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 TM 5-1940-277-20
TM 1940-20/2
3-69. DRAIN AND REFILL PRIMARY AND SECONDARY COOLING SYSTEMS MK1 AND MK2 W/ SABRE
TOOLS:
Adjustable Wrench
7/16 inch Box Wrench
Suitable Container(s), approximately 8 gallons
PARTS/MATERIALS: Coolant
Teflon Tape
DRAIN:
NOTE
The boat must be out of water before draining cooling systems.
1.
Open and secure engine hatches (refer to parapaph 3-154).
2.
Carefully remove coolant filler cap.
3.
Open coolant drain points at cylinder block (1) and exhaust manifold, rear (2).
4.
Using adjustable wrench, remove coolant drain plug at primary water pump feed pipe (3).
NOTE
One keel cooler, when filled with coolant, weighs approximately
25 pounds. Before draining keel coolers, remove both keel coolers.
Refer to paragraph 3-87.
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