I have an older 30hp Kubota with an aftermarket FEL that is driving me batty--the cylinders that control the curl of the bucket keep going out completely or intermittently----by that I mean that the bucket will act as though one of the seals is bad but it seems to fix itself later---I have replaced seals numerous times before I noticed that with continued use it seemed to fix itself---I would appreciate any feedback that would help me understand this problem.