Hydraulic leak while running on JD 4020

   / Hydraulic leak while running on JD 4020 #1  

Danny Barnett

New member
Joined
Oct 6, 2013
Messages
1
Location
Searcy, AR
Tractor
4020 JD, 1530JD, 4230 JD, 4840 JD, 4430 JD, 4850 JD
I have a '65 4020 that leaks down on the 3 pt. hitch while using implements. Is this the rockshaft control valve and what will it take to stop the leaking down?
 
   / Hydraulic leak while running on JD 4020 #2  
Leak down could be control valves leaking from not seating,piston seal or thermal relief valve leaking. Easiest thing to check is the piston seal by removing the cover in photo and replacing piston seal.
 

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