obsolute parts for a Miller Thunderbolt 225,,,

 I picked up a great looking Miller Thunderbolt 225 AMP Style JB-41 Arc welder for a really good price at a yard sale, The STYLE JB-41 is the only'ist numbers on the box. The PO said he stopped using the welder due to the blades on the tiny  cooling fan broke off. He removed the power cord and installed on new machine he bought.

 I installed a short power cord I had and it does weld but I only run it for about 2-3  mins. because of missing  fan blades. 

 I have looked on internet for obsolute Miller parts and Amazon and Ebay with NO luck,,,!!

 Any one got an Idee,,,??

 Some pics,,,,,

You might want to set a 20 inch box fan next to the welder and "TEST WELD" to make sure the COOLING solves your problem and you dont have ADDITIONAL WEAK parts ??

Hey Steve that small bathroom fan sure looks like whats in the Miller,,,but,,I'm gonna go with your Muffin fan suggestion in 240 volt and get that dude to welding,,,,!!!

 Thanks to all of ya'll for all your help,,,

 OK,, I decided the idea of doing a "Trial Run" to se if there is any good reason to keep on working on this machine. There is NO tag on the machine but writing states it is an A/C machine. The only numbers anywhere are "Style JB-41" stenciled at center top of face.

I had to machine some quick attach pins to adapt my Lincoln lead ends to the Miller ports and I notice the LOW port has been removed entirely. I then see where the PO had taped up the big copper wires that were on the outlet port from the Transformer,,,Hmm? Bad JUJU,,??  My thoughts here are that the red plastic quick attach port for the LOW had broken and PO just removed it and taped up the big copper wires inside box from Transformer,,?

 Got everything ready and turned that mother ON,,,,,! The fan motor has bearings gone and sounds terrible, so I disconect the power cable and disconnect the cooling fan,then try it again.

 The heat setting crank aT TOP of maching is quite stiff and will need some cleaning of the brownish varnish looking "stuff" on the sides of transformer and if possible will have to be taken apart to clean that varnish stuff before the sliding UP and Down part to adjust heat settings easier.

 I then notice that ,,,,,,EITHER the "Black Plastic SLIDING part in center of transformer and controlled by the Crank is a TWO piece or it has broken right in the center in the straightest crack you ever seen,,!??

 I set the heat at 90 and this will weld quite nicely with 6013 in 1/8" but DOES stick a few times,,,,maybe get some 6011,,??

 IF the big black plastic adjuster on the transformer is not broken,,,, then maybe there is a decent welder hidden in this project,,,??

 Steve has given me a link to a 240V cooling fan that will take just a pair of minutes  to install,,,,at $26 plus a replacement port for the LOW CAN'T BE TOO EXPENSIVE,??

 What ya'll think,,,,??

 Hey Steve,,,you know for $23, and a pair of minutes,  I could have a decent back-up arc welder,,,and a Miller at that,,!! I agree that you should not have to be changing heat very often altho, I would like to try and remove the black plastic chingas that slides up and down to adjust the heat as there is a fair amount of brownish  looking "varnish" that i'm sure would prolly help all things welding if cleaned up,,,??

  OF Course next thing would be to put a set of wheels( which I happen to have over there pointing to corner) this sob is HEAVY,,,!!!

DJ, get a 5# box of 7018AC rods. be sure it says AC at the end. It's specifically made for Allis Chamlers tractors, er.....AC welders. Have used it for decades as I just have a Lincoln AC-225-S. Arcs nice, smooth, consistent welds. My backup is 6011, aka 'farmers sticks'. smells like smouldering pants on fire, not near as nice.

The BIG thing with rods is to keep them warm and dry.Store in house on top of furnace is good. ANY moisture and  you'll get 'problems'...hard to start, misfires,zip not ZAP....

If you don't get a 240v fan, use 2 , 120 fans in series. LOTS of airflow.....