i have a Kobelco SK235 -2 that as you lift the boom the arm comes in as if there is leakage in the ram. but the strange thing is that it also brings the arm in when you try to take it out. ( occasionally ). When it does respond and go out it is only very slowly. Any ideas out there.
Good day Wazza Plug the arm hose's with pressure gauge and see what response you get when you raise the boom, that way you can decide where the problem is. Kind regards Uffex