Mig Welders/Wire Feeders
Erratic wire feed or bird nesting of wire is most commonly caused by liner
issues.  Average gun rebuild consists of:
liner, diffuser, tip and nozzle.
Average cost for rebuild is$35.00.


Symptoms suggesting it is time to rebuild gun and clean drive assembly :
--   
wire drags, feeds erratically or 'bird nests' inside machine
--   wire burns back to tip
--   you are having to increase the amount of tension being placed
on wire as it feeds into the gun.
Cleaning your drive assembly consists of:
--   
cleaning the groove on your drive roll
--   cleaning the wire inlet and outlet guides
--   cleaning oil and debris from compartment area

You will need to consult your owners manual on how to install your new
liner. Most but not all liners are held in the gun at the rear by a set screw.
Once loosened the liner can be removed from the
REAR of the gun. The
nozzle, diffuser and tip most be removed prior to installing the new liner.
When cutting your new liner length to fit the gun, it is best to use the old
liner as a length gun.
DO NOT CUT THE LINER TO THE LENGTH OF
THE GUN.
The liner must seat into the base of the diffuser to insure
smooth wire transition from liner to tip.

2. The second common problem is that the gun has pulled apart from the
factory crimp at the mchine end or handle end.

Symptoms include:
--  
the wire feeds but only sparkles on work surface or ground
clamp
--  installed new liner but wire still drags or feeds erratically
--  gun handle is getting hot while welding

These are the two most common problems with mig welders. If
you are having problems other than this, simply contact us for
further instructions.
OWNERS MANUALS
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OEM PARTS
Century welder parts
breakdowns are not
available online. Contact
us for information
Most  mig Century.
Contact us for
information
COMMON PROBLEMS
WARRANTY
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Click here to learn more.
Copyright 2007-2014 Bill's Welding Equipment Repair All rights reserved Rev Jan 2014
Century 135GL/GS
Century 125GL/GS
The Tweco Mini-Mig is used as the gun on several (but not all) Century Welders.
We will be adding video to the
USER ACCESS

Videos to include basic
troubleshoot, Gun rebuild, and
maintenance.
Catalog for various misc parts.
Profax-Lenco