TM 9-2350-256-20-1
UNIT MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
AUXILIARY HYDRAULIC PUMP TROUBLESHOOTING PROCEDURE
INITIAL SETUP:
Tools and Special Tools
References
Tool kit, general mechanic's (item 59, WP 0490 00)
WP 0416 00
Troubleshooting Procedure
Auxiliary Hydraulic Pump
Symptom
Auxiliary hydraulic system malfunctioning.
Malfunction
Main and hoist winches fail to operate.
Do step 1.
Insufficient or no auxiliary system oil pressure.
Do step 1.
Loss of auxiliary hydraulic pressure during operation. Do steps 2 and 3.
CORRECTIVE ACTION
1.
Ensure SYSTEM SELECTOR CONTROL lever is in the AUXILIARY or REFUEL position (not
MAIN position) as appropriate. If problem persists, go to step 2.
2.
Ensure APU emergency winch control valve lever is in the AUXILIARY POWER UNIT OPERATION
(open) position. If problem persists, go to step 3.
3.
Ensure power control lever is in the OFF position. If problem persists, go to step 4.
WARNING
Do not attempt to loosen or tighten hydraulic fittings or lines when system is pressurized. Severe injury
or death to personnel may result.
4.
Inspect all hydraulic hoses and connections for visible indication of leaks or damage. Replace hydraulic
hoses and tighten fittings as necessary (see WP 0416 00). If problem persists, notify Direct Support
Maintenance.
END OF WORK PACKAGE
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