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FLOATING OIL INTAKE
The floating oil intake (No. 28, Fig. 2) is attached to the
crankcase with two screws. The construction of the float
and screen cause it to remain on top of the oil, preventing
the circulation of water and dirt.
Once each year remove the float, screen and tube and clean
thoroughly with a suitable cleaning fluid. When replacing,
place some sealer on the gasket where the tube bears
against the engine crankcase. A leak at this point will
allow air to enter the oil suction line seriously affecting oil
pressure.
CRANKCASE VENTILATOR
The crankcase ventilating system provides thorough,
positive ventilation which reduces to a minimum the
formation of sludge. In operation (see Fgi. 12) clean air
flows from the air cleaner through the short connecting
tube to the oil filler tube and then through the crankcase
and valve compartment to the intake manifold. Any
vapours in the crankcase are carried into the manifold and
burned. Positive air circulation reduces oil temperatures
and the formation of moisture due to condensation. Air
flow is controlled at the manifold by the control valve.
Be sure there are no air leaks at the tube connection
between the air cleaner and oil filler tube, and that the oil
filler tube cap gasket is in good condition. Always keep the
cap locked securely in place.
When tuning the engine of grinding valves, remove the control valve and clean it thoroughly. If this valve is blocked with
carbon, the ventilating system will not operate and should the valve fail to seat, it will be impossible to make the engine idle
satisfactorily.