Kubota LX4020 Suspension Seat Fail

[rancher1524]

I purchased my Kubota LX4020 HSD about 2 years ago. From the first day the suspension seat did not work. I returned the suspension unit to the dealer for repair. The dealer was unable to get the suspension seat unit to work. They ordered a new one under warranty. When it arrived I installed the new suspension unit and it worked great for a year. A few months ago I noticed it was not working again. Removed the suspension unit and tried to free it up with penetrating oil. After clamping it in a vice and repeatably extending and retracting the suspension unit it moved slightly. I returned it to the dealer and they could not get it to work either. So they ordered me another suspension unit under warranty. Has anyone else with a LX4020 had a similar problem with their suspension seat. The dealer thinks the tolerances of the moving parts of the suspension seat are to tight.