Hydraulic lift hicups

[WillieLandini]

I have an Mc cormick International 434. The hydraulic lift has hicups and lowers by itself when tractor is not running. Unless I close the valve on the front of the lift cover then the lift stay up. Anny idea where I can start looking for problem pleas?

 

[DLTTrekkers]

Will help u .

 

[DLTTrekkers]

 

[DLTTrekkers]

see at top right ...thats where that piston with the small spring going in....you need to make a punch to remove that to replace all those o-rings ....some outside and one in one off those valvespacers

 

[DLTTrekkers]

messure the tip protruding from the casing to reinstall to the same lenth

 

[DLTTrekkers]

 

[DLTTrekkers]

Now uyou can see all the valves in that hydraulics. The o- rings I am talking is on the inside of number 15

 

[DLTTrekkers]

 

[DLTTrekkers]

 

[DLTTrekkers]

non-return valve is no 7