5075E Hydraulic / transmission freeze and thaw. -linkage

[k0ua]

Good point K0ua about the hydraulic system sucking air/moisture.
My usage also tends to be logging activities which is very intermediate usage, and a lot of stop and go, idling. I try to keep it fast rev’d, but hydraulic/trans oil problem doesn’t get very warm.
The warmest that oil gets is probably from a few hours of rotary mowing in the summer. Did less of that this summer.
I believe the oil is Deere Hy-Gard, I’ll have to find the pail, but I got the oil the dealer recommended when I changed it.
I’m going to change the filter and let a gallon or two of the oil at the bottom of the sump run out the drain plug. Can’t hurt right?
I was worried that some thing else beside condensate freezing would give me these symptoms.

I think you are on track. Hopefully it WAS ice in there not some chunk of metal.

As far as the water vapor/condensate method of getting water into our transmission's, I think a lot of it would have to do with where we live, what the humidity is and how we operate our machines. Obviously if we live in a low humidity area, and we operate our machines for long periods of times, the chances of condensate forming at all or accumulating are much less than a person that lives in a high humidity area and operates their machine such that the oil never gets very hot.

 

[CobyRupert]

Eureka!
Update: It was even colder today (teens), so I went and checked it out again. Without starting tractor, same thing happens. It won’t go into the gears (reverse and 1st) that are “below” the neutral positions on the shifter. Goes into 2nd and 3rd “above” the neutral passage just fine. Hmmm...why would that be, if I’m getting ice at the bottom of hydraulic oil in trans?
Yesterday I thought it was an external linkage problem given that 2 “up” gears worked, and 2 “down” gears on shifter didn’t.
Today, I thought I could hear or feel “crunchiness” at shifter, or at top of trans.

I don’t know much about transmissions, but started wondering what actually defines the positions/ slots where a shifting lever moves (or in my case doesn’t move)

I suspect whatever is inside this green enclosure at the bottom of the shifting lever where linkage is redirected horizontal into transmission is the problem and has water in it. I heated it with a blow dryer for two minutes and then could easily shift into all gears.
I’ll take the cover off the bottom of it when I change the filter and see what leaks out.

The boot is good, but I did have to replace it maybe 6 years ago. Weird that this was never a problem any of the winters since then.

 

[LouNY]

Well that sounds a whole lot better then getting ice inside the transmission.
Have you had that bottom cover off before?
If it's just a cover or a support for and shift rails could make a difference.
Have you seen an exploded picture of that housing?
Good luck with her it's starting to sound like you may be needing her tomorrow.

 

[LouNY]

This link may take you to the JD page for the shifter case;
https://partscatalog.deere.com/jdrc/sidebyside/equipment/63200/referrer/navigation/pgId/461966345

Or this pdf has it.
View attachment JD shifter case.pdf

 

[CobyRupert]

This is the schematic I find at
https://partscatalog.deere.com/jdrc/sidebyside/equipment/83200/referrer/navigation/pgId/394913944
I don’t really see what is going on in such a large enclosure. I’m guessing maybe the shift lever (4) attaches to horizontal shaft (24) through the arm (19)? Maybe large enclosure is for the guide (20) that directs the shift lever? Hopefully nothing falls out if I take bottom cover off.

 

[CobyRupert]

Guess we were both looking at same time. Looks similar.

 

[CobyRupert]

Follow up:
I loosened the bolts on the bottom cover plate and let oil (and water?) drain out. Not wanting anything to fall out, I didn’t take cover off, so I hope that when oil ran out it flushed the “cup” of the bottom cover.
There might of been some water. Maybe a little milky, but I couldn’t really tell. I should of collected it in a pan instead of letting it disappear into the oil container.
Hopefully that did the trick, It got cold that night, and no problems since.

p.s. Is there any way to change title of this thread to include Deere 5075E, in case this happens to others?

 

[the old grind]

Title seems enough to be searched for if not just meant for Deere owners.

At least the thread isn't titled "What happened?" as would often be found on TBN.