Threepoint
Veteran Member
- Joined
- Feb 13, 2014
- Messages
- 2,233
- Location
- No. VA
- Tractor
- Kubota B2150HST w/ LA350 loader, Kubota GF1800 HST, Kioti CK3510SE HST w/ KL4030 loader, Kioti NX4510HST/cab w/ KL6010 loader
This is the most unusual reason for having the check valves I have heard. I can't relate to the idea that the top link adjustment should remain fixed, in that case why have a hydraulic top link? I do a lot of grading work and use the top and side link adjustment all the time to get the right results. At least for me their is no fixed position, I can glance at the rod length showing and know if it is right for what I am doing, it becomes intuitive.
Sure, there's no "fixed position" for me, either, but the benefit of the hydraulic top link should be that it can make pitch changes when the operator wants them, not when he doesn't. My NX4510 is a few months old, so slow leak-down in the hydraulic system shouldn't be an issue for a long time. But it is on a lot of older tractors, as on my 21 y/o B2150. So in my view a check valve is worth having on a hydraulic top link, especially where the remote hydraulic valves do not have float function, as many don't. The safety issue is another reason, but as I said, I don't consider it that important in my particular case.