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John Deere 140


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#1 Bob IN OFFLINE  

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Posted May 26, 2014 - 04:37 PM

I picked up a john deere 140 in a trade. It runs good, but im having a problem with forward/ reverse. Its either sitting still or full speed ahead. And very hard to get into the neutral position. What I mean is it will say its in neutral but it will still drive. I looked at the linkage you can see with out the seat pan coming off and it isn't worn out. Is there more linkage under there or is it the pump? Checked the fluid level and it was fine. The only thing I did notice is I had atf fluid in it. Will this hurt the pump?



#2 olcowhand ONLINE  

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Posted May 26, 2014 - 04:40 PM

Early model with HydroGear, or later with Dana differential?



#3 Bob IN OFFLINE  

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Posted May 26, 2014 - 04:43 PM

I believe its the hydrogear.



#4 olcowhand ONLINE  

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Posted May 26, 2014 - 04:49 PM

ATF is correct, but other oils will work fine, and maybe better.  30wt motor oil is good.  I am not familiar with your linkages.  Does the neutral position change?  If it does, then the pintle pins inside could be broken & just friction is doing any speed changes.



#5 Bob IN OFFLINE  

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Posted May 26, 2014 - 04:57 PM

ATF is correct, but other oils will work fine, and maybe better.  30wt motor oil is good.  I am not familiar with your linkages.  Does the neutral position change?  If it does, then the pintle pins inside could be broken & just friction is doing any speed changes.

The neutral position doesn't change. If your going forward you have to go past neutral into the reverse range and then into neutral and then it usually stops.



#6 JDBrian OFFLINE  

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Posted May 26, 2014 - 05:26 PM

It is probably the linkage gummed up or out of adjustment. The ser. No for the change to the Dana/Sundstrand rear end is at 30000. 


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#7 propane1 OFFLINE  

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Posted May 26, 2014 - 06:25 PM

I have a service manual, but dose not show your problem in the diagnostics part. Type F fluid is correct for serial # 0 to 30,000. Noel

#8 superaben OFFLINE  

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Posted May 26, 2014 - 10:15 PM

Do those have a return to neutral spring of some sorts?  I'm trying to picture how Deere hooks up the linkages. 

 

Ben W.



#9 Trav1s OFFLINE  

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Posted May 26, 2014 - 10:16 PM

Do those have a return to neutral spring of some sorts?  I'm trying to picture how Deere hooks up the linkages. 
 
Ben W.


No spring that I know. At least on the later hydro.
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