Branson1822
Active Member
I really didn’t see anything looks like as little wear on a couple valves
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1984 jd 640 transmission problem
- Thread starter Branson1822
- Start date
Branson1822
Active Member
I cleaned up everything polished everything everything was put back together and still the same problem
Diesel Dave
Senior Member
I think you need to flow test the transmission pump. It will be a verification that the pump is capable of producing 180 psi.
New pump spec at 1500 rpm is 11.5 GPM (minimum) at 180 psi.
Used pump spec at 1500 rpm is 10.5 GPM (minimum) at 180 psi.
Deere uses a fancy tool to put in place of the transmission filter element, see below.
.
New pump spec at 1500 rpm is 11.5 GPM (minimum) at 180 psi.
Used pump spec at 1500 rpm is 10.5 GPM (minimum) at 180 psi.
Deere uses a fancy tool to put in place of the transmission filter element, see below.
.
Branson1822
Active Member
How would you do it without the tool
Diesel Dave
Senior Member
Not sure.
Branson1822
Active Member
Ok I’ll see what I can come up with. There’s not really much more that could be wrong is there?
Diesel Dave
Senior Member
Just need to try and confirm or eliminate the transmission pump as the source of the problem.
Branson1822
Active Member
Ok will do thanks again