Lincoln AC-225-S Fan Problem and Repair

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Hi to all.First off, thanks for some of the Great Fabricating ideas ya'll have shared on this forum. I got to witness a lot of fab work at my truck shop but never really got a hands-on experience with the welding. I am going to take a introductory welding course at the local junior college this summer. I just purchased a old Lincoln Arc-Welder AC-225-S off of Craigs List a couple of weeks back. I got it home, cleaned it up inside and fired it up. The welder works but the fan didn't work. I did a lot of research on the internet and discovered that the Lincolns (as well as some of the others) had fan issues, but I never found any information that addressed possible solutions for the fan motor.I performed the following mtc on my fan motor and now it works as good as new. After all the info I have taken from this site,I wanted to share this with ya'llHere is what I did. After removing the fan cover on the back of the AC-225-S, I loosend the fan bracket to rear cover mounting screws, then proceeded to remove all the rear cover screws and lowered the fan/motor/bracket assembly onto the top of the transformer. I cut both of the fan wires at the power switch and took the fan/motor/bracket assembly to the bench. I removed the fan and the mounting bracket, and noticed hard resistance to fan shaft rotation. On the end of the fan motor it says to oil with non-detergent 20 wt every 90 days. I don't think this fan had ever been oiled. I marked the motor housing on one side so as to ease reassembly. I removed the 2 motor frame screws and wrapped the back side of the motor to protect it and secured the motor in the vise. I used a slide hammer with a seal puller head and hooked onto the center recess on the motor and gave the slide hammer one slam and the front half of the motor came loose. On inspection, the shaft was fine, as were the end bushings, but the motor armature was very rough, as was the stator. I used a no-film spray cleaner and a very fine emory cloth to clean both of these. I oiled the end bushings then reassembled the motor useing the markings I had made earlier, put the frame bolts back in, and reassembled the fan/motor/bracket assembly and put new eye terminal connectors on the fan motor wires and reattached them to the power switch.. I fired up the crackerbox and the fan works GREAT. I got pictures of the fan but not the work I just described to you. All I can say is before you shell out the bucks for a new fan motor, you might give this a try. I am going to use the money I saved on fan motor replacement and get some new welding leads. I have included some pics of my fan motor that I was able to fix.Also, I would like to know what year this Lincoln was built. The date code is: 5683-612I hope this helps someone out there. Thanks for your time Attached Images
Reply:Thanks for the reference pics!
Reply:Hard to tell the date. 612 gives the date of 19x6 dec. could be 1976 or 1966.sense it has a fan I would guess 1976. Oldest units have copper windings and no fan. To get closer. You will have to contact lincoln.