PTO Drive Loss

A simple circlip failure was responsible for causing a pto pack to stop driving on all JD tractors.

The tractor had been running a big square baler and the jolting caused the clip to snap.

This led the internal lubrication valve on the clutch pack to move, dumping all the oil out of the system every time drive was engaged.

The part cost just 3 USD

It involved dropping off the pickup hitch assembly, draining the back-end oil and removing the pto housing, before accessing the clutch pack.