Hello! This question is in regards to the tractor in my signature. I am new to this forum but not new to old tractors... However, this is a problem I've never encountered before. I think something is wrong with the hydraulics but never having owned or operated an M before I'm not completely sure. In short, it lacks the lifting power I think it should have and it is very jerky while under load (a 400# finish mower). Lifting anything heavier than a back-blade results in a groaning/whirring sound from the front of the tractor. Sometimes under a low to mild load the TOM system seems to 'gurgle'. The fluid appears milky, as though it has been aerated.
The conclusion I have come to is that my pump is bad although if there is a way to bleed air out, I'd like to try that before I replace the pump. Any other ideas or am I on the right track?