Farmall H Transmission Issue part 2

Paul f

Member
A few weeks ago I posted a question about a transmission problem on a friends Farmall H. The advice given here was that there was probably a bearing issue on the main shaft. Turned out to be spot on, thank you all. As you can see from the pictures there wasn’t much left of the bearing that is inside the input gear. I got a new bearing and replaced the input gear with a new one. She is all back together and the tranny works in all gears.

However there is a lot of gear whine in all gears. I am thinking this may be a factor of a brand new input gear interfacing with worn gears and that the other gears had worn some because the main shaft was not in good alignment because of the bearing failure. The new bearing would change the mesh of the older gears. That whine is probably acceptable as the gentlemen would only use the H for raking and a bit of other light work. (Nor can he afford all replacement gears)

More worrisome is a new issue, you cannot push the tractor backward more than a foot or so before it sort of locks up. You can roll it forward as far as you want but not backwards. This is true with the tranny in neutral and the clutch engaged or disengaged. You can start her up and shift into forward or back and there is no problem. (I haven’t tried to really push hard backwards as last fall I tried to roll my Farmall M a foot or two an ruptured my Achilles tendon, not want to do that again)

The transmission shifts through all the gears without any grinding or bad noises other than the whine when you are moving. Neutral is quiet. Any thoughts on what II should look for???
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Paul,

Are you sure that you got all the bearing rollers out of transmission and final drive gears? I would drain the oil, remove the PTO and do a thorougher inspection of all gears and teeth. Jack up each rear wheel and get someone to turn the wheel forward then backwards while you inspect before you remove the top again.
 
The transmission uses straight cut gears which are just naturally noisy, and coupled with the fact that the newest H is over 60 years old now, there gears are bound to be worn which makes them whine all the more.
 
The clearance between bull gears and transmission bottom is pretty close, would think a bearing roller might get caught there.
 
Roller Bearings (like on the outer end of the rear axle) can roll forward well then get crossed up when turning in the opposite direction. Jim
 

Just for grins and giggles, pull the brake covers and have a look. You might just find that a brake band is coming apart and rolling itself up when the drum turns backward.
 
(quoted from post at 06:42:16 09/14/16)
Just for grins and giggles, pull the brake covers and have a look. You might just find that a brake band is coming apart and rolling itself up when the drum turns backward.

This would be my first step.
Also, what weight oil are you using? 85W140 will quiet up that H a bit, but I wouldn't recommend it for really cold winter operation below about 15F unless you hit it with a block heater beforehand.
My 1950 has pretty quiet gears as it appears to have had relatively little use since it was new in 1950. Or it wasn't really ever used hard. With 85W140 in my 1950 H, the gears make almost no sound.
 

Gentlemen: Thank you all for the input. I shall start with the brakes . I completely drained the transmission and rear end. Rinsed it with Kerosene and searched very hard for errant bearing parts, sweeping under the bull gears with a brush and a magnet. I think I got all that were still in the rear end out.
 
I replaced all of the bearings in the trans on an H this summer and still have a growl.

BUT-I replaced a couple of gears with better looking used ones and I assume the growl is coming from the straight cut gears not being used to each other. I plan to just use it to run my log splitter and other light work so it's no big deal.
 
Thank you all yet again!!! Turns out is was the right side brake dragging and tightening up when I rolled her backwards. (as I said I wasn't pushing really hard as I do not care to repeat my Achilles Tendon rupture)

I was not looking forward to having to pull the tranny cover again. This is a relief!!

The owner will just have to listen to the gear whine, I had already topped her off with 90w may drain some and put in some straight 140...or i could go old school used car dealer and dump in some sawdust :p

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Don't worry about the gear whine. You've been in there and you know the bearings, etc. are all good. Just fill it up with 80w-90 and be happy.

I own a 1940 H that has some gear whine. I know for a fact that the previous owner did a LOT of work in the transmission just before his health failed and the tractor was parked. I've owned this tractor for at least 16 or 17 years. It gets regular use because it is equipped with a belly mower. In all those years, the whining noise has never got worse. It just keeps on keeping on.
 

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