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Farmall & IHC Tractors Discussion Forum
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1951 Farmall H Transmission Noise.

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farmallhal

12-07-2004 16:31:13




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Have what sounds like a transmission bearing noise and haven't torn into anything yet. Had a good friend tell me since it goes away in 5th it is probably related to the pilot bearing between the upper main shaft and driving shaft. Noise is present in all other gears including neutral whenever the clutch is released. I feel play in the forward countershaft bearing at the front of the transmission where the shaft extends through the clutch housing to drive the belly pump which is also on this tractor. The big question, can this front countershaft bearing be removed and replaced through the clutch housing or will the whole countershaft have to be taken out through the transmission and the bearing pressed off the countershaft? Just don't know how this bearing installs to the countershaft and its replacement procedure. Thanks for sharing any information relative to this problem.

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riverbend

12-07-2004 20:27:40




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 Re: 1951 Farmall H Transmission Noise. in reply to farmallhal, 12-07-2004 16:31:13  
The bearings on the transmission driving shaft would be turning in all gears (including 5th) and neutral when ever the clutch is engaged (turning the drive shaft). The mainshaft pilot bearing would not be turning when the transmission is in 5th.

The pilot bearing runs directly on the driving shaft i.e. there is no outer race. Replacing the bearing before it fails completely could save the input shaft.

If you have a way to lift the top cover, you will find that the transmission is easy to work on. That would give you the best look at the gearbox, bearings, and give you a way to clean the chunks out of the bottom of the case.

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Dick in La.

12-07-2004 17:39:48




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 Re: 1951 Farmall H Transmission Noise. in reply to farmallhal, 12-07-2004 16:31:13  
I have a similar noise in my '39 H. I tore the transmission down, replaced most of the bearings in the transmission and differential, including the pilot bearing, and several gears. I still have the noise. Guess I will just live with it.



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ChadS

12-07-2004 16:42:34




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 Re: 1951 Farmall H Transmission Noise. in reply to farmallhal, 12-07-2004 16:31:13  
Remove the belt pulley, or the plate where it would be,, and have a look at the shaft, if that bearing is out,, you should be able to move it and see if that is what it is. H's are famous for breaking the bearing castings off the differential housing. the brake pinion shaft holds it up,, but it will rub, and grind in there, kinda sounds like a slight clunk when the tractor first takes off, or the brakes applied, it can also sound like a lite gear grind sound too. it will also act like the brakes are on for a split second till it moves,,,, if you have problems getting it into gear, or sticking in 2 gears,, you may have the pilot bearing in the top shaft out,, it would make a real bad clunking if that was out, from the shaft wobbling up and down and not allowing the gears to properly mesh. Hope this helps a bit,, torn quite a few H trannys up and rebuilt them, thats what ive always heard when they break,, ChadS

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williamf

12-08-2004 01:53:01




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 Re: 1951 Farmall H Transmission Noise. in reply to ChadS, 12-07-2004 16:42:34  
The right side bearing casting was broken off my H when I got it. I was able to replace just that half of the differential housing with a salvage yard part($125). I've never before known the name for the piece that was broken off; now it'll be easier to talk about.
Thanks,
Wm



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farmallhal

12-07-2004 18:18:48




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 Re: 1951 Farmall H Transmission Noise. in reply to ChadS, 12-07-2004 16:42:34  
ChadS, there is no sound like something is broke or any problems with in and out off gears. If the noise wasn't present you would think you had the perfect tractor. No jerking, clunking or clanging or any other strange sounds or pulsations. Sounds just like a dry or gritty bearing from what I can hear that increases or decreases with engine RPM's and the clutch released. No change in sound with the pulley turning - no load of course.

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Andy Martin

12-08-2004 05:36:10




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 Re: 1951 Farmall H Transmission Noise. in reply to farmallhal, 12-07-2004 18:18:48  
You may just have normal Farmall gear growl. If so, nothing is wrong.



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Allan in NE

12-08-2004 15:07:32




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 Re: 1951 Farmall H Transmission Noise. in reply to Andy Martin, 12-08-2004 05:36:10  
I agree.

And, if the PTO should happen to be engaged too, then it really will hollar. Old sisters are just loud.

Allan



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ChadS

12-07-2004 19:44:59




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 Re: 1951 Farmall H Transmission Noise. in reply to farmallhal, 12-07-2004 18:18:48  
Check the drive shaft coupler bolts, there is rubber washers that will wear out and make the shaft loose and rattle, you will have to drop the pump inspection plate to check them,, will sound like a bearing too! ChadS



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John M

12-07-2004 16:41:04




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 Re: 1951 Farmall H Transmission Noise. in reply to farmallhal, 12-07-2004 16:31:13  
Easy job,remove the drive coupling,take off the drive dog,remove the three bolts and out comes the bearing.The upper one can be changed the same way,but the pump will have to be dropped and the drive shaft moved as far fowrd as you can get it.The constant mesh gear and housing is alittle bit of a pian to work around everything,but it can be done.



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Farmallhal

12-07-2004 19:10:40




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 Re: 1951 Farmall H Transmission Noise. in reply to John M, 12-07-2004 16:41:04  
John, thanks for the post and from what I read the bearing must just be a slip fit on the countershaft - is that correct? It isn't pressed on or special removal tools required I'm guessing from your post. I'm reading just get the belly pump drive shaft out of the way and remove the bearing cage and don't let it hit you in the face. Of course the belly pump drive link has to come off as well. I'm also guessing the transmission fluid needs to be drained also - is that correct? I've never been there before is the reason for the clarifying questions. Thanks again.

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John M

12-08-2004 01:56:07




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 Re: 1951 Farmall H Transmission Noise. in reply to Farmallhal, 12-07-2004 19:10:40  
You might have to pry a litle to get it otu.Youll see when you gett he cage off.Yes,the trany will have to be drained at leats some,but I would go aheaed and chage it.



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