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hydraulic cylinder won't move

Y

york

Member
Location
Mechanicsville Va
I have a 400 case tractor that I have used on a log splitter. I hook the 4"x24 cylinder to the remotes. The cylinder sat unused for about 2 years. When I connected up the cylinder it wouldn't move I then connect the cylinder to 430 case, cy still wouldn't move. the cy was old and pitted on the outside and not worth rebuilding. I bought a new 4x24 Grizzle cy from Va tractor supply. Hooked it up the 400 and it wouldn't move, I then took the cy to a hydraulic shop, they tested the cy and they said it work as it should with 2100 psi. my 400 should put out about 1100 psi at 11 gpm. I then hooked it up to a 1120 compact case that should put out 2100 psi at 4.5 gpm still cy only moves about 1/2 in out. Both tractors hydraulics work great both have new hydraulic oil and filters. What am I missing here? I haven't put a gauge on the remotes, I haven't used the remotes on other cylinders yet. I hooked up the 430 today and it won't work either and that remote works a loader bucket. The