TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 363 of 481
TM 9-2320-272-10
3-14
Change 2
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Table 3-1. Troubleshooting (Contd).
REAR WINCH
36. WINCH NOT OPERATING OR LACKS POWER.
Step 1. Check to see if tachometer indicates 1,275 rpm.
If not, pull hand throttle control all the way out.
Step 2. Check to see if transmission selector lever is in 1-5 (drive).
If not, place transmission selector lever in 1-5 (drive).
Step 3. Check to see if transfer case power takeoff shift lever is pushed back
to engaged position.
If not, push transfer case power takeoff shift lever back to engaged
position.
Step 4. Check to see if level wind lock knob is released.
If not, release level wind lock knob.
Step 5. Check level of hydraulic oil in reservoir (para. 2-24).
If low, add oil to proper level (para. 2-10).
Step 6. Check for hydraulic oil leaks.
Tighten loose connections. If leaks continue, notify unit
maintenance.
37. VEHICLE ROLLS WHILE OPERATING REAR WINCH.
Step 1. Check to see if parking brake is applied.
If not, apply parking brake.
Step 2. Check to see if chock blocks are in place.
If not, place chock blocks at wheels and notify unit maintenance.
EXPANSIBLE VANS
38. LIGHT SHINES THROUGH GAPS AT SIDE PANEL OF VAN BODY.
Step 1. Check toggle clamps at side panels (para. 2-27).
If toggle clamp does not draw top of side panel tight enough, loosen
locknut on toggle clamp eyebolt. Turn eyebolt inward to close the
gap. Tighten locknut.
Step 2. Check to see if roof is properly seated.
If not, loosen toggle clamp, push up on hinged roof, and push out on
end panels, then reclose toggle clamps to ensure seal alignment.
Step 3. Check to see if blackout panels are closed properly.
If not, slide up blackout panels on van sides and rear doors until
they latch in closed position.
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