I have a 1.5 year old John Deere 3520 tractor with a 300 CX loader. It is a hydrostatic 4x4 model. Ever since I've had the tractor the tranny whines a lot and the loader and three point lift are very jumpy. I brought it back to the dealer several months ago and they said they couldn't find any problems (classic response), however they did change the hydraulic fluid and all filters.
The tractor still has the same problems. When you raise the loader it is very jumpy and makes a lot of whining sounds. When the three point hitch is raised with a load it will slowly lower a couple of inches over a few minutes and then bump back up on its own. Its almost like it is losing pressure slowly and then all of the sudden a valve or something changes and the fluid surges back through the system. Any suggestions on the matter would be greatly appreciated.
The tractor still has the same problems. When you raise the loader it is very jumpy and makes a lot of whining sounds. When the three point hitch is raised with a load it will slowly lower a couple of inches over a few minutes and then bump back up on its own. Its almost like it is losing pressure slowly and then all of the sudden a valve or something changes and the fluid surges back through the system. Any suggestions on the matter would be greatly appreciated.