MF 158 3 point lift drifts down

[Baruch Erez]

A question for you guys: My MF 158 3 points hydraulics lift drifts down when the diverter valve gives pressure to the external component, and there is a load on the 3 point lift. Before I go ahead and try to replace rings on the lift piston, is there something else that may cause it?

 

[FordnMassey]

Hi Baruch,

Your thinking is sound to me, but I'm working off first principles not experience on a 158. If it's drifting down after the diverter is switched, then there's a leak between the diversion point up to and including the piston/cylinder. Given the piston/cylinder is the only moving component in those parts, I would look there. I'm guessing that means lifting the top cover. I've lifted the cover on 35 using a chain block, mostly so I could lower it carefully when refitting.