TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 273 of 985

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cent)

]

2-15. TROUBLESHOOTING INSTRUCTIONS (CONT).]

Table 2-9. Troubleshooting (Cent)

tialfunction

Test or Inspection

Corrective Action

HEAVY-DUTY WINCH (CONT)

1.

WINCH CABLE WILL NOT PAY OUT (M984) (CONT).

SELECTOR VALVE

TA1 86042

Step

4.

Check resistance of wire No. 682 from high idle box connector pin A to pin in male solenoid

connector.

If resistance is more than zero ohms, replace wire No. 682 (para 17-24).

Step 5. Check resistance of wire from male solenoid connector socket to vehicle ground.

If resistance is more than zero ohms, replace wire.

Step 6. Check for defective heavy-duty selector valve. Connect winch controller

(TM 9-2320-279-10). Set ENGINE and PIXl ENGAGE switches to ON. Press OUT switch on

winch controller and listen for clicking sound at valve.

If clicking sound is not heard, replace heavy-duty selector valve (para 19-1 1).

Step 7. Remove hydraulic lines from motor valve and heavy-duty selector valve. Check hydraulic

lines for dirt, debris, and damage.

Remove dirt and debris. Replace damaged line.