1936 Generator Pulley Alignment
 

I have a bit of a mystery that I'm trying to figure out and was hoping someone here could steer me straight.


I purchased a generator for my '36 and when I went to mount it, the pulley is about 3/8's of an inch too far to the rear. This is the pulley that a fan attaches to. I bought a generator that has been converted to 12V.


I do have an aftermarket intake (Offenhauser) so I measured the distance from the front bolt hole to the generator mounting flange. I compared this to a stock intake which I also have and the Offenhauser flange is actually a quarter inch forward of where the stock unit is. That means if I went back to stock, I would be even further to the rear! I am wondering if I have the wrong generator or perhaps the wrong pulley. My generator has a 5/8's diameter shaft and I did read that this may not be stock for my '36.


Is it possible to shim the pulley forward? I can't picture a way to shim the whole unit forward because the generator mount fits in a slot.


Ideas?

Re: 1936 Generator Pulley Alignment
 

I'm thinking wrong generator. The front cover/intake mount appears ot be for a later flathead engine, i.e. 59 series, or 8ba.

Definitely not for a proper fit with a stock 36 intake.

Re: 1936 Generator Pulley Alignment
 

I agree with with John. You're thinking that way too. You're rebuilt generator doesn't have the hole on top where the wires come out. You need an earlier generator. I think ones from 32 up to 39 standard standard are needed and can be rebuilt the same way, but the 2 wires for generator and field will come out that hole in the top and go to a 12v regulator.

Re: 1936 Generator Pulley Alignment
 

Correct as above post. That is a much later generator made to work with a three unit voltage regulator. The gen housing and front end bracket are quite different to an original 36 generator which had the round cut out on top of it and a cover band to cover the brush access openings. Armature length is shorter on the 36 gen. Regards, Kevin.

Re: 1936 Generator Pulley Alignment
 

Ok but if the armature is shorter, wouldn’t the pulley be even further to the rear? Or is the mount further back on the old ones?

Thanks for the responses.

Re: 1936 Generator Pulley Alignment
 

Look on epay for the 1936 generator. It could be the mount that is the difference. Mike

Re: 1936 Generator Pulley Alignment
 

Like all modifications, Murphy's Law is in place. The aftermarket intake manifold was the first difference. The later type generator in the second difference. These alterations are do-able but a person has to look over all the different mounts to see what will work best with the manifold. The chassis parts books have illustrations of all the different gen front mounts. All the early ones were 3-brush and later manifolds were more for the 2-brush generators that came along at the end of the 30s decade. Power Gen alternators generally have the later type mount. A spacer plate might be the easiest method of adapting what you have. That wouldn't be hard for someone with a milling machine but the average DIY guy has to draw up a plan and take it to a machine shop.

Re: 1936 Generator Pulley Alignment
 

In the picture you can see how far the back of the pulley is in front
of the mounting bracket compared to yours.


Bob

Re: 1936 Generator Pulley Alignment
 

And a longer stud to mount it.

Re: 1936 Generator Pulley Alignment
 

Here are more of the early style generators with fan mount pulleys that were removed from '34 - '37 FH engines

Re: 1936 Generator Pulley Alignment
 

your later gen has the two holes on each side of the mounting stud to mount the fan on a later motor. never done it, but how about use those holes to mount a 3/8"plate on back to move it all forward?

Re: 1936 Generator Pulley Alignment
 

Don't 'kludge' it. Find a correct generator....

Re: 1936 Generator Pulley Alignment
 

Going to be a little more difficult than finding a new generator, it will require a front mount that is correct for the manifold (which is different than the original) and is converted to 12v for use with a regulator. If it was me I would just build a simple spacer. Guess you could get an original generator, machine the mount to match the manifold and then have it converted to 12v, etc. A spacer seems much simpler to me.

Re: 1936 Generator Pulley Alignment
 

seems pretty easy to me too. i would start with a 1/2" plate, mill off the two sides so it has a raised center to fit the slot on the mount on the manifold, drill 3 holes ...done

Re: 1936 Generator Pulley Alignment
 

You need the front plate for the 2 brush like a 39,40 would use

Re: 1936 Generator Pulley Alignment
 

The gen mount has the two holes to mount the fan assembly. What does that indicate? 59A or 8BA? The gen mount mounts the gen too far back at any rate.
I took a 39? gen and put a 56 field case on it and used the original armature and end plates.
It worked just fine.
I probably have a good early gen in my stash. You would need the 56 up case. That may be what you have now. I have been assured that you really don't need the later case and just turn up the voltage. I used the later case.

Re: 1936 Generator Pulley Alignment
 

That is a great idea...thank you. I thought about a spacer, but didn't know how to keep the unit from rotating. Using those bolt holes will keep it in place. Now to find a longer stud.

Re: 1936 Generator Pulley Alignment
 

Any chance you could return the generator and get one that fits? If the company you bought it from sold it to you for your '36 they goofed. If they won't exchange it for the correct one post their name.

Charlie Stephens

Re: 1936 Generator Pulley Alignment
 

good point charlie!

Re: 1936 Generator Pulley Alignment
 

How do you get one that fits when the intake manifold is not original and the mount on the manifold is not in the original position? An original for the model year would have to be modified as well so why not work with the one he has?