ENGINE OVERHEATS (ENGINE AUDIBLE ALARM ACTIVATES) - Continued

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ENGINE OVERHEATS (ENGINE AUDIBLE ALARM ACTIVATES) - Continued

TM-5-1940-277-20 Boat Bridge Erection Twin Jet Aluminum Hull MODEL USCSBMK1 (1940-01-105-5728) MODEL USCSBMK2 (1940-01-218-9165) Manual

ENGINE OVERHEATS (ENGINE AUDIBLE ALARM ACTIVATES) - Continued.

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.

b. MK2.

Step 1.

Stop engine and turn engine circuit switch OFF.

Step 2.

Check keel cooler for marine growth and other foreign matter. Also check for leaks,

cracked nickel plating, or any sign of corrosion.

a. Clean keel coolers with wire brush.

b. Replace keel coolers (refer to paragraph 3-77).

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