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Inspect all of the oil tubes and oil wicks
protruding from the oil tubes. The oil tubes should not be broken, bent or
pinched, which would reduce the amount of oil flowing to the various
components. The oil wicks should not be worn off, frayed or missing from
the oil tubes. This will also reduce or limit the oil supply to the
components. Replace any damaged tubes or damaged or missing wicks.
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Remove the head cover and use a small brush,
rag or compressed air to carefully remove any lint or other debris from
this area, Figure 6.
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Check the various thread contact surfaces such
as looper, throat plate, presser foot, take-up, eyelets, tensions, etc.
for nicks, burrs or worn parts and repair or replace as necessary,
Figure 7. Also make sure that all of
these areas are cleaned thoroughly.
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After all of the lint, thread, and
miscellaneous debris has been removed, replace all of the covers and the
oil plug and set the machine on a flat, level surface. Fill the
machine with oil at the top crank cover using the Union Special Spec #175
oil, Figure 8, until the oil is
visible between the two red lines of the oil gauge,
Figure 9. Also put a couple drops of oil
at each of the holes marked "OIL" on the cloth plate.
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Once the machine has been properly filled with
oil, it is advisable to run the machine slowly for a few minutes to let
the oil flow to critical areas. Also, if the needle bar was wiped dry, it
is advisable to put a couple of drops of oil on it prior to running the
machine.
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