/ Loader pressure test and adjustment #11
- Dec 10, 2012
- Williamstown Ontario Canada
- Kubota M7040 Nuffield 465
I don't understand why they recommend max RPM?
All of my machines will develop max pressure (open the relief valve) at idle.
If a pump is worn enough, it won't open the PRV at idle.
Oil exiting via the relief causes a pressure increase due to the restriction the relief valve creates.
The use of max rpm's is taking that restriction into account so, should you set relief at low rpm's, you can experience higher pressures with the engine rpm's up as more oil is exiting through the relief valve