Lincoln Electric Welding Inverter 350 MP

Remove the gas diffuser from the gun tube

Lay gun and cable out straight on a flat surface. Loosen set screw of the connector on the back end of the gun

Insert the untrimmed Liner into the back end of the gun

Seat Liner bushing into back of gun. Secure Liner by tightening set screw. Do not install the gas diffuser at this time

Lay the cable straight and trim Liner to 9/16”. Remove burrs

Install insulator and secure the gas diffuser into the tube

Sign off on the liner replacement

Warning: Always ensure the welder is turned off and unplugged before performing any maintenance.

Is the welder located in an extremely dusty location?

If yes, perform the following steps more frequently.

Is there excessive dirt and dust build-up on internal parts?

If yes, blow dirt out of the welder with low-pressure air.

Are the fan motors' sealed ball bearings in good condition?

If not, report to the maintenance team.

If yes, replace worn contact tips as required.

Warning: This maintenance check requires trained personnel with PPE!

Wire drive mechanism inspected?

Cleaned with low pressure compressed air?

Warning: Do not use solvents for cleaning the idle roll because it may wash the lubricant out of the bearing

Drive roll changed if necessary?

Sign off on the drive rolls and guide plate maintenance

Hold “select” switch up while powering up machine

Release “select” switch when displays show “Pres sPin”

Turn the volts / trim knob until displays show “9un CAL”

Toggle the “select” switch up and release

Right display should display a number

Use the volts / trim knob to adjust the calibration value

Toggle the “select” switch up and release to save

The right display should scroll the word “SAVEd’

Warning: This procedure should be performed by trained personnel only

Enter the amount of electrode used

Cable removed from the wire feeder?

Contact tip removed from the gun?

Cable liner cleaned with air hose?

Sign off on the gun cable cleaning