TM 5-1940-322-24
0006 00
MECHANICAL SYSTEMS TROUBLESHOOTING (Contd)
Table 2. Transmission Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Check oil strainer for obstruction.
Remove and clean oil strainer.
1. LOW MAIN OIL
PRESSURE
2. Check oil pump assembly for
Replace damaged or worn out oil pump
damage or worn parts.
1. Check oil level.
2. NO OIL PRESSURE
OR ERRATIC LOW
2. Check lubricating oil pump suction
Remove lubricating oil pump suction
PRESSURE AT
strainer for obstructions.
CONTROL VALVE
3. Check for air leaks on suction side
Remove lubricating oil pump and
of lubricating oil pump.
1. Check oil level.
3. HIGH
TEMPERATURE
2. Check raw water filter for blockage
1. Clean raw water filter basket
and/or damage.
2. If damage is present, replace raw
3. Check transmission oil cooler for
If blockage is present, flush
blockage.
4. Check transmission oil cooler for
If damage is present, replace
damage.
Check drive plate for damage.
If drive plate is damaged, replace
4. EXCESSIVE NOISE
1. Check oil pump output pressure.
If oil pump output pressure is low,
5. LOW LUBE OIL
PRESSURE
2. Check pump suction strainer for
Remove pump suction strainer and
blockage.
Check oil orifices and passages for
1. Clear all obstructions from oil
6. HIGH LUBE OIL
clogs or blockage.
PRESSURE
2. If damaged, replace air seal ring