-
Remove the thread cover
and remove any lint or other foreign materials that may be in this area.
This too can be done using a small brush, rag or compressed air. Also
check the head cover gasket and replace if necessary.
(Figure 6)
-
Remove the top cover and
check for shake, binds and wear in the zigzag motion mechanism. Repair or
replace as necessary, also check the top cover gasket and replace if
necessary. (Figure 7)
-
Check the various thread
contact surfaces, such as eyelets, needles, loopers, throat plate, needles
guards, and take-up for nicks, burrs or worn areas, replace as necessary.
Worn parts can cause skips, malformed and inconsistent stitches. Also make
sure that all of these areas are cleaned thoroughly.
(Figure 8)
-
After the above
maintenance has been performed, replace all of the covers, gaskets and
parts that have been removed. Place the machine on a level surface and
fill the machine with new oil, Union Special Spec 175 is recommended,
until the oil is visible between the two red lines on the oil sight gauge.
(Figure 9)
-
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 the critical areas. Also if the
needle bar was wiped dry, it is advisable to put a few drops of oil on it
prior to running the machine.
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