M4 Fog Oil Pump. Driven by an air motor.

TM 3-1040-276-23

f. M4 Fog Oil Pump. Driven by an air motor.

rod. Oil pump draws fog oil through fog oil inlet hose

Engine exhaust gases enter pressurizing line through

inserted in fog oil drum. Oil pump pumps fog oil into fog

air check valve on M4 fog oil pump air motor. Pressure

oil line leading to engine assembly. Excess oil lubricates

from engine exhaust gases drives the air motor piston

air motor and is returned to fog oil drum through fog oil

which is connected to the oil pump piston by a piston

exhaust hose.

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