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CHAPTER 4 SEWING MACHINE REPAIR | Up
Aircrew Survival Equipmentman 1 & C - Aviation theories and other practices | Next
TIMING THE 111 W 155 MACHINE |
PREVENTIVE MAINTENANCE
If the sewing machine becomes sluggish,
an accumulation of dust and lint or a loose
power belt may be the cause. To prevent the
buildup of dust and lint, you should cover the
sewing machine when it is not in use.
CLEANING AND OILING
Before you attempt to oil or operate a new
sewing machine, clean it with diesel fuel. The
diesel fuel removes any corrosion-protective
lubricants that may have been placed on the
sewing machine at the factory. During normal
maintenance, you may use any approved
cleaning solvent to clean the sewing machine.
After you use a sewing machine, clean and
oil it. A clean and well-oiled sewing machine
gives you many hours of trouble-free operation.
You may clean hard-to-reach places with a soft-
bristle brush or air pressure. Clean the outside
of the sewing machine head, the oil pan, the
machine stand, and the motor casing with a
clean dust cloth or air pressure. Never use air
pressure above 25 psi for this purpose.
NOTE: At least once a year, the machine
should be thoroughly cleaned and oiled. Figures
4-1 through 4-3 show the oiling points on the 111
239.281
Figure 4-1.—Front view of Model 225 sewing machine showing oiling points.
4-2
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