Lincoln Electric CLASSIC IM514-A - Manual (Page 18)

D-2 MAINTENANCE D-2
CLASSIC I
LINCOLN
ELECTRIC ELECTRIC
®
Bearings
This welder is equipped with a double-shielded ball
bearing having sufficient grease to last indefinitely
under normal service. Where the welder is used con-
stantly or in excessively dirty locations, it may be nec-
essary 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 insuffi-
cient grease.
Commutator and Brushes
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 rotat-
ing armature when stoning the commutator.
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The generator brushes are properly adjusted when the
welder is shipped. They require no particular atten-
tion. 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
Periodically inspect the commutator and brushes by
removing the covers. DO NOT remove or replace
these covers while the machine is running.
Commutators require little attention. However, if they
are black or appear uneven, have them cleaned by an
experienced maintenance man using fine sandpaper
or a commutator stone. Never use emery cloth or
paper for this purpose.
Replace brushes when they wear within 1/4” of the
pigtail. A complete set of replacement brushes should
be kept on hand. Lincoln brushes have a curved face
to fit the commutator. Have an experienced mainte-
nance man seat these brushes by lightly stoning the
commutator as the armature rotates at full speed until
contact is made across the full face of the brushes.
After stoning, blow out the dust with low pressure air.
Arcing or excessive exciter brush wear indicates a
possible misaligned shaft. Have an authorized Field
Service Shop check and realign the shaft.
Idler Maintenance
Before doing electrical work on the idler printed
circuit board, disconnect the battery.
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1. The solenoid plunger must work freely because
binding can cause engine surging. If surging
occurs, be sure the plunger is properly lined up
with the carburetor lever. Dust the plunger about
once a year with graphite powder.
2. When any service is done, reassemble the rubber
bellows on the solenoid plunger with the vent hole
on the lower side.
3. Proper operation of the idler requires good ground-
ing of the printed circuit board (through its mount-
ing), reed switch, and battery.
4. If desired, the welder can be used without automat-
ic idling by setting the “Idler” switch to the “High
Idle” position.
5. When installing a new battery or using a jumper
battery to start the engine, be sure the battery
polarity is connected properly. The correct polarity
is negative ground. Damage to the engine alterna-
tor and the printed circuit board can result from
incorrect connection.
Nameplates
Whenever routine maintenance is performed 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 replace-
ment item number.
WARNING
CAUTION