24t rehab

JLeus · Sep 5, 2012

Rehabing a 24t that is in pretty good shape to start with, that comment tempered with what I have invested so far, it will bale as it sits. Noticed that the bearings on the crankshaft that the feeder fingers is on are worn. Have not pulled it apart to confirm but it looks like the crank may have worn past the bearing and into the housing, not sure how thick the bearing sleeve is, and hopefully the crank "journal" is ok. Went to JD, the parts person knows I like playing with the old stuff......we both had a good laugh when the price for a housing/bearing came up, just the bearing is not to bad. My question is would the right sized flange bearing work here. Seems like a modern bearing might be good although I know there are times when the original design can't be beat. I would suspect that stub end is a common diameter, flange mount bearings are readily available at a much lower price. Another advantage would be that if the journal is scored a flange mount ball bearing would provide the inner race for the bearing eliminating the concern on the journal. Thanks in advance.

Dick2 · Sep 5, 2012

As I understand what you have, if the shaft has worn through the bearing/bushing into the housing, the shaft is probably grooved. The grooved shaft will chew through a new bushing fast and you'll be back in the same situation that you have now.

If the shaft can be smoothed down, then it might be practical to have a machine shop built the housing back up (by welding) and have it machined out to hold a new bushing.

Several options for you to consider. If it is external, you may be able to replace it with a pillow block ball bearing that fits the shaft.

shawnspeed3 · Sep 5, 2012

The other option is to pour a new babitt bearing ...several good books/articles online...just a thought...Shawn

JLeus · Sep 5, 2012

Its flange mount rather than pillow block, just curious if anybody has experience with a greaseable ball bearing living there compared to a sleeve, which by nature does a better job of keeping trash off the bearing surface.

northvale-PA · Sep 5, 2012

on a 336, the plunger head sleeve bearing needs to be installed then reamed to the pin's size. I got mine done because the plunger head had a wobble to it.

RodinNS · Sep 5, 2012

I'm not familiar with that particular bearing... but if you're dealing with a ball bearing of some sort... and a worn shaft... usually you can fix it up with some shim stock and green loctite (bearing retaining compound).
Plunger crank bearing on my 327 is gummed up with that for now... Not sure I want to buy a new crank at the list price either.

Rod

wisbaker · Sep 5, 2012

Or if the journal isn't messed up that bad have it turned down to eliminate the surface defects and make it round again then use a new undersized flange bearing. My concern with a chewed up journal is it might not be round anymore.

24t rehab

JLeus

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Dick2

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shawnspeed3

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JLeus

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northvale-PA

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RodinNS

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wisbaker

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