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Bearings
This welder is equipped with a
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
WARNING
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.
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
CAUTION
Before doing electrical work on the idler printed circuit board, disconnect the battery.
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.
CLASSIC I
LINCOLN ®
ELECTRIC