Generator pulley 59 for a fan bolt om

[deuce lover]

That is the 39 Standard IMO.Had a couple over the yrs and had Whitney in Fullerton CA do the 12V conversion on them .

[3W Hank]

Good info.

[ndnchf]

It turns out that generator I showed a few days ago was a mix of parts, not a true '39 standard/pickup generator. It was not functional as it was. But I restored it into a fully functional, 2-brush with pulley mounted fan - very similar to the rare '39 standard generator. This uses the extra large bearing to carry the fan load, not the standard 2-brush bearing. I just had it running on the test bench this morning, putting out over 30 amps :-)

I'll be bringing it to Hershey in less than 2 weeks. It will be for sale on my table along with other restored generators. If you are there, stop by and say hi. South chocolate CJ 71-73.
Steve

[tubman]

Originally Posted by ndnchf

It turns out that gener............ This uses the extra large bearing to carry the fan load, not the standard 2-brush bearing. I just had it running on the test bench this morning, putting out over 30 amps :-)....... If you are there, stop by and say hi. South chocolate CJ 71-73.
Steve

I mentioned this early on in this thread, and nobody seemed to pay any attention; i would seem to be important, given the purpose of this thread.

[Tim Ayers]

Originally Posted by tubman

I mentioned this early on in this thread, and nobody seemed to pay any attention; i would seem to be important, given the purpose of this thread.

It does seem like an upgrade, but thousands of the early ones with fan mounts were run with the Timken-style bearing and you generally don't hear of failures.

While rebuilding or looking for a replacement, any way to improve these old systems would seem to be a benefit.

[Ol' Ron]

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Running an electric fan, would solve allot of problems and be better for the engine. Nobosy uses them anymore.
Gramps

[alchemy]

Originally Posted by Ol' Ron

Running an electric fan, would solve allot of problems and be better for the engine. Nobosy uses them anymore.
Gramps

Don’t say nobody. There are a lot of us that do. I would rather walk than use an ugly electric fan.

[3W Hank]

I agree to that.
But Ol' Ron is not wrong.
It's 2024 now.
I will try find a std 42 pulley, as I has a new idea on fan.

[alchemy]

It’s not 2024 here. We are driving home from a swap meet with a truckload of 1932.

[3W Hank]

Its 2024 nomatter, but no electric fan for me.

Question.
So the pulley is from a older one whit now bigger holes made, or ?

[big deuce]

Originally Posted by ndnchf

It turns out that generator I showed a few days ago was a mix of parts, not a true '39 standard/pickup generator. It was not functional as it was. But I restored it into a fully functional, 2-brush with pulley mounted fan - very similar to the rare '39 standard generator. This uses the extra large bearing to carry the fan load, not the standard 2-brush bearing. I just had it running on the test bench this morning, putting out over 30 amps :-)

I'll be bringing it to Hershey in less than 2 weeks. It will be for sale on my table along with other restored generators. If you are there, stop by and say hi. South chocolate CJ 71-73.
Steve

Do tell what the "larger front bearing was used". The .590 shaft from 32-36 use two tapered roller bearings for fan use and needed lubrication. I couldn't find a tapered roller used in pairs for the later, larger .669 diameter shaft. I took apart my '41 generator, and removed the single roller bearing. The pocket size to work with is 40mmx 14mm, shaft size 17mm. I have this one coming, should fit right in, whether I use a fan or not, its good for radial loads from the belt.
LR5003NPPU Track Roller Double Row Bearing 17x40x14 Sealed Track Bearings VXB Brand

[ndnchf]

Originally Posted by big deuce

Do tell what the "larger front bearing was used". The .590 shaft from 32-36 use two tapered roller bearings for fan use and needed lubrication. I couldn't find a tapered roller used in pairs for the later, larger .669 diameter shaft. I took apart my '41 generator, and removed the single roller bearing. The pocket size to work with is 40mmx 14mm, shaft size 17mm. I have this one coming, should fit right in, whether I use a fan or not, its good for radial loads from the belt.
LR5003NPPU Track Roller Double Row Bearing 17x40x14 Sealed Track Bearings VXB Brand

In the 1938-1939 period (and a few other specialty generators) they went to what I call the big bearing, a 6303-2RS Ball Bearing 17mm x47mm x14mm. Apparently Ford engineers determined that this bearing could handle radial belt loads and axial fan thrust loads. It was much simpler and less costly than the multi-part tapered roller bearings package used in 1932-1937 generators. After generator pulley mounted fans were discontinued, they reverted back to a smaller 6203 bearing as used in model A tube generators.

