Lincoln Electric Welder WM-250

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 free of 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?

Wire drive mechanism cleaned with low pressure compressed air?

Did you use solvents for cleaning the idle roll?

If solvents were used, report to the maintenance team and stop the procedure

Drive rolls stamped with the wire sizes they will feed?

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

Warning: Ensure the machine is turned off and cooled down before starting the procedure.

Gas nozzle and nozzle insulator removed

Set screw in the gas diffuser located

Set screw loosened with a 5/64\ (2.0mm) Allen wrench"

Gas diffuser removed from the gun tube

Gun and cable laid out straight on a flat surface

Set screw in the brass connector loosened and old liner pulled out

New untrimmed liner inserted into the connector end of the cable

Liner bushing stencil checked for appropriate wire size