TM-9-2320-273-34
TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1980
TM-9-2320-273-34 - Page 36 of 801
TM 9-2320-273-34
Table 2-10. Winch Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WINCH WILL NOT ROTATE EITHER DIRECTION IN HIGH OR LOW SPEED.
Step 1.
Check to see that PTO is engaged.
a.
Make sure that PTO shift lever is in fully engaged position; then place your hand
on hydraulic pump to find out if it is being driven. (Observe pump noise or
vibration. )
b.
If PTO is not operating, refer to table 2-11. If PTO is operating, go to step 2.
Step 2.
Check oil level in tank.
a.
If oil level is low, add oil. (Refer to LO 9-2320 -273-12.)
b.
If problem remains, go to step 3.
Step 3.
Check hydrauIic system.
a.
Perform test of hydraulic system (para 20-13) and repair, as necessary.
b.
If problem remains, go to step 4.
Step 4.
Check for dirty inlet strainer.
a.
Remove and clean strainer. (Refer to TM 9-2320 -273-20.)
b.
If problem remains, go to step 5.
Step 5.
Mechanical failure in winch.
Disassemble (para 20-3) and make necessary repairs (para 20-4 through 20-10, as
applicable). Reassemble (para 20-11).
2.
WINCH WILL NOT UNSPOOL CABLE.
Step 1.
Check to see if pilot orifice in winch brake valve is plugged.
a.
Clean orifice (para 20-14).
b.
If problem remains, go to step 2.
Step 2.
Check to see if control valve is shifting.
Make sure that handle is tight on valve spool.
2-20
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