Welder/Generator Maintenance; Generator Commutator And Brushes - Lincoln Electric CLASSIC I SVM134-A Service Manual

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WELDER/GENERATOR
MAINTENANCE
STORAGE: Store the Classic I in clean, dry, protected
areas.
CLEANING: Blow out the generator and controls peri-
odically with low pressure air. Do this at least once a
week in particularly dirty areas.
NAMEPLATES: Whenever routine maintenance is per-
formed on this machine - or at least yearly - inspect all
nameplates and labels for legibility. Replace those
which are no longer clear. Refer to the parts list for the
replacement item number.
GENERATOR COMMUTATOR AND BRUSHES: The
generator brushes are properly adjusted when the
welder is shipped. They require no particular attention.
CAUTION
DO NOT SHIFT THE BRUSHES or adjust the rocker
setting.
Shifting of the brushes may result in:
• Change in machine output
• Commutator damage
• Excessive brush wear
MAINTENANCE
Periodically inspect the commutators and brushes by
removing the covers. DO NOT remove these covers
while the machine is running.
Commutators and brushes require little attention.
However, if they are black or appear uneven, have
them cleaned by experienced maintenance personnel
using a commutator stone. Never use emery cloth or
paper for this purpose.
Replace brushes when they wear within 1/4" of the pig-
tail. A complete set of replacement brushes should be
kept on hand. Lincoln brushes have a curved face to fit
the commutator. Have experienced maintenance per-
sonnel seat these brushes by lightly stoning the com-
mutator as the armature rotates at full speed until con-
tact is made across the full face of the brushes. After
stoning, blow out the dust with low pressure air.
Uncovered rotating equipment can be dangerous. Use
care so your hands, hair, clothing or tools do not catch
in the rotating parts. Protect yourself from particles that
may be thrown out by the rotating armature when ston-
ing the commutator.
Arcing or excessive exciter brush wear indicates a pos-
sible misaligned shaft. Have an authorized Lincoln
Electric Field Service facility check and realign the
shaft.
BEARINGS: The Classic I is equipped with double-
shielded ball bearings having sufficient grease to last
indefinitely under normal service. Where the welder is
used constantly or in excessively dirty locations, it may
be necessary to add one half ounce of grease per year.
A pad of grease one inch wide, one inch long, and one
inch high weighs approximately one half ounce. Over-
greasing is far worse than insufficient greasing.
When greasing the bearings, keep all dirt out of the
area. Wipe the fittings completely clean and use clean
equipment. More bearing failures are caused by dirt
introduced during greasing than from insufficient
grease.
CLASSIC I
WARNING
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