I just inherited this tractor from my grandfather and it came to me with the top lid off and was told that the hydraulics haven’t worked at all. I went ahead and replaced the o-rings within the top lid while it’s out and replaced the piston and seals, but unsure after looking at this back-pressure valve. Everywhere I’ve see the inside of the valve hasn’t sat so far out to where you can’t screw it in or out or anything, along with the line running from it is crushed in. I just need to know if this valve is okay and if the line being crushed is too big of a deal? Along with if it’s not okay to use, where do I go to get parts as everywhere I look I can’t find much parts for the back pressure valve?