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Basic Preventative Maintenance For Class 56000 Machines
Union Special Corporation's Class 56000
flatbed machines come in a variety of single and multi-needle styles to do
a wide variety of sewing operations.
These include the Class 56100, 56200 and
56300 single-needle machines for operations such as bag making,
binding shirt cuffs, and side seaming dress slacks.
The Class 56400, 56500 and 56700 styles
are two-needle machines for taping necks on T-shirts, riser seaming jeans
or center plaiting shirts.
The Class 56900 is a three-needle machine
for seat seaming jeans and various other three-needle sewing on work
pants, jackets and similar material.
Routine maintenance should be performed on
these and similar high speed flatbed machines at least twice a year or
every 2000 operating hours to keep your machine in tip-top condition.
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Drain the old oil from the machine. To
do this, remove the plug screw below the hand wheel of the machine,
Figure
1. Tip the machine carefully
until all of the old oil is removed.
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Remove the cloth plate and use
compressed air, a small brush or a rag to thoroughly clean the machine
of lint, threads and other debris, Figure 2.
If this build-up of lint and threads is not removed, excessive heat or
binding of the machine could occur.
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Remove the oil reservoir covers and
using a clean rag, wipe away the excessive oil and other contaminants
that could be in the oil reservoir chambers,
Figure 3. Also inspect the gaskets for cracks, tears or dry
rot and replace as necessary.
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Check for left to right shake in the
crankshaft and remove any excess shake. The machine should turn smoothly
without binds but should have no left to right shake.
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Check for free movement of the
connecting rods on the crankshaft, Figure
4. A small amount of left to
right shake is vital to the machine running smoothly and to prevent the
needle bearings from overheating.
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