Lincoln AC 225 fan issues

[K2Orion]

Like most garage guys, I've got a Lincoln AC225 tombstone.
Bought it a fundraising auction. It rarely gets used, welds great when I do use it. The last time I used it I noticed the fan wasn't running. So I pulled it out from under the bench, opened it up, took a look.
The fan spins easily, bearings are lubed.
The fan will not spin when I put 220 power to it.
I assume something is wrong with the windings of the fan.
BUT, I am only reading ~23 volts at the connections where it was hooked up.
Is this correct?

BTW, its a code 6304-909.

 

[38Chevy454]

The fan may only pull from one leg (half) of the 220. So it is really a 110v fan motor? Chase the wiring and see if one leg of the fan is actually neutral.

 

[G_P]

There wont be a neutral in that welder. If the fan is 120v it's using one hot leg and the ground which I doubt would be the case.

 

[zkling]

IIRC the fan on those is 220v. Are you sure you are measuring the input voltage to the fan correctly? The fact that it is off by a power of 10 is a bit odd.

 

[Highbeam]

Arc welders weld at 24 volts. You must be reading the welding leads. That's fine.

I believe that the fan on the AC225 is somehow 120. I ran mine off of a genset to do some grouser build up on a dozer and my generator had the weird floating neutral thing and a 4 prong 240 outlet. I recall having to use the white from the genset instead of the ground to get the fan running.

Check your ground situation to be sure that it is working properly.

 

[nehog]

The fan, from what I know, is 240 volts. I'd recheck the voltage at the fan motor again, and if it really is 23 volts, check wiring.

 

[Danno1]

The fan, from what I know, is 240 volts. I'd recheck the voltage at the fan motor again, and if it really is 23 volts, check wiring.

And clean the various connections while you're in there.



.

 

[K2Orion]

So I guess this fan was not wired correctly. Somebody had messed with it before, there were crimp **** connectors on both wires.
I'll get a new fan.
220 or 110, either way I'll wire it accordingly.

And I refuse to clean the connections. You're not the boss of me.

 

[Stuart in MN]

Here's a scan of the wiring schematic for an AC 225. It appears the fan is 240vac, it's connected right across the main switch terminals.

http://cdn.instructables.com/FZ9/74JO/GF7BBO7U/FZ974JOGF7BBO7U.LARGE.jpg