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John Deere M Touch O Matic overflow?

F

FrozenNuts

New User
I have a JD- M that after a few cycles of the control lever spews oil out the filler cap under the seat. I have tried filling it to the test cock level with the unit in both full up and full down positions. It makes no difference. I have the service manual and it gives no troubleshooting info on this issue. I am looking for input from someone who has actually worked on an M TOM unit. Thank you.
 
I wonder if it is sucking air in at one of the suction pipe fittings ? I had a 430 doing that.
 
As was mentioned you are most likely
pulling in air at one or all of the large
suction line fittings. There are rubber
seals in each one. You might get by with
just tightening them all up but they are 70
years old now so you might want to think
about replacing them. They aren't very
expensive from Deere.

Another possibility is it's bypassing
inside. Using the wrong oil will make it
worse. I use 20 or 30 wt non detergent
motor oil. It won't foam, works better and
leaks less than anything you can put in
there. It's in the motorcycle section at my
local Advance auto parts.
 
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