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1-59.1 POWER DRAIN UTILITY HYDRAULIC SYSTEM RESERVOIR
1-60 POWER SERVICE NO. 1 FLIGHT CONTROL HYDRAULIC SYSTEM RESERVOIR

TM-55-1520-240-23-1 UH-1H/V and EH-1H Aircraft Manual
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TM 55-1520-240-23-1 1-59.1 POWER DRAIN UTILITY HYDRAULIC SYSTEM RESERVOIR    (Continued) 1-59.1 3. Make  sure  UTILITY  RESERVOIR DEPRESSURIZE valve (4) and EMERG UTIL PRESS valve (5) are set to NORMAL. 4. Press and hold depressurization valve (7) on APU start module (8) until accumulators deplete to precharge. 5. Release valve (7). 6. Turn valve (4) to OPEN. NOTE Be sure to read correct scale on gauge according to whether ramp is fully up or fully down. 7. Press and hold LEVEL CHECK button (9) on MAINTENANCE PANEL (10).  Read reservoir fluid level on gauge (11). 8. Have helper operate test stand.   Turn on test stand (TM 55-4920-335-14 or TM 55-4920-373-14&P). 9. Have helper press and hold valve (7).  Press button (9) and read gauge (11). 10. When gauge (11) indicates EMPTY, release valve (7), and button (9). Turn valve (4) to NORMAL. 11. Shut down test stand. 12. Disconnect test stand return line (3) from utility RETURN connection (2). 13. Replace dust cover (1) on utility RETURN connection. FOLLOW-ON MAINTENANCE: Disconnect battery (Task 1-39). Close hydraulic connection access panel (Task 2-2). END OF TASK 1-231







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