Farming equipment kicks my butt more than forestry

[@mrbrokit]

The 2nd cylinder is filled with oil dead heading the 1st. All air needs to get bleed with both cylinders retracted. Usually there is a bypass valve between the ports on the first cylinder to equalize the 2 cylinders

[@kopitzke55]

Right side lifted one time. Left wouldn’t. Think it blew the seal again, and now the left side lifts and right it junk. I bled all air. Hose routing is correct double checked that all.

[@mrbrokit]

@@kopitzke55I would think the right cylinder should be a duplex cylinder, look them up there are some good videos how they work. Basically a port should open allowing oil to bypass to the 2nd cylinder only when the 1st is fully extended. When the 2nd cylinder is full with no air it will equalize with the first and always move in sync. It is very important that the displacement of the rod side of the first cylinder match the displacement of the 2nd cylinder. The same effect can be accomplished with a standard cylinder with a manual bypass valve. You can test for bypassing by removing the hose to the 2nd cylinder and feeding oil to the top of the first.

[@mikemadsen7653]

might need a flow restrictor in one of your hoses

[@42anon427]

Something seems weird about that hose routing....the way the bottom of one cylinder feeds the top of the other? Once the left side lifts, there's no place for the fluid in the "bottom" side of the right cylinder to go...so yeah, it wouldn't move, and yeah, it seems like the fluid would be getting forced past the seal in the right cylinder (but not necessarily because of a failure). I'm not an expert, but it seems like those cylinders need to be in parallel if they are meant to lift together...whereas now they are in series. Long story short....something seems goofy with the hose routing. I could be wrong though. Edit: I compared to some others on Google images, and the hose routing seems the same. So, I dunno? Maybe it is an air bleed issue, and it just needs to be cycled a bunch of times? I don't quite understand what the oil path is from the inlet on the right side...somehow past the seal, to the right outlet(bottom)....which is then connected to the inlet on the left cylinder?

[@kopitzke55]

We’re pretty positive it blew the packings out on the new cylinder… Or someone cleaned there old one up and a parts man took it back as a “new” cylinder and ended up coming to us. Either way pretty upset.

[@42anon427]

@@kopitzke55 It does seem to point to that cylinder. I can see how fluid gets to the top of the right cylinder...but I'm confused how it ends up between bottom right, and top left. It seems like there'd have to be a way to bleed that system....or for fluid to pass the seal initially, to fill up that side. I mean, I understand how compressing the bottom right will apply pressure to the the top left...but how does that side get filled up initially? I'm probably mentally missing something, like some sort of internal check valve...or something.

[@mrbrokit]

@@42anon427 it can be done with a duplex cylinder, basically a valve opens allowing bypass only when the cylinder is fully extended.

[@AW-gi3qf]

Yeah idk wtf is going on there