Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

john deere 120 implement control valve?


  • Please log in to reply
3 replies to this topic

#1 oliver2655 OFFLINE  

oliver2655
  • Member
  • Member No: 26808
  • 37 Thanks
  • 82 posts
  • Location: northern indiana

Posted December 28, 2014 - 12:48 PM

i have a john deere 120 that drives okay forward but when in reverse the hydrostat seems to cut in and out and surge. fluid level is fine. has anyone came across this problem? i was told my problem is the implement control valve? where is this valve located?



#2 Trav1s OFFLINE  

Trav1s

    Got points?

  • Senior Member
  • Member No: 5472
  • 2,603 Thanks
  • 3,750 posts
  • Location: Cedar Rapids, IA

Posted December 28, 2014 - 03:28 PM

More than likely one of the free wheel check valves located below the seat pan on top of the pump is stuck open.  I faced a similar problem with my 120 when I did the restoration work.  Do you have a service manual?


  • johndeereelfman said thank you

#3 oliver2655 OFFLINE  

oliver2655
  • Member
  • Member No: 26808
  • 37 Thanks
  • 82 posts
  • Location: northern indiana

Posted December 28, 2014 - 08:04 PM

are those check valves repairable? or does it just have to be replaced?



#4 Trav1s OFFLINE  

Trav1s

    Got points?

  • Senior Member
  • Member No: 5472
  • 2,603 Thanks
  • 3,750 posts
  • Location: Cedar Rapids, IA

Posted December 29, 2014 - 08:24 AM

They are repairable - generally people soak the little button on top with PB Blaster and let them sit.  I worked them up and down with a screwdriver until the moved smoothly and freely.  Some also pull the valves and soak them on the bench.


  • johndeereelfman said thank you




Top