2018 GC1720 - Does your loader leak down while tractor is in use?

[GeneV]

Mine too. I accept that. Its a lot more weight and its got provisions for pinning it up. Loader, though... if ANYTHING on a hydraulic system should be stable and static, it'd be that. I would hope, anyway.

Are you close to a dealer? For peace of mind, worth it to get it checked out since it still under warranty.

 

[the old grind]

You're assuming that once the hydro lines leave the valve, there are no variables to influence the stroke speed of dual-mounted cylinders, (moot when they're mechanically linked by the bucket, assuming that's relevant here. ) but there are. Differences in the length of hydro lines to each cylinder, one having a tighter bend radius than the other, a slight blockage in one line from a bad crimp where it attaches to the fitting, all sorts of things have an effect. (As long as cyls are free to move independently)

And that's just the hydraulic lines, the cylinders themselves also have their own quirks which could have an effect on how fast they stroke with same volume/rate of fluid...seals wearing down at different rates, tighter/looser bearings and pistons, again all sorts of stuff. (such stuff, if extreme enough then could twist loader arms, so that's it :thumbsup: after all. )

All of this is why sophisticated fluid power systems employ metering.

Differences in line length and turns etc can affect flow rate, but not pressure, and pressure equalizes rapidly at >2k psi. This is a non-compressible fluid, not 100 psi shop air! Your hoses and tee fitting to curl cylinders may be very sophisticated, but none of my four two-cyl FEL buckets are any more than that. (btw, also fifth FEL sold with JD but not picked up)

 

[GeneV]

All of this is why sophisticated fluid power systems employ metering. Our tractors' hydro systems simply don't need to be spec'ed out to that level of sophistication.

Let's all strive to be good at reading comprehension.

 

[GeneV]

Differences in line length and turns etc can affect flow rate, but not pressure, and pressure equalizes rapidly at >2k psi. This is a non-compressible fluid, not 100 psi shop air! Your hoses and tee fitting to curl cylinders may be very sophisticated, but none of my four two-cyl FEL buckets are any more than that. (btw, also fifth FEL sold with JD but not picked up)

I don't mean to hijack a dude's thread with a chat about cylinders, but you're wrong. Pressure doesn't magically appear. Disconnect the line to one of your cylinders on the loader, whoops no pressure going to that cylinder. Partially obstruct or delay the flow to and/or from that same cylinder: slower working cylinder compared to it's partner.

Again, a normally functioning tractor has no issue with slight variance in speed between the 2 cylinders going to the loader bucket, but there's nearly always some variance. You just never notice it because "they're mechanically linked by the bucket" as you say.

 

[Nacademus]

Bucket was almost on the ground when I checked on it, today. It was at over 35 inches when I started to check into it. It also noticeably leaks down quicker while using the tractor for other tasks. At least quicker than it used to. I'm going to unhook my lines and see if it still drops.