Johnsdeere
Member
JD 4230 with Syncro Trans. I have posted in the past about Hyd's slow. Had the JD tech out and tested the pressure for the clutch port etc. Trans lube pump is putting out 118 lbs at high engine rpm. Should be more like 180 lbs. We checked the relieve valve it looks good and well as the gasket, o rings for the trans pump and tubes. Pulled the trans pump out and it has some wear in the bushing to pump housing. Hasn't tore the pump housing side walls yet but there are marks in it. The bushing is pretty wore. To re bush the pump it will be $400 at a machine shop and it with still have wear to the housing. A replacement JD pump will be $900 if I can get the parts separate. It uses the AR62938 housing and the AR61290 gears that seem to only fit the 4230 syncro, not available aftermarket and hard to find not to mention expensive. I tried the Quad range pump wont fit.
Question how much wear is to much in these trans pumps before it causes problems?
Does anyone know what tread the test ports are on the clutch valve housing for testing the pressure. I cant find a fitting that is the same thread? The John Deere tech cost me $600 for a 30 minute test.
Question how much wear is to much in these trans pumps before it causes problems?
Does anyone know what tread the test ports are on the clutch valve housing for testing the pressure. I cant find a fitting that is the same thread? The John Deere tech cost me $600 for a 30 minute test.