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MG MGB Technical - Generator Pully Removal

I would appreciate any tips on how to grip the generator pulley in order to loosen the nut so I can remove the pulley and fan from the shaft.

Thanks,
Greg
Greg Van Hook

I've never tried it myself, but I've heard that the trick is to put an old drive belt round the pulley and tighten the free end in a vice. Allegedly that keeps the pulley stationary while you undo the nut.
Miles Banister

Greg. Use an impact wrench on the nut. Mile's suggestion of holding onto the pulley with an old fan belt is a good one, but I have not found it necessary to use a vise to hold it tight. A glove on the holding hand and the impact wrench in the other has always worked for me.

Les
Les Bengtson

Thanks Miles,

Of course! I'll do that.

I tried holding onto an old belt around the pulley with a pair of vise grips, pulling the vise grips one way while trying to turn the nut with a ratchet the other way. I guess if I was Superman that might work......

Thanks a lot,
Greg
Greg Van Hook

Greg - If you have some copper pads on the vice jaws, you can hold the pulley in the vice without damaging it (if you don't have come copper pads, you might think about making some - exceedingly useful). Cheers - Dave
David DuBois

Thanks all,

I couldn't really get the belt in my vise so I resorted to brute force. I used the Ingersoll Rand air gun with 300 ft-lb and the vise grip belt, and the nut came right off. My first notion is not always brute force, but maybe sometimes it should be. Luckily, the vise grips are not embedded in my head (or leg, Dave!).

My Dad always had brass grips for his vise, and I've never found them in a store. I have a 6" Craftsman vise with rubberish magnetic things that work in many instances but generally, just aren't appropriate.

Anyway, the Moss instructions on polarizing the generator (it comes with negative ground - I have positive ground) talk about "terminal A" on the voltage regulator. I'm guessing they mean "terminal B". Anybody know for sure?

Now, on to the new heater valve. Hopefully will make the show Sunday!

Cheers,
Greg
Greg Van Hook

Oh, I just watched the Moss video on You Tube. For the MGB, it is "terminal B".

Sorry. Wish me luck!
Greg Van Hook

Greg - I find it easier to and more positive to just remove both the leads from the generator, attach a jumper wire to the smaller of the two terminals and wipe the other end of the wire across the battery cable at the starter solenoid once or twice. Cheers - Dave
David DuBois

"Luckily, the vise grips are not embedded in my head (or leg, Dave!)."

Hey - I resemble that remark :) Cheers - Dave
David DuBois

If it's a pulley with the little ears on it, like the one on my TR, I put a socket and ratchet on the nut, hold the body down on the floor with my foot, then pound on the ears with hammer and screwdriver or punch. To tighten, hold the pulley to the floor with your foot and pound on the ratchet handle. But it's probably not like that, eh?

The air gun sounds convenient. Electric impact guns are pretty reasonable now. The kids at the discount parts place even have one. They like to play with their tools and would probably help you out.
Tom

Success!!

The ignition warning light is now acting normally, and the batteries are charging!!!

Greg
Greg Van Hook

This thread was discussed between 09/06/2009 and 10/06/2009

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