As side note - In 1932-1937 generators I use a 5202-2RS double row angular contact bearing with custom machined inner and outer race spacer rings to make up the stack height difference. These modern sealed bearings are designed to take both radial and axial loads.

[big deuce]

Ok, so there's the difference in the 38-39 front mount, they used a 47mm OD, and in '40
forward, they used the 40mm like mine. Thanks for the detailed post.

[Tim Ayers]

I've tried to follow, but what am I missing? Early generators that had the fan on the front used two small, Timken-style bearings and millions were made this way and used successfully in cars.

The move to removing the fan from the generator and then Ford went to using a sealed bearing in the two brush generators.

So I understand, the two brush style can't handle a fan without upgrading the bearing in the front? Isn't a sealed roller "technically" stronger than a Timken-style bearing?

[kurt v]

Is your motor hanging on the bell housing , hope the bell doesn't snap off, put a support to hold up front of motor.

[glennpm]

Originally Posted by kurt v

Is your motor hanging on the bell housing , hope the bell doesn't snap off, put a support to hold up front of motor.

Yes, disaster waiting to happen

[ndnchf]

Originally Posted by Tim Ayers

I've tried to follow, but what am I missing? Early generators that had the fan on the front used two small, Timken-style bearings and millions were made this way and used successfully in cars.

The move to removing the fan from the generator and then Ford went to using a sealed bearing in the two brush generators.

So I understand, the two brush style can't handle a fan without upgrading the bearing in the front? Isn't a sealed roller "technically" stronger than a Timken-style bearing?

I don't know all the answers, Ford had a bewildering variety of generators. It hurts my head to try to understand them. That being said, my understanding is that in 1938 they went to the large 6303 bearing in 3 brush and the soon to arrive 2 brush generators with fan mount pulleys. The 2 brush has a larger generator body, so there are different size front fork plates. The photo shows the larger 2 brush plate on the left, smaller 3 brush plate on the right. The other photos shows the bearings. On the bottom is the multi-part double roller bearing used 1932-1837, in the middle is the large 6303 bearing used in 1938-1939, at the top is the 6203 bearing used afterwards for non-fan mount pulley generators. There are many other variations. But this is a general overview.

[cas3]

Late great Bruce Lancaster said, " looking at the generator section in the green book will give you a headache. Good photos ndnchf, thanks

[Tim Ayers]

Originally Posted by ndnchf

I don't know all the answers, Ford had a bewildering variety of generators. It hurts my head to try to understand them. That being said, my understanding is that in 1938 they went to the large 6303 bearing in 3 brush and the soon to arrive 2 brush generators with fan mount pulleys. The 2 brush has a larger generator body, so there are different size front fork plates. The photo shows the larger 2 brush plate on the left, smaller 3 brush plate on the right. The other photos shows the bearings. On the bottom is the multi-part double roller bearing used 1932-1837, in the middle is the large 6303 bearing used in 1938-1939, at the top is the 6203 bearing used afterwards for non-fan mount pulley generators. There are many other variations. But this is a general overview.

Thank you. This is very helpful.

[Ken/Alabama]

Originally Posted by ndnchf

To remove pulley, first remove the armature, front bearing plate and pulley as a unit. Then clamp the armature in a padded vice. Remove the small C-clip on the end of the shaft. Then unscrew the pulley, use a strap wrench if it is tight. It is a left hand thread.

Not left hand threads.