Lincoln Electric Welder WIREMATIC 255

No combustible materials in the welding or cutting area or around the machine

No debris, dust, dirt, or materials that could block the air flow to the machine

Electrode cables inspected for any slits, punctures in the cable jacket, or any condition that would affect the proper operation of the machine

Sign off on the daily welder maintenance

Cable removed from the wire feeder and laid out straight on the floor

Contact tip removed from the gun

Low pressure air used to gently blow out the cable liner from the gas diffuser end

Cable flexed over its entire length and blown out again

Procedure repeated until no more dirt comes out

Warning: This maintenance check requires trained personnel with PPE!

Wire drive mechanism inspected after every coil of wire?

Drive mechanism cleaned with low pressure compressed air?

Was solvent used for cleaning the idle roll?

If solvent was used, report the issue to the maintenance team and stop the procedure

Drive roll changed if a different wire size was used?

Sign off on the drive rolls and guide tubes maintenance

Warning: This inspection requires trained personnel with PPE!

Internal parts of the gun handle inspected

Gun handle consists of two halves held together with a collar on each end

Turn the collars approximately 60 degrees counterclockwise

Collar pulled off the gun handle

NOTE: If the collars are difficult to turn, position the gun handle against a corner, place a screwdriver against the tab on the collar and give the screwdriver a sharp blow to turn the collar past an internal locking rib

Sign off on the gun handle assembly inspection

Remove the gas nozzle and nozzle insulator

Locate the set screw in the gas diffuser which is used to hold the old liner in place

Loosen the set screw with a 5/64\ (2.0mm) Allen wrench"

Remove the gas diffuser from the gun tube

Lay the gun and cable out straight on a flat surface

Loosen the set screw located in the brass connector at the feeder end of the cable and pull the liner out of the cable

Insert a new untrimmed liner into the connector end of the cable

Check the liner bushing stencil to make sure it is the appropriate one for the wire size being used

Fully seat the liner bushing into the connector