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1955 660 transmission leak

T

Tefer2

New User
The gear shift seal on the 5 speed transmission was letting rain water in. This tractor was stored outside by the previous owner resulting in chocolate milkshake colored fluid.
I've drained the fluid and left the plug out for a couple of days.
Looking for advice on how to clean the remaining old fluid out.
Someone suggested adding fresh fluid and driving the tractor around and then draining it again. Is there anything safe to put it there besides UTF.
 
There is no seal on shifter on 5 speed trans. The way is made there is no way rain can get in. Condensation is the culprit.
 


Yup, condensation. Not the PO, you. Especially if you are using UTF. if you use 80-90 gear oil instead of UTF the moisture will stay on the bottom where you can eliminate it once or twice a year by just cracking the drain plug and letting it run out.
 
I've only owned this tractor for a week, so all problems are from the previous owner. The master parts catalog does show an oil seal below the spring on the shifter shaft. Fig.7B2 NDA7288A.
I noticed some oil seeping where the shifter hosing meets the the cover plate. This is what made me believe that water could enter the case.
Your comment leads me to believe that UTF collects and retains moisture from condensation, where 80-90 gear lube does not.
I plan to use the recommended ford lubricates when refilling.
How to remove most of the contaminated UTF before adding the gear lube is another problem.
What do all the folks that use UTF in all three compartments do?
Change the fluid every fall?
 
(quoted from post at 06:25:06 04/21/21) I've only owned this tractor for a week, so all problems are from the previous owner. The master parts catalog does show an oil seal below the spring on the shifter shaft. Fig.7B2 NDA7288A.
I noticed some oil seeping where the shifter hosing meets the the cover plate. This is what made me believe that water could enter the case.
Your comment leads me to believe that UTF collects and retains moisture from condensation, where 80-90 gear lube does not.
I plan to use the recommended ford lubricates when refilling.
How to remove most of the contaminated UTF before adding the gear lube is another problem.
What do all the folks that use UTF in all three compartments do?
Change the fluid every fall?
Click to expand...


Yes, there is a seal there, but it is to keep oil from pushing out. Rain couldn't get in because it would have to go up an inch or two first. I rinsed a transmission out one time by pouring fuel in all around the gears but that was with the cover off. A gallon of fuel then rocking it back and forth should rinse it pretty well. Since the transmission has UTF most likely the hydraulic compartment does as well. Plain cheap hydraulic oil will work well in there. The change interval with UTF depends on the usage. If it is run under enough load for long enough periodically the moisture gets driven out by the heat that is generated.
 
I do believe that shifter oil seal could use replacing also. There seems to be slight amount of fresh oil setting in the ring of the cover. I have more important issues so that job will have to wait.
I plan to refill the transmission with cheaper fluid, then drive it around till hot and mixed up. Then drain it out.
Thank you for all the help, the knowledge base of the members in here is priceless.
 
After cleaning years of old grease and dirt from around the top cover of the 5 speed transmission, it appears the sleeve that the gear shift shaft slides over is loose.
I can easily spin it around with two fingers and it has 1/16 movement side to side. Is this a pressed in sleeve or is it made into the transmission top cover? There is no part number for it and it is shown as part of the top cover in the diagram.
 

cvphoto86020.jpg
 
It appears that there may be some threads at the bottom of the sleeve in the posted image. Is it possible to just tighten it up?
The fluid was at the proper level. If oil can be slung out of the loose sleeve, I still think water can also inter through it.
 
(quoted from post at 06:12:12 04/23/21) It appears that there may be some threads at the bottom of the sleeve in the posted image. Is it possible to just tighten it up?
The fluid was at the proper level. If oil can be slung out of the loose sleeve, I still think water can also inter through it.
Click to expand...


Neither of mine have had any looseness to them so I have never looked at tightening them. When the tractor is running and more so when moving, oil is trying to shoot under pressure straight up around the selector shaft. Some will get past the seal and hit the bottom of the lever and dribble down on the outside. That happens with one of mine. I don't see rain being able to shoot up because it is not under pressure. Even in a driving rain at just the right angle it is still just deflected off the cover surface. Two very different scenarios.
 
(quoted from post at 06:30:24 04/23/21)
(quoted from post at 06:12:12 04/23/21) It appears that there may be some threads at the bottom of the sleeve in the posted image. Is it possible to just tighten it up?
The fluid was at the proper level. If oil can be slung out of the loose sleeve, I still think water can also inter through it.
Click to expand...


Neither of mine have had any looseness to them so I have never looked at tightening them. When the tractor is running and more so when moving, oil is trying to shoot under pressure straight up around the selector shaft. Some will get past the seal and hit the bottom of the lever and dribble down on the outside. That happens with one of mine. I don't see rain being able to shoot up because it is not under pressure. Even in a driving rain at just the right angle it is still just deflected off the cover surface. Two very different scenarios.
Click to expand...

I agree with your thoughts on the oil dripping down the shaft.
I will replace the shaft seal and hope that solves the problem.
I now also agree that the moisture combined with the fluid is from condensation and not a rain water leak.
I will reply back to this topic after I replace the seal.
 
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