Double Pulley Alternator

[Foxlovescars]

1965 Riviera 401 with A/C. Time to replace the alternator. Could not find a vendor selling a double pulley 61 amp. Bought a nice Delco that looks original with a single pulley. What is the trick for getting the pulley nut off the alternator core bolt? To start, yesterday I sprayed penetrating lubricant on the shaft to loosen the nut. Assuming the nut comes off counter-clockwise, I used a socket wrench with a hex socket to hold the core bolt steady, while trying to remove the 15/16 inch nut with a closed-end wrench. It will not budge. In fact, I couldn't get the single pulley off of the NEW alternator. Is there an old-school method for getting off these alternator nuts? Thanks, Frank

[Guest wildcat465]

Frank, the local auto parts store should have an electric impact gun to get that nut loose.

Using hand tools is a lesson in futility.

I do not know of an old school method, maybe taking the case apart and holding the shaft somehow.

Good luck.

[Carbuff2]

I ran a parts store and the mechanics did as described above, they used their impact electric gun/wrench, looked simple after struggling at the counter to try and change one. Paul

[Foxlovescars]

I have access to an impact wrench, but how do you keep the fan wheel from not turning and damaging the blades?

Frank

[tenugent]

i changed mine by holding fan with a heavy glove-thats how i was directed by instructions.T.Nugent roa 12969...

[Foxlovescars]

Thanks for the help guys. Took both alternators to a local shop and they had the pulleys changed and back in my hands in 5 minutes. Told me it wasn't worth writing up a ticket to charge me! Life is good in Virginia. Frank

[RivNut]

Just a note for future reference. When you buy a new (rebuilt) alternator, take the old one with you. Sometimes the new one is the correct part but it won't fit correctly. Check to make sure the mounting ears are in the same relationship to the terminals. If not, have the guy at the parts store "clock" it for you. He'll remove the long bolts that hold the front to the case, and rotate it so everything aligns like you're original. That's also when you have them remove your double pulley and install it on the new one. You should be able to walk out with a "bolt on" assembly.

Ed