L3430 HST not operating

[mfgkenney]

Hello all,
Started digging into my other government surplus tractor. So far it only moves in low range with the engine at maximum rpms. It's movement is jerky, especially moving forward. The 3pt and front hydraulics work as designed, and my hst filter is new. Oil level is good. Any ideas of what I'm dealing with, based on the videos below and my description? When I get a chance, I am going to check my charge pump pressure.

Thanks,
Matt https://youtube.com/shorts/nNo15fdY2OA?si=rSrNQE4X8wPveWPK

https://youtube.com/shorts/vSzSI_hV4fc?si=M_I-x6qoCfMxn7jd

https://photos.app.goo.gl/snARj7bribBBFvhLA

 

[North Idaho Wolfman]

See what the PTO is doing when you try and move it in high range.
If it stops spinning you have a toasted clutch!

 

[mfgkenney]

So i tested the pto in high range, and it seemed to operate as normal. I did the charge relief valve test and high pressure relief valve test. My charge relief valve pressure was high, at just below 1200 psi (factory spec 327-355psi) and my high pressure relief valve came in low at 4200 psi (factory spec 4856-5262psi). I didn't see any procedure for testing my charge pump pressure in the wsm, nor could I find a procedure for shimming the valves. It talks about the pressure difference for shimming, but it doesn't say whether or not the pressure change would increase or decrease my pressure. I would think that it would decrease the pressure as it is adding a pre-load to the spring. Does that make sense? Any thoughts?

Thanks,
Matt