Multipule disc clutch pilot bearing

[Steve Plucker]

Was the multiple disc clutch pilot bearing the same as that used with the single disc clutch?

Thank you.

Steve Plucker

[fundytides]

According to Bratton's catalog, the multi-disk clutch did not use a pilot bearing.

[Steve Plucker]

Originally Posted by fundytides

According to Bratton's catalog, the multi-disk clutch did not use a pilot bearing.

Well that statement is wrong!

[katy]

Ford parts lists says: A-7118-A Transmission main shaft pilot bearing 1928-31

[Bob C]

Misread original question.



Bob

[katy]

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Originally Posted by Bob C

No, the multiple disc bearing is A-7580-AR and the single disc is A-7580-B.
You can see a picture at the link.

http://www.santaanitaas.org/wp-conte...l-Aug-2003.pdf


Bob

Methinks that you're confusing the pilot bearing w/the release (throwout) bearing

[Bob C]

Originally Posted by katy

Methinks that you're confusing the pilot bearing w/the release (throwout) bearing

Your right, I screwed up.


Bob

[katy]

Well I goofed up also. The bearing # I gave is for the Main shaft which is the shaft inside the cluster gear.
Parts list shows: A-7600-A is the clutch pilot bearing 1928-31. IIRC that's a 6203 bearing.

[J Franklin]

A very common use bearing, even my Ferguson tractor used it.

[Benson]

Big green book ALSO shows a pilot bearing page 346 P/N 70-7600-B called "OILITE"

I believe that this might have been an Oilite bushing ...

along with a felt washer P/N A-7608

and a retainer A-7609-A.

Footnote says that felt is "no longer supplied"

[Benson]

On side note:
Bearing 6203 was also used on various IBM machines over the years.

[J Franklin]

Originally Posted by Benson

On side note:
Bearing 6203 was also used on various IBM machines over the years.

And many many other things.

[katy]

Originally Posted by Benson

Big green book ALSO shows a pilot bearing page 346 P/N 70-7600-B called "OILITE"

I believe that this might have been a Oilite bushing ...

along with a felt washer P/N A-7608

and a retainer A-7609-A.

Footnote says that felt is "no longer supplied"

I have a couple of those bearings in the bottom of my toolbox, been there for years, came out of flathead V8s. I'll try and remember to get a picture later today.

[katy]

Here's a picture of the "oilite" bearings along w/a used 6203. They don't say Ford on them so maybe they're aftermarket replacements? I always kinda assumed that they were bronze. The 6203 looks smaller in the picture, but they're all the same size.

[Joe K]

Picking up a four year old thread.

The multi-disk clutch assembly I just brought home has a typical Model A pilot bearing. It's marked FEDERAL 1203 (numbers obscured) but measures out the same as the Model A.

Shield on one side.

Fits the shaft on the odd Multi-disk tranny input shaft. Fits the hole in the multi-disk flywheel. No spacers or felts.

Joe K

[rotorwrench]

They are generally phosphor bronze bushings but it depends on what company manufactured them. Oilite is a trade name product that is made from various materials depending on application. It has the look of tiny bits of copper-tin alloy that are compressed an fused together to give it a matrix that will hold a lubricant. Iron and graphite are also in the mix for some applications.

[johnbuckley]

I don't want to hijack the thread but my 1930 phaeton (single clutch disc) sometimes slips out of 2nd .I'm convinced it's slackness at the pilot bearing (after having replaced everything else!) Can someone confirm the shaft diameter should be .668 inch dia (16.972 mm) and the pilot bearing is Bearing # 6203, 17mm ID, 40mm OD ,12mm wide.. There seem to various types of 6203 - Rubber seal, metal seal, open, deep groove etc. which type should it be ?

[Joe K]

Originally Posted by johnbuckley

I don't want to hijack the thread but my 1930 phaeton (single clutch disc) sometimes slips out of 2nd .I'm convinced it's slackness at the pilot bearing (after having replaced everything else!) Can someone confirm the shaft diameter should be .668 inch dia (16.972 mm) and the pilot bearing is Bearing # 6203, 17mm ID, 40mm OD ,12mm wide.. There seem to various types of 6203 - Rubber seal, metal seal, open, deep groove etc. which type should it be ?

You confirm what it should be. Known in A-land as the A-7600-A or possibly B-7600-A (depends on which parts price list you look at)

The multi-plate I'm playing with now has a "Federal 1203" bearing - it has a metal shield on ONE side. No felt as I found it. I'm not convinced it is the original bearing as the '31/'32 parts list show an "open" bearing with a felt pad where the shaft passes from the clutch area.

I'm not sure it matters the method this is sealed. Seal want to be on the "clutch" side to evade the "disk dust." Some seal or method, even the felt, is probably recommended. The single metal seal makes sense and would have been thought superior once seal/shield technology became more common.

I might opine that a "rubber" seal will probably afford you better sealing, but at the downside of "resistance" to turning - and this is one of those bearings if for some reason it "hangs up" would be detrimental to transmission/clutch alignment. The interference between the shaft and the bearing bore is not "drive tight" (although I have made it such by clamping a vise-grip around the shaft BEFORE assembly.) But even a shaft upset using vice grips is not a guaranteed "forever."

Maybe go with the metal shield one side as this one was? Grease up the open side as you install? Bush the shaft portion to build it up or buy a new input shaft/gear. (I've done both.)

Parts suppliers seem to provide this bearing with "seals both sides." The seals are plastic but they might not have rubber edge that rubs against the inner bearing. Worth asking your supplier. "Sealed for life" is where bearings generally have gone. And plastic/rubber covers CAN be removed with an awl. You might not want to?

Best
Joe K

[johnbuckley]

Thanks for comprehensive reply Joe. I am not convinced that our suppliers either side of the Atlantic always keep the highest quality parts. Which is why I am considering getting a known bearing from a bearing depot over here rather rather than just ordering a generic A-7600-A or B-7600-A from a Model A parts supplier (The last A 7600A I bought from a reputable major Ford A supplier was made in China). Whatever... I'd rather spend a few pounds/dollars/euros extra on a high quality bearing rather than have to remove the engine and transmission for the nth time !!

[Y-Blockhead]

Is the sealed ball bearing preferred over the bronze "Oilite" bushing?

Just curious what the masses prefer and why??