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 TM 5-1940-277-20
TM 1940-20/2
Section IV. TROUBLESHOOTING (Continued)
MK1 and MK2 w/SABRE
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. ENGINE OIL PRESSURE LOW (ENGINE AUDIBLE ALARM COMES ON) (LOW GAGE READING).
Step 1.
Turn engine alarm mute switch OFF.
Step 2.
Check engine oil level (refer to paragraph 3-76).
a. Fill to proper level (refer to paragraph 3-76).
Step 3.
Check oil filter element.
a. Tighten if leaking.
b. Replace oil filter element (refer to paragraph 3-76).
Step 4.
Check oil lines and fittings.
a. Tighten connections.
b. Replace defective lines and fittings.
Step 5.
Check water in header tank for oil film as evidence of oil cooler leak (refer to paragraph
a. Repair oil cooler (refer to paragraph 3-75).
b.
Replace oil cooler (refer to paragraph 3-74).
Step 6.
Check oil pressure sending unit.
a. Replace defective sending unit (refer to paragraph 3-101).
9. SUDDEN LOSS OF OIL PRESSURE.
Step 1.
Check engine oil level.
a. Fill to proper level (refer to paragraph 3-134).
Step 2. Check for oil leaks (engine running).
a. Repair leaks.
b. Contact Direct Support Maintenance.
Step 3.
Check oil pressure sending unit.
a. Replace defective sending unit (refer to paragraph 3-101).
2-26
Change 2
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