Just got the chance to try the hose out, and I'm pretty sure it confirmed my guess. I used the flow hydraulics and no matter what it would load the tractor. I did take not though that with them flowing in one direction the hose would stiffen as if the fluid were in the lines and in the other it would empty, telling me that the problem lies within the return QC. I believe it is the top left that is having the problem.
If I were to need a new QC, how would I go about changing it?
If I were to need a new QC, how would I go about changing it?