Hi all. Been awhile since I posted so bear with me. I have a 301a diesel that I'm having so problems with. It has no reverser or shuttle and just has a two stage clutch for pto. My problem is I have some hydraulic shutter in the 3 point and it has hard time keeping a steady depth no matter what draft control is in. Sometimes when 3pt is like in the middle of its stroke the tractor Engine is laboring, and you either have to raise it all the way up or down to eliminate laboring.This machine has had John Deere hydraulic oil in it since new. All screens and filters are clean. My standby pressure is at 1750 testing at scv. It looks like a might have a hint of oil spray through the oil fill hole. I have a parts book but am unclear what part numbers I need to re seal rockshaft. If someone could tell that would be great. Also how do you test the transmission pump an easy way? Also how do you make sure the scv is not leaking by. I have tech manual but it is very vague in descriptions and shows all kinds of special equipment to test. Thanks to all that reply. Hopefully this doesn't turn into a big game of cat and mouse.[/b]