TB-9-2320-279-13-P-4
TRUCK, TRACTOR, LIGHT EQUIPMENT TRANSPORTER (LET), 8X8, M983A2 LET
TECHNICAL BULLETIN; OPERATOR AND FIELD LEVEL
APRIL 2008
TB-9-2320-279-13-P-4 - Page 289 of 744
FIELD MAINTENANCE
WINCH HIGH SPEED DOES NOT OPERATE OR WINCH DOES NOT SHIFT TO LOWER SPEED UNDER HEAVY
LOAD
INITIAL SETUP:
Tools and Special Tools
Cap and Plug Set (WP 0081, Table 2, Item 1)
Kit, Hydraulic Test (WP 0081, Table 2, Item 2)
Pan, Drain, 4 Gallon (WP 0081, Table 2, Item 3)
Tool Kit, General Mechanic's: Automotive (WP
0081, Table 2, Item 5)
Wrench, 18 in. Adjustable (WP 0081, Table 2,
Item 6)
Goggles, Industrial (WP 0081, Table 2, Item 7)
Personnel Required
Wheeled Vehicle Mechanic 63B (2)
Equipment Condition
Engine OFF (refer to TM 9-2320-279-10).
Parking brake applied (refer to TM 9-2320-279-10).
Wheels chocked (refer to TM 9-2320-279-10).
TROUBLESHOOTING PROCEDURE
WINCH HIGH SPEED DOES NOT OPERATE OR WINCH DOES NOT SHIFT TO LOWER SPEED UNDER HEAVY
LOAD
TEST 1 - Are 20 gpm (76 lpm) flow and 2,850 psi (19 650 kPa) measured at heavy-duty winch motor?
WARNING
•
Hydraulic system pressure can exceed 3,000 psi (20 684 kPa). A high-pressure hydraulic
system can pierce a body. Ensure engine if OFF prior to disconnecting hydraulic hoses. Failure
to comply may result in injury or death to personnel.
•
Never disconnect any high-pressure hydraulic hose, line or component without first dropping
pressure to zero. Failure to comply may result in injury or death to personnel.
•
Wear proper eye protection when working with or performing checks on high-pressure hydraulic
systems. Failure to comply may result in injury or death to personnel.
1. Place suitable drain pan under heavy-duty winch assembly prior to removing hoses.
TB 9-2320-279-13&P-4
0030
0030-1
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