UnionSpecial 53700B, Adjusting Instructions And Illustrated Parts List

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USE GENUINE NEEDLES AND REPAIR PARTS
Success in the operation of these machines can be secured only with genuine UNION SPECIAL
Needles and Repair Parts as furnished by the Union Special Corporation, its subsidiaries and
authorized distributors. They are designed according to the most approved scientific principles, and are
made with the utmost precision. Maximum efficiency and durability are assured.
Genuine needles are packaged with labels marked Union Special Genuine repair parts are stamped
with the Union Special trademark, U S Emblem. Each trademark is your guarantee of the highest
quality in materials and workmanship.
TERMS
Prices are strictly net cash and are subject to change without notice. All shipments are forwarded f.o.b.
shipping point. Parcel Post shipments are insured unless otherwise directed. A charge is made to
cover the postage and insurance.
OILING AND THREADING
The oil has been drained from the machine before shipping, and the reservoir must be filled before
beginning to operate. Use a straight mineral oil with a Saybolt viscosity of 90 to 125 seconds at 1000
Fahrenheit.
Oil is filled at the spring cap in the top cover, and the oil level is checked at the sight gauge on the
front of the machine. The oil level should be maintained between the red lines on the gauge. The
capacity of the oil reservoir is 12 ounces.
The lubrication, which is almost entirely automatic, requires a minimum of manual oiling. The oiling
diagram on the opposite page is self-explanatory.
The main reservoir supplies oil to the looper drive eccentric, upper running feed drive eccentric, needle
lever crank: and the supply is registered at the front gauge. The entire lower mechanism is served
through a system of channels and wicks in the main frame by this reservoir.
A daily check before the morning start should be made and oil added if required. Oil which has gone
through the machine is filtered and pumped back into the main reservoir, making too frequent oilings
unnecessary. Excessive oil in the main reservoir may be drained at the plug screw in the main frame
directly under the handwheel.
The accompanying diagram also shows the threading of the single needle Class 53700B machine.
Threading of the two needle Class 53800B machine is substantially the same.
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