) for damage. Replace valve fitting (3) if damaged. d. Installation NOTE Perform step 1 only if control valve was removed. 1. Install control valve (7) on bracket (13) with clamp (10). 2. Connect steering gear hose (4) to control valve elbow (6) and tighten clamp (16) to 30-40 lb-in. (3.4-4.5 N• m). 3. Connect fan clutch hose (15) to control valve fitting (3) and tighten clamp (14) to 30-40 lb-in. (3.4-4.5 N • m). 4. Connect power steering return line hose (8) to control valve elbow (1) and tighten clamp (9) to 30-40 lb-in. (3.4-4.5 N • m). 5. Connect time delay module connector (11) to control valve connector (12).