Here's a photo

The pulley is wallowed out to about 1 1/8" I don't know it kept running.....

Looks like I have a lead on another unit, so it might work out.

She was charging at 20 amps right to the end.

If I remember right the gen shaft is something close to 11/16" and the thread o.d. is slightly less. Run the gen as a motor, clean up shaft with emery and take a tiny bit off the top of the threads. A good quality 5/8" washer will be near interference fit or you can ream it out some.

Buy a narrow belt pulley with near the same belt angle and saw in half. Use the flat washers to get to your belt width and file out the keyway.

Joe

Frank

I converted my ‘53 VAC to alternator 8 years ago. The pulley I got was then sized for ¾” nominal belt width (measured across the top) and 40° taper. I used the original gen belt which was Gates 551 (now Gates TR24449 and crosses back to Case VT4886). The belt is still on there and fits the pulleys very well.

I don’t know how they measure the width these days or the taper either but I think 40° nominal is pretty much automotive standard.

Go to this link, lookup the belts for VAC in application. Different generator p/n’s listed will affect the length but not the width or taper.

Case parts manual E61lists 3 generators and 2 belts.

Gen VT3467 (autolite GAS-4169A) V-belt VT2102.
Gen VT4885 (autolite GBM4823A-5) and the later replacement that includes the regulator VT3350 (autolite GHD6001-SS) apparently use the same V-belt VT4886.

Go to the interchange at the link and lookup your present V-belt p/n and see if it matches the gates p/n for your application, if so use that belt to size a new pulley.

Joe

• Gates cross-ref

I had a similiar problem and a different pulley did not quite fix it so I made a pulley that fit the slightly undersized worn armature shaft. Once the pulley was painted you could not tell that it was not original.

Jerry

I might have to do that if I cannot find a suitable replacement.

Thnaks!

Frank