TM-9-2320-361-34

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

MAY 1992
TM-9-2320-361-34

  TM-9-2320-361-34 - Page 40 of 764

TM9-2320-361-34
Table 2-1. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step
9.
Step 10.
Remove tee fitting from upper manifold. Install all hydraulic hoses in correct locations
(para.
16-7).
Check hydraulic cylinders operation. Lower dump body until seated on subframe. Remove
lifting device. Operate dump body to raised position (TM
9-2320-361-10).
If dump body still will not work, replace hydraulic cylinders (para. 16-8).
END OF TESTING!
50.
DUMP BODY WILL NOT LOWER
WARNING
Overhead lifting device capacity must be greater than dump body weight.
Overhead lifting device must remain attached to dump body until
troubleshooting is completed. A shifting, swinging, or falling load may
cause injury to personnel.
All personnel must stand clear of dump body during lowering test.
Step 1.
Step
2.
Step
3.
Step
4.
Step
5.
Step
6.
Falling dump body may cause injury to personnel.
NOTE
Dump body lowering operation should be checked after each completed
troubleshooting check.
Apply parking brake (TM9-2320-361-10).
Attach overhead lifting device to dump body with sufficient slack to show slight downward
movement.
Check hydraulic lock cylinder hose valve to ensure that each shutoff is open at upper
manifold.
Perform troubleshooting malfunction 49, step 2.
Check control valve for restrictions. Remove and inspect (para. 16-10).
If control valve is restricted, clean or replace (para. 16-10).
Check hydraulic cylinders (malfunction 49, step 10).
If hydraulic cylinders are defective, replace or repair (para. 16-8 or 16-9).
END OF TESTING!
51.
DUMP BODY WILL NOT HOLD IN RAISED POSITION
Step 1. Perform troubleshooting checks malfunction 49, steps 3 through 8.
Step 2. Check hydraulic cylinders (malfunction 49, step 10).
If hydraulic cylinders are defective, replace or repair (para. 16-8 or 16-9).
END OF TESTING!
FUEL TANK (M49A2C)
WARNING
Do not perform this procedure while smoking or within 50 ft (15 m)
of sparks or open flame. Fuel is flammable and can explode easily,
causing injury or death to personnel and damage to equipment.
52. FUEL WILL NOT PUMP FROM COMPARTMENTS OR PUMPS SLOWLY
Step 1. Check transfer case power takeoff operation.
If transfer case power takeoff is not operating, check operation (malfunction 46).
2-25


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