CHAPTER 4
MAINTENANCE
LUBRICATION
The slide rod, upset force selector cam, and all miscellaneous pivot
points should be lubricated every six months. The interval between lub-
rication may be shortened or lengthened, depending upon how much dust
and dirt are in the area. If the slide rod sticks, then the rod should be
cleaned and greased more often. The grinder motor will not normally
require lubrication for several years. Use ASTM Grade 215
or equivalent oil on all lubrication points except the slide
SLIDE ROD MAINTENANCE
The slide rod should be kept clean and greased. Rust or dirt may cause
rod to stick and "burn out" the weld.
Check movable jaw for freedom of movement. If it binds, apply a drop
of oil to slide rod and work it in by repeatedly pressing the lever. If
this does not free the jaw movement, remove slide rod and clean and
grease it. Before removing slide rod, clamp a piece of saw band securely
between welder jaws to maintain correct spacing. Use ASTM
Grade 465 grease, or equivalent on slide rod.
The slide rod stop screw should not bind slide rod. Turn screw in, then
back off 3/4 turn.
WELDER JAWS MAINTENANCE
TO secure consistent results, the welder jaws must be kept clean.
During the welding cycle, excess metal in the form of incandescent
particles is blown out of the weld, causing a scale or flash to build
up on the welder jaws. The welder will not weld properly unless the
jaws are wiped clean after every weld.
Misalignment of the weld is usually caused by worn or dirty jaws.
However, if the welder jaws are clean and not worn and the welds
are out of line, then the jaws are not aligned properly. This mis-
alignment can be determined by inspection of the weld after the
flash has been removed. After determining which jaw is not in
alignment, the jaws can be adjusted as desired. Jaw alignment
instructions are given in a separate Engineering Adjustment
S u m m a r y . Replace lower jaw inserts that are worn excessively.
CUT-OFF SWITCH AND WELD SWITCH CONTACT POINTS
If the cut-off and weld switch contact points are welded together,
pitted, corroded, or covered by oxide, they must be replaced. If
the points are only dirty, clean them with a commercial point
cleaner and clean, Iintless cloth (such as linen tape).
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