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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
7. ENGINE OVERHEATS (ENGINE AUDIBLE ALARM ACTIVATES) - Continued.
Step 3.
Check water intake.
a. Clean strainer and housing.
b. Replace strainer (refer to paragraph 3-66).
Step 4.
Inspect cooling system pump `A' impeller, cam and end plate (refer to paragraph 3-80).
a. Replace defective impeller.
b. Replace defective cam.
c. Replace end plate.
d. Replace cooling system pump `A' (refer to paragraph 3-61).
Step 5.
Check coolant level in header tank.
a. Fill to 1" below neck.
Step 6.
Check for leaks in fresh water system.
a. Tighten hose clamps.
b. Replace defective hoses (refer to paragraph 3-67).
c.
Repair header tank (refer to paragraph 3-71).
d. Replace header tank (refer to paragraph 3-72).
Step 7.
Check raw water hoses and fittings (refer to paragraph 3-67).
a. Tighten hose clamps.
b. Replace defective hoses and fittings (refer to paragraph 3-67).
Step 8.
Check V-belt for looseness, breaks, or fraying.
a. Adjust to correct tension (refer to paragraph 3-119).
b. Replace V-belt (refer to paragraph 3-119).
2-22
Change 2
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