I am trying to decide if I get a true 3rd function or a diverter valve. I think if I could get a electro-hydraulic proportional 3rd function I would probably just go that way, but I haven't seen much talk about it, and I don't really know of any options. My uses for the 3rd function will be the angle for my plow and a grapple eventually. I am thinking that it would nice to have the capability to feather the grapple, so I am sort of leaning toward the diverter valve. I think the downside is that I couldn't use two functions at once. So I have a couple questions to help me decide.
Anyone have experience with a true 3rd function on a 2038R, and are you able to curl the bucket and close the grapple at the same time?
The second question is more about how the hydraulics of the tractor work. I am worried that with a diverter I wouldn't have any pressure relief, and with the plow at full angle it seems that it would be easy to hit something and over-pressure that system and cause damage to the cylinders/lines/diverter valve. I know a crossover relief valve would help in this situation, but it got me thinking about the rest of the loader hydraulics and I realized I don't really understand how the pressure relief valve works. I know when you have the loader valve activated and you are pushing against something that takes more pressure than the system allows the PRV kicks in and I am assuming lets fluid 'bypass' to somewhere.
My question is if the loader valve is not activated and something over-pressures the system, does the PRV still work? Or does it only work with the loader valve is activated (in use)?
Hopefully that makes some sense. Any input is appreciated.