Driveshaft Bushing Tolerances

[AL Farmall Boy]

Does anyone know what he acceptable tolerances are on the brass/bronze bushings at both ends of the driveshaft on a quiet line cub cadet 1450? I want to check the bushing ID with a Set of calipers.......I'll measure them 6 different ways to get a good idea if they are out of round.

What is acceptable and what is not ?

[finsruskw]

Driveshafts are of 5/8" stock
If the bushing is out of round, or the driveshaft ends are worn, it's only going to get worse.
Mushy engine mounts and warped/old/soft flex disc joints don't do it any favors either.
Sounds like it's time to go through the drive train and engine mounts, might even be the result of a failed/cracked 3 point flex driver also.

[ol'George]

If the ball feels loose on the OD. or ID. just replace them, I think Jeff still
Sells them @ a good price, I had some extras a while back and seems like i sold them for like $14 for a pair, and they were from the OEM supplier.
Also if the shaft ends show wear, replace it
Tractor supply sells 5/8 (.625) shaft, seems like they run a .002 small IIRR.
Hope this helps.

[AL Farmall Boy]

Originally Posted by ol'George

If the ball feels loose on the OD. or ID. just replace them, I think Jeff still
Sells them @ a good price, I had some extras a while back and seems like i sold them for like $14 for a pair, and they were from the OEM supplier.
Also if the shaft ends show wear, replace it
Tractor supply sells 5/8 (.625) shaft, seems like they run a .002 small IIRR.
Hope this helps.

I felt it all when it was together and i didn't feel any bad play in the shaft. Now that I have eheryrhingnapart I wanted to just check the bushings to see if they were ok. I am replacing rubber engine mounts, hydro fan, rubber rag joints on driveshaft. I also did the brace mod on the engine cradle.

[twoton]

Sounds like you're on your way.

You should start one thread on this so you have all your info in one place.

With pictures!

[Jeff in Pa]

Originally Posted by AL Farmall Boy

I felt it all when it was together and i didn't feel any bad play in the shaft. Now that I have eheryrhingnapart I wanted to just check the bushings to see if they were ok. I am replacing rubber engine mounts, hydro fan, rubber rag joints on driveshaft. I also did the brace mod on the engine cradle.

The ball bushings should be snug on the driveshaft and in radial movement ( not loose as they pivot in the "collar" )

Make sure the driveshaft doesn't have any wear either. One worn component can cause all the rest to wear quickly.

[AL Farmall Boy]

Originally Posted by Jeff in Pa

The ball bushings should be snug on the driveshaft and in radial movement ( not loose as they pivot in the "collar" )

Make sure the driveshaft doesn't have any wear either. One worn component can cause all the rest to wear quickly.

Jeff, so I need to check the drive shaft with the calipers to mke sure it is 5/8" and not out of round on the ends?

[Jeff in Pa]

Originally Posted by AL Farmall Boy

Jeff, so I need to check the drive shaft with the calipers to mke sure it is 5/8" and not out of round on the ends?

That would be best. The driveshaft material I've been getting lately has been measuring .623 . A little undersize would be acceptable but out of round will cause faster wear.

[AL Farmall Boy]

I found that the bushing ID on the engine coupler was 0.630. The shaft OD at the engine end was 0.620 and 0.615. There was a slightly worn spot on one side of the shaft. 5/8 inches is 0.625. Are those tolerances acceptable? What do you think about the worn spot on the shaft ? Is it bad enough it needs replacing?

[Jeff in Pa]

Originally Posted by AL Farmall Boy

I found that the bushing ID on the engine coupler was 0.630. The shaft OD at the engine end was 0.620 and 0.615. There was a slightly worn spot on one side of the shaft. 5/8 inches is 0.625. Are those tolerances acceptable? What do you think about the worn spot on the shaft ? Is it bad enough it needs replacing?

I just measured a brand new ball bushing and the ID measures .627

With the driveshaft, it's already .005 out of round. If you keep the used parts in, you could probably use it for a bit more but keep an eye on it.

As it wears, it will put more strain on the rag joints and the bolt holes. Don't let it get too back or it will trash the couplers in addition to the driveshaft.

Your tractor, your call.
Jeff