Growing noise from rear

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Growing noise from rear

Postby Pkl69 » Tue Aug 14, 2018 1:34 pm

I have a 1969 cub it makes a growling noise from rear when pto is on it gets quite very little noise any guesses on what it could be checked pto bearing seem fine been greased .any help would be appreciated

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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
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Re: Growing noise from rear

Postby Glen » Tue Aug 14, 2018 4:32 pm

If the noise is only when the PTO is on, and it is coming from the rear, the PTO bearing is probably making the noise.
How much has the PTO been used over the years, little, or lots.
I have seen the same problem, the old ball bearing looked perfectly good when removed, and inspected. It was used a lot, and got so it made noise. A new bearing ran quiet after replacing it.

Below is the Cub service manual. The PTO is in section 6A, I would suggest reading it before working on the PTO. The belt pulley shown there is a separate unit. Disregard the info for it, if you don't have it. ... index.html

If you replace the bearing, I would replace the oil seal too.
The modern oil seal may be thinner than the original was. I don't know what thickness seal they used originally in 1969, but in the 1950's they were thicker.

Below are PTO parts at TM Tractor you can look at.

Below are all their PTO parts, they go about half way down the page.

The PTO pilot bushing needs checking when the PTO is out of the housing. It is at the front of the PTO shaft, in the rear end of the long clutch shaft. The PTO won't work right if the bushing is wornout, people on here have said before.
Grease the end of the shaft, and inside the pilot bushing, before putting the PTO in.

Below is a pic of the pilot bushing in the end of the clutch shaft. :)
Cub trans shaft 7.jpg
Cub trans shaft 7.jpg (11.37 KiB) Viewed 194 times

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