TM 9-2350-256-20-1
UNIT MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
HOIST WINCH TROUBLESHOOTING PROCEDURE
INITIAL SETUP:
Tools and Special Tools
References (cont.)
Tool kit, general mechanic's (item 59, WP 0490 00)
WP 0409 00
WP 0410 00
References
WP 0411 00
WP 0289 00
WP 0416 00
Troubleshooting Procedure
Hoist Winch
Symptom
Hoist winch malfunctioning.
Malfunction
Do steps 1 thru 7.
Hoist winch fails to operate.
Hoist winch operates with difficulty.
Do steps 2 thru 7.
Hoist winch creeps or fails to hold load.
Do steps 8 thru 10.
CORRECTIVE ACTION
NOTE
The hoist winch troubleshooting procedures are performed using the main hydraulic system as a
fluid power source. If hoist winch operates using the main hydraulic but not the auxiliary hydraulic,
troubleshoot auxiliary hydraulic system. If hoist winch operates using the auxiliary hydraulic but not
the main hydraulic, troubleshoot main hydraulic system.
1.
Attempt operation of the hoisting boom, main winch, and spade. If the hoisting boom, main winch,
and spade do not operate, troubleshoot main hydraulic system and/or auxiliary hydraulic system. If the
hoisting boom, main winch, and spade operate go to step 2.
2.
Visually inspect for damage. If signs of mechanical failure exist, notify Direct Support Maintenance.
If no signs of mechanical failure exist, go to step 3.
WARNING
Do not attempt to loosen or tighten hydraulic fittings or lines when system is pressurized. Severe injury
or death to personnel may result.
3.
Inspect for any damaged or restricted hoses. Replace hoses as necessary (see WP 0416 00). If no
damaged or restricted hoses exist, go to step 4.
0031 00-1
