TM 9-2350-256-34
INTERMEDIATE MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
MAIN WINCH CIRCUIT (MAIN HYDRAULIC SYSTEM) TROUBLESHOOTING PROCEDURE
INITIAL SETUP:
Test Equipment
References (cont.)
Gage (item 9, WP 0086 00)
TM 9-2350-256-10
Tester kit, hydraulic pump (item 20, WP 0086 00)
TM 9-2350-256-20
Tools and Special Tools
Tool kit, general mechanic's (item 34, WP 0086 00)
References
Troubleshooting Procedure
Main Winch Circuit (Main Hydraulic System)
Symptom
Main winch circuit (main hydraulic system) malfunctioning.
Malfunction
Main winch will not operate.
Do steps 1 thru 14.
Main winch pays in and out under no load, but will not pay in or out under load. Do steps 15 thru 21.
Main winch pays in but will not pay out.
Do steps 22 thru 24.
Main winch pays out but will not pay in.
Do steps 25 and 26.
Main winch creeps in either direction when in hold position. Do step 27.
Main winch will not hold load.
Do steps 28 and 29.
Insufficient main system oil pressure.
Do steps 30 thru 32.
Level winder not operating.
Do steps 33 thru 35.
Level winder not operating properly. Do step 36.
CORRECTIVE ACTION
CAUTION
Close APU emergency winch control valve for main hydraulic system operation.
1.
Attempt operation of hoist winch, boom, and spade.
a.
If hoist winch, boom, and spade operate, proceed to step 9.
0008 00-1
