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Lincoln classic 3 d welder

Welder will not weld

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The Lincoln Classic 3D welder has a flashing diode attached between the main generator brushes, this is a cathode to stud diode which also has an NC MOV connected across the circuit for protection from field collapse, it is attached to a copper band and is easily seen, remove the generator cover, standing in front of the welder with the cover removed, it should be on the right side.
This is a common problem on this machine, and is simple to test & replace.
also,... attached to the back of the front control panel of the machine is a 20 amp glassine fuse, next to a 40 amp 800 volt bridge rectifier, both also easily tested and replaced.
check the conduction zone on the exciter brushes, the surface of the brush riding on the slip rings, or commutator, depending on which machine you have, should be 'shiny" and smooth, indicating and insuring proper conduction.

Posted on Mar 04, 2015

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Posted on Jan 02, 2017

ROMOAS
  • 97 Answers

SOURCE: My lincoln welder has auxiliary power, but will

there is a controller board issue at that point it will have to go to a service center do to there are no supplier's for them other that Lincoln go to their sit HERE and find a service center in your area these boards range from $250.00 to $600.00 there is 4 of them in the machine they will have to remove the top and swap the boards till they find the right one have the same welder i have been through this with Lincoln already hope this helps

Posted on Aug 31, 2010

  • 1 Answer

SOURCE: HAVE A LINCOLN ARC 5000

I know whats wrong licoln is a giant peice of **** i had this same thing happen to my ranger 8 look at your pc board 2 chips fell out ill bet on it

Posted on Nov 15, 2010

H2_Brad
  • 425 Answers

SOURCE: hi, i have a lincoln

You can try to turn the screw on the carb to slightly raise the idle and see if that makes a difference. If not then there is usually a type of inductive pick up that has part of the wiring going through it. When it sense a current draw it releases the engine from low speed. Some of these set ups don't work well if the idle is turned down too far so that's why I suggested trying that first. Plus is that works it is a cheap repair.

Posted on Jul 20, 2011

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