Lincoln Electric Welder WM-250

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

Inspect the mating surfaces of the spindle hubs and the spindle mounting clips (V-brackets) and, if necessary, wipe or blow out any dirt and debris which may have accumulated on these surfaces

Replace worn contact tips as required

Remove spatter from the inside of the gas nozzle and tip every 10 minutes of arc time or as required

Choose the correct size contact tip for the electrode being used

Be sure the nozzle insulator is fully screwed onto the gun tube and does not block the gas holes in the diffuser

Slip or screw the appropriate gas nozzle onto the nozzle insulator

Select the gas nozzle based on the welding application

Adjust the gas nozzle as appropriate for the GMAW process to be used

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

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

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