OPERATION IN EXTREME COLD

TM 5-4930-233-14

TM 4930-14/1

Cold Engine Starting. Before attempting to start in subzero weather, make certain the consistency of the

crankcase oil is such that the engine can be started. Check the controls to make sure they are free and in

operating condition. When the engine starts, leave the choke partly open until the engine is warmed to

operating temperature, but be careful not to flood the carburetor.

Valves. Be extremely careful in operating all valves as they can be easily damaged in low temperatures.

Exhaust Heat Diverter. The engine exhaust diverter (1) ducts gas either to a heat reservoir beneath the

lubricant container or directly to atmosphere. Use as follows:

(1)

In cold weather, operate the engine exhaust diverter (1) to duct exhaust gas to the heat reservoir.

(2)

Start the engine (para 2-5) and dose all doors and panel vents on the lubricating unit.

(3)

Allow the engine to run for about 10 minutes with the air receiver drain valve lever (2) in open position.

(4)

Close the air receiver drain valve (2); wait until the compressor unloads before using the lubricant

pump.

(5)

Maintain control of lubricant temperature by opening and dosing the engine exhaust diverter (1) as

required.

NOTE

If the winterization assembly is to be used, the exhaust diverter

should be in the floor position.

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