MAINTENANCE
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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.
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.
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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
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 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.
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