transmission bearings

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transmission bearings

Postby artc » Tue Apr 27, 2004 12:21 pm

a leak coming from the front trans seal brought a halt to the planned painting trip on Pete. rolling it around and loading it on the trailer had it peeing out the inspection hole :oops: :lol:

so, Pete decided he wanted to come apart for a front trans seal. connected splitting stand, removed fenders, floor pan, and split tractor at transmission. seal junk, input bearing seems to have too much play not to trash a new seal, and it looks like the bearing is removed by driving it INTO the case after the input shaft is removed. is that right?
My question, assuming that 1/8 inch of vertical play in the input bearing is excessive, is what are the 4 bearing part numbers :?:
the ATIS FAQ list only lists two.
yes, i know. should of done this before. no matter, sure was quick to take apart the SECOND time :!: :!: :oops: :oops:
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Postby Donny M » Tue Apr 27, 2004 12:59 pm

artc,

Do not try to drive the bearing out through the tranny you will break something :!: :!: :!: The bearing comes with the spline. It has a small circlip that captivates the bearing on the shaft. I'm not sure of the part # but I bought a new bearing from NAPA.
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Postby John *.?-!.* cub owner » Tue Apr 27, 2004 2:17 pm

It's been a while, but if I remember correctly, the front trans bearing is seated against a lip on the gear side of the transmission housing. It comes out toward the flywheel after the seal retainer is removed. I think the seal retainer also holds the bearing from sliding forward, since I've been warned that if you reverse the retainer the shaft will slide end to end enough for the pto to slip.
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Postby Oscar Meier » Tue Apr 27, 2004 2:48 pm

You need to remove the PTO to remove the shaft. The input bearing will pull out with the shaft. The shaft has a raised area that will push the bearing as you drive it out towards the clutch. The bearing also has a circle clip around the shaft to keep the bearing from floating forward towards the trans seal. The bearing inside race sets on a milled section of the shaft, you may have to tap the bearing off the milled section. There is also a bronze bearing on the inside of the drive shaft for the PTO shaft end alignment - it may be loose.

Use some white grease on the seal when you slide it down the shaft to reinstall - that will keep about 5 years of wear off the seal until you get a chance to use it.

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Postby Oscar Meier » Tue Apr 27, 2004 2:55 pm

I forgot to mention that you also need to take-off the transmission shifter, shift forks and sliding gears to remove the drive shaft. Watch the poppet index ball bearings on the shift fork shafts - thoes are a problem when they pop out - not to mention the springs behind them. Usually, they end up in the bottom of the transmission.

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Postby artc » Wed Apr 28, 2004 7:20 am

thanks, Oscar and all. i'll get to it after this weekend. The spring gas up and show at the Zagray Farm Museum is this weekend, so no time for Cub stuff.

Part numbers, anyone, for the four bearings? :?: :?:
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Postby rleggitt » Wed Apr 28, 2004 8:48 pm

Artc,

Bearing, Transmission Spline Shaft Front ST 542 [I don't think you can
get this from Case IH] NAPA part no. is: 6304-27-nrj

Bearing, Transmission Spline Shaft Rear 352 402 R91
Note: this part is used on transmission cases 351 530 R1 thru
351 530 R5 -cub tractors with engine serial no. 180613 and
below.

Bearing, Countershaft Rear 350 857 R91

Bearing, Countershaft Front ST 668

These part numbers come from the parts manual Group 07 page 7, item numbers 11, 5, 16, & 33 respectfuly, part no. 357 931 R91 is item no. 36.

Also, please note that on tractors with serial no. 180614 & above and all
Cub lo-boys you will need :

Bearing, Transmission Spline Shaft Rear 357 931 R91
in lieu of part no. 352 402 R91

Hope this helps.
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