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 326 of 744

CONDITION/INDICATION

Is 2,850 psi (19 650 kPa) measured at heavy-duty winch motor?

DECISION

No - Replace heavy-duty winch control valve (relief valve faulty). (WP 0072)Test 13 - Does heavy-duty winch

operate in both directions?

Yes - Test 11 - Is more than 270 psi (1 861 kPa) measured on winch hydraulic brake release hose?

TEST 11 - Is more than 270 psi (1 861 kPa) measured on winch hydraulic brake release hose?

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 hose.

2. Disconnect winch brake release hose at winch brake. Cap fitting on winch brake assembly. Refer to schematics.

3. Connect 0 to 6000 psi (0 to 41 370 kPa) pressure gauge to winch brake release hose.

TB 9-2320-279-13&P-4

0032

0032-16