TC35D 3PH extremely weak

[tractorblue]

TC35D 3PH extremely weak; first off, hydraulic fluid has been checked; just replaced both hydraulic filters (HST). The 3PH has been intermitent at times as far as having issues, symptoms were slow to raise, raising and lowering (pulsing as it goes up), not raising to full height. Without any implements the 3PH will raise at a reasonable rate to full height but with a box blade or mower it will not even budge abit. I have inspected the relief diverter valve and replaced O-ring (it all seemed fine) in fact i added a new thin shim (50 PSI increase) {learned this on other threads} I do not own gages (not a hydraulics kinda guy). The PTO works as well as hydrostatic steering so it would seem the pump is in good shape. I actually replaced it about 150 hrs ago. Please feel free to weigh in, I'm at a loss. Thanks!

 

[3Lfarms]

Does it have a loader, or remotes installed? Those can divert pressure upstream from the 3pt and prevent it from working.

A gauge is what is needed to ensure the 3pt is getting enough pressure. If it’s getting full PSI, then it has to be in the 3pt control or the rockshaft seals.

 

[tractorblue]

It does not have a FEL or anyother remotes. The hyd. manifold switch is in the correct 2 oclock position. I replaced the 3 way rubber hose on the hydraulics line thinking it may have rotted and was sucking air but was'nt the problem. when you say "has to be in the 3pt control" are you referring to the position control linkage adjustment that adjust the height of the 3PH ?