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John Deere 3020 - Hydraulic Filter Cover Seal Leak

G

Glen D Anderson

Member
Good day all!


So, been having trouble getting the hydraulic filter cover to seal up on our early MY synchro 3020. Tends to just weep in the summer but turns into a fast drip during cold weather operation.

Thought I had it figured out the last time it was apart as someone(likely me) had installed the smaller seal used in the later model tractors. This machine is equipped with the R26319 filter cover that doesn't have the lip / step for retaining the seal like the later machines, so I installed the larger R39596 seal to no avail. I had also looked closely at the cover and the trans. case for imperfections or cracks at the time and didn't notice anything but may have missed something?

Planning on taking apart again and have magnifying glass close look at the cover and case and if nothing is obvious maybe track down a later MY filter cover with the step(R39794)....

Thoughts?
 
TTT

Happy new year all!

It seemed obvious to me when I made the original post but then I thought I should clarify that the leak is coming from the filter cover to trans. case connection. Not between the bolt & filter cover.

Also, the seal area was perfectly clean and free of nicks / burs or old gasket material.
 
If somebody in the past has had the cover jammed sideways and then super torqued in an attempt to stop the leaks .
Good luck because the cover is warped.
36 - COVER
Part NumberR39794
Qty Req1
Remarks(ALSO ORDER R394R, R34733 AND R54750) (SUB FOR R26319)

This post was edited by buickanddeere on 01/01/2022 at 11:12 am.
 
Thanks B & D.

The cover is casted so it seems unlikely that it would distort instead of just breaking but you raise a good point. Maybe the sealing face on the cover is significantly out of plane & the seal just can't take up the difference?

Guess I'll pull the cover off and set it on the piece glass I use for lapping and have a look.....
 
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