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 48 of 624
TM 9-2320-283-34-1
TROUBLESHOOTING
2-7.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TRANSMISSION
1.
TRANSMISSION SHIFTS AT TOO HIGH A SPEED.
Step 1.
Check for a stuck or damaged governor.
Clean or replace governor (para 3-29).
Step 2.
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).
2.
TRANSMISSION SHIFTS AT TOO LOW A SPEED.
See malfunction 1, steps 1 and 2.
3.
OIL LEAKING INTO CONVERTER HOUSING.
Step 1.
Check for worn torque converter pump hub or leaking seal.
Repair torque converter pump (para 3-38).
Step 2.
Check for worn or leaking rear engine seal.
Repair rear engine seal (TM 9-2815-225-34&P).
4.
TRANSMISSION OVERHEATING.
Step 1.
Check for low lubrication oil pressure (para 3-57).
a.
Replace external oil filter (TM 9-2320-283-20).
b.
Clean or replace oil lines and fittings (TM 9-2320-283-20).
c.
Clean or replace oil cooler (TM 9-2320-283-20).
2-4
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