CHECKING OIL CIRCULATION
Provision is made to observe the oil in circulation and it is advisable to do this before
each run.
If the filler cap on the oil tank is removed the end of the oil return pipe will
be noticed below the level of the filler cap orifice and the returning oil can be seen
running from it. This check should be made immediately after starting the engine from
cold. This is because while the engine is stationary, oil from all parts of the interior of
the engine drains back into the crankcase sump, so that, until this surplus is cleared, the
return flow is very positive and continuous. Therefore, if the oil circulation is deranged,
the fact is apparent at once by the lack of a steady return flow.
1
2
3
OUTLET IN OIL RETURN PIPE.
LEVEL INDICATOR LINE.
OIL RETURN PIPE.
7 VENT PIPE.
4
5
6
OIL FEED PIPE.
OIL FEED GAUZE FILTER.
DRAIN PLUG.
Illustration 4
Interior view of the oil tank showing the metal strainer mounted on the entry
end of the feed pipe union, the return flow pipe from the engine to tank via
the small spout, located so that it can be inspected by removing the tank filler
cap, and air vent pipe, provided to ensure freedom from air-locks.
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