Transmission losing oil at the brakes.

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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cotton1964
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Transmission losing oil at the brakes.

Postby cotton1964 » Sun Mar 21, 2021 7:20 pm

How hard is it to put seal where axle houseing joins transmission . I have a leak coming from the brakes area on both sides . Thanks any help I will appreciate.

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Re: Transmission losing oil at the brakes.

Postby Lt.Mike » Sun Mar 21, 2021 8:04 pm

Check your trans oil color. Quite often when water enters the trans it causes it to overflow over the rear finals. If that’s the case you’ll see contaminated oil looking like a milkshake. Drain and refill. Back in business.
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Re: Transmission losing oil at the brakes.

Postby Barnyard » Sun Mar 21, 2021 8:25 pm

The seals are not made to keep oil in, they are there to keep dirt out. Do as Mike suggests and your problem should be solved.
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Re: Transmission losing oil at the brakes.

Postby papajohn » Sat Apr 03, 2021 7:00 am

To answer the question the OP asked...
It is not hard to change the seals but time consuming. However, the phrase "how hard is it to do X" is subjective depending on you wrenching skill and willingness to dive into a project.

You will have to jack up/block up the tractor rear end, drain the trans oil, remove the rear wheels, axle housing tube from the transmission case, final drive and axle. I recall it's a bit easier to get to all this if you remove the seat and seat mounts. It's a good time to check the brake bands while you are there.

Check here for the parts diagram. Part 2, scroll about 2/3 way down to get to the rear end section. You should be able to tell what needs to come apart.

http://farmallcub.com/[ Sorry, direct links to manual section is not allowed. ]/index.php?d ... al&order=0

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Re: Transmission losing oil at the brakes.

Postby Dale Finch » Sat Apr 03, 2021 8:16 am

This HOW TO is for the left side...the right side is similar, but as mentioned above, a bit more involved since it requires the removal of the seat and detaching the platform.

One seal that should also be replaced is the Differential Shaft Pinion Oil Seal:
http://www.tmtractor.com/new/df/044fp.htm
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Re: Transmission losing oil at the brakes.

Postby Barnyard » Sat Apr 03, 2021 9:38 am

papajohn wrote:To answer the question the OP asked...
It is not hard to change the seals but time consuming. However, the phrase "how hard is it to do X" is subjective depending on you wrenching skill and willingness to dive into a project.

You will have to jack up/block up the tractor rear end, drain the trans oil, remove the rear wheels, axle housing tube from the transmission case, final drive and axle. I recall it's a bit easier to get to all this if you remove the seat and seat mounts. It's a good time to check the brake bands while you are there.

Check here for the parts diagram. Part 2, scroll about 2/3 way down to get to the rear end section. You should be able to tell what needs to come apart.

http://farmallcub.com/[ Sorry, direct links to manual section is not allowed. ]/index.php?dirpath=./files/Farmall%20A,%20Super%20A,%20AV,%20100,%20130%20and%20140/Super%20A%20Manuals/Super%20A%20-%20AV%20Parts%20Manual&order=0

I would still drain and refill first to make sure an over full trans isn't the problem. Most of the time the seal is not the problem. Do the easy stuff before you dive into something you may not need.
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Re: Transmission losing oil at the brakes.

Postby Glen » Sat Apr 03, 2021 7:10 pm

Hi,
Dale, the link for the seal you posted above is for a Cub, he didn't say what model of tractor he has, but this is the A, Super A, 130 section.
I don't know if a seal for the Cub fits an A, Super A, I would think it is different. :)

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Dale Finch
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Re: Transmission losing oil at the brakes.

Postby Dale Finch » Sat Apr 03, 2021 9:08 pm

Glen wrote:Hi,
Dale, the link for the seal you posted above is for a Cub, he didn't say what model of tractor he has, but this is the A, Super A, 130 section.
I don't know if a seal for the Cub fits an A, Super A, I would think it is different. :)

Didn't even notice! DUH! The procedure would be similar, but no, the seals would be different. Sorry 'bout that! :wink:
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