TM-9-2320-283-34-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1983
TM-9-2320-283-34-1 - Page 49 of 624
TM 9-2320-283-34-1
TROUBLESHOOTING
2-7.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
TRANSMISSION OVERHEATING (Continued).
Step 2.
Check for low main oil pressure (para 3-57).
a.
Replace internal oil filter (TM 9-2320-283-20).
b.
Replace valve body (para 3-30 and para 3-54).
c.
Replace or repair torque converter pump (para 3-31, para 3-38, and para 3-53).
5.
NO RESPONSE TO SHIFT LEVER MOVEMENT.
Step 1.
Check for damaged or loose range selector part at valve body.
Clean or repair transmission housing (para 3-47).
Step 2.
Check for low main oil pressure (para 3-57).
a.
Replace internal oil filter (TM 9-2320-282-20).
b.
Replace valve body (para 3-30 and para 3-54).
c.
Replace or repair torque converter pump (para 3-31, para 3-38, and para 3-53).
6.
ROUGH SHIFTING.
Check shift speed adjustment.
a.
Adjust shift speed (para 3-56).
b.
If malfunction is not corrected, replace valve body (para 3-30 and para 3-54).
7.
DIRTY OIL.
Check for damaged clutches.
Overhaul transmission (para 3-27 thru para 3-56).
2-5
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