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

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TM 9-2320-387-24-1 8-74 Change 1 8-27. POWER STEERING SYSTEM BLEEDING This task covers: Bleeding 1. Ensure engine is shut off (TM 9-2320-387-10) and turn wheels all the way to the left. 2. Add power steering fluid (TM 9-2320-387-10) to FULL COLD level on reservoir. Leave reservoir cap off. 3. Raise front wheels off ground (para. 8-2). 4. Turn steering wheel left and right, holding wheels at steering stops for five seconds, for at least 40 times. NOTE • Power steering fluid must be free of bubbles and foam. If bubbles or foam are noted, it could be an indication of a loose connection or leaky O-ring. • Fluid with air in it will have a milky appearance. Air must be eliminated from system before normal steering action can be obtained. 5. Check power steering fluid level (TM 9-2320-387-10). If any bubbles are seen, repeat step 4. 6. Start engine (TM 9-2320-387-10) and with engine idling, add power steering fluid (TM 9-2320-387-10) if necessary. Install reservoir cap. 7. Turn wheels to center, shut off engine, and lower front wheels to ground (para. 8-2). 8. Start engine (TM 9-2320-387-10) and run engine for two or three minutes, turning wheels left and right. NOTE If pump is noisy, recheck hoses for possible contact with vehicle body or engine. If no contact is found and noise continues, turn engine off and repressurize system by following steps 9 and/or 10. 9. Remove reservoir cap. Wait for system to cool. Reinstall reservoir cap. Start engine (TM 9-2320- 387-10) and check pump for noise. If noise is still present, continue to step 10. If noise stopped, proceed to step 11. 10. Turn engine off (TM 9-2320-387-10). Remove fluid from reservoir using a suction device. Refill reservoir with clean, cool fluid. Install reservoir cap. Start engine (TM 9-2320-387-10) and check pump for noise. If noise is still present, replace power steering pump (para. 8-23). 11. Turn engine off (TM 9-2320-387-10). FOLLOW-ON TASKS: • Check power steering fluid level (TM 9-2320-387-10). • Lower and secure hood (TM 9-2320-387-10). • Operate vehicle and check for proper steering operation (TM 9-2320-387-10). Bleeding INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Personnel Required One mechanic One assistant Manual References TM 9-2320-387-10 TM 9-2320-387-24P Equipment Condition Hood raised and secured (TM 9-2320-387-10). Maintenance Level Unit