Matchless G3LS - CHECKING OIL CIRCULATION; Oil Flow Observation Method

REMOVE CAP SPRING AND
DISHED SEAT FOR SPRING,
TO OBTAIN ACCESS TO
FELT FILTER FOR I T S
WITHDRAWAL.
VENT PIPE P REVEN TING
AIR LOCKS .
WITH CA P REMOVED THE
OI L FLOW IS VISIBLE.
TO P LEVEL MARK.
LOW LEVEL
MARK.
TUBE FORMING CHAMBER
FOR OIL FILTER, THEREBY
ISOLATING IT FROM THE
OI L TANK
DRAIN PLUG.
O IL RETURN PIPE FROM
ENGINE RETURN PUMP.
METAL GAUZE FILTER (PULL
OFF OIL FEED PIPE WITH ITS
CONNECTING RUBBER TUB E,
AN D FILTER CAN THEN BE
WITHDRAWN DOWNWARDS)
GRAVITY PIPE TO ENGINE
OI L FEED PUMP.
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 bent over end of the oil return pipe will
be noticed some two inches 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 circula-
tion is deranged, the fact is apparent at once by the lack of a steady return flow.
Illustration 3
Showing the oil tank with the felt filter in its cylindrical housing and the
metal strainer mounted on the entry end of the feed pipe union. Also
shows the direction of flow of oil from tank to engine and return flow from
engine to tank via the small spout, located so that it can be inspected by
removing the tank filler cap. An air vent pipe is provided to ensure free-
dom from air-locks.
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