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Farmall 140 leaking gear oil

P

PaulnNC

New User
I have a 140 (1979 model) that is leaking gear oil. We first thought it was coming from where gaskets might be on each side, but after cleaning it, the gear oil is leaking out of what looks like two 'weep holes' under the gear box towards the rear. Any ideas on what's going on and how to fix it??

Thanks,
Paul
 
Paul: The weep holes are designed to drain off any oil that leaks by the rear axle seals, before that oil gets to the brakes.

Check the fill to level plug first, the transmission may be over full. Read my instruction to Diana, about half page down. Fill to level plug is just below front tip of left fender. Kind of hidden behind brake activation rod.
 
Hugh,
Thank you for the info. We'll check it tomorrow. I'm a little confused as to how much gear oil is supposed to be in it. Are the gears supposed to be covered with oil in a 140?? And if it is overfilled... will it stop leaking when it leaks so much or is drained down? It seems to leak more when it has been run a while. One more question, how do I tighten the left brake band?


Thanks again,
Paul
 
Paul: Did you read what I told Diana about her 350 Utility. All IH tractors with that on top gear shift lever are prone to water getting in transmission.

The 140 transmission only holds 5 quarts. Before you start stripping tractor to change seals, bring it to the proper level, in may stop leaking. It's a big job changing those seals, all I'm suggesting is do the easy fix first. I can tell you, if you replace seals, and continue to run it over full it will still leak.

The brake asjustment is quite simple, length of activation pull rod from pedal to final drive housing. That will not cure it if you have a broken brake band. Final drive must come off to change brake band.
 
Hugh,
Thanks, I did read your reply to Diana. This tractor is never out in the rain though. One guy has suggested that I just fill it with grease insead of gear oil since I don't use it that much. Is this an option? What is a reasonable price to change seals, man here charges $2000.00???
 
Paul: If you put grease in there, probably will cost you big bucks. Have you even removed the fill to level plug, to see where the oil level is?
 
If you put grease in the transmission, you will not get proper lubrication and you will have a mess for sure. As Hugh says, check the level. If you can't get the level plug out, then drain the transmission and put back in 5 quarts. That is all it needs. If more than that, it's going to leak out the pinion shaft seals which is what you are seeing when oil comes out of the drain holes. I've seen these tractors filled with twice the oil they are supposed to have. The way the lub system in the transmission works is that oil is slung up by the gears into channels at the top of the case. The oil then drains by gravity back to lube the bearings. If you put grease, this system won't work and if the tractor works very much, bearings won't get the lube they need.
 
Paul: Perhaps I shouldn't have got hung up on how the transmission may have gotten over full. The bigger question here,"IS IT OVER FULL"? These tractors will leak even when all seals, shafts and bearing are in top shape if they are OVER FULL for some reason. For example a previous owner could have over filled it on purpose to make transmission quiet, during a sale. It could be over full because someone didn't know any better.

Early in this thread, you in fact asked if gear oil should be up over the transmission gears. Let me assure you, with oil that high in transmission, you'll have oil running out every shaft on transmission and PTO. As Haas said if you can't figure this out, "drain it and refill with 5 quarts". By the way, you best get a manual.
 
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