Zetor Proxima 90 hydraulic lift arms wont lower unassisted.

[jimchalmershotmailcom]

The hydraulic lift arms on my 2012 Zetor Proxima 90 will not lower unless there is weight on them. When using implements this is not a problem because they have sufficient weight to lower arms. However when no implement is attached or when using the pick up hitch the arms wll not lower without a considerable weight being put on them. i.e. i have to stand on the arms to lower them.
I have checked all the control levers and they appesr to be working correctly. The tractor has been regularly serviced and has done approx 1000 hours.

 

[ixer0]

Hi,

Your tractor should be new enough to have the Mita hydraulics. They don't have the internal lift cylinder, just the 2 large rams on the outside. They are prone to corrosion in the seal area making the rams go tight. If they don't go down when you loosen a pipe, it's the rams.

Mike