TROUBLESHOOTING PROCEDURES (Continued)
TEST OR INSPECTION
LOSS OF LUBRICATION OIL PRESSURE (SUDDEN DROP OF PRESSURE)
Check sending units and gauges (refer to TM 5-1940-277-20).
If sending unit and gauges operating go to step 2.
Check engine oil level (refer to TM 5-1940-277-10).
If oil level correct go to step 3. Check sending units and gauges.
Cap under pressure when water hot. Remove carefully. Severe burns may result.
Remove header tank cap. Check fresh water for oil film contamination. Contamination indicates
cracked engine oil cooler tube stack (refer to TM 5-1940-277-20).
Replace oil cooler (refer to TM 5-1940-277-20).
If no contamination go to step 4.
Check for defective oil pump.
Replace defective oil pump (refer to page 3-9).
If oil pump all right contact supervisor.