Jonathan Wurz
Well-Known Member
Yes I did, I replaced the relief valve so unless I messed something up it should work fine, but the P3 pressure only goes down to spec after it is heated up to 180 degrees.Have you been into the converter inlet relief valve and inspected the internals.?
The TC inlet pressure should not rise above 130psi, even with cold oil. The function of the IRV is to control that pressure.
I have been trying to confirm or disprove my theory of the oil foaming from being sprayed through the relief valve at 200 psi. I was alternately driving the loader and letting it idle for 20 min every time I drive it the oil is cooled to about 110*F. After driving the the oil is aerated, but if it idles for 15 min, the oil has absolutely no bubbles. This could probably still be a suction leak that doesn't leak at low RPM. I will road the tractor to check the oil after running at high RPM with the oil at operating temperature.
I assumed it would help lower the pressure when the oil is cold.Either way I think it's a bit of a red herring because the only function of the valve is to bypass the powertrain oil cooler when the oil is cold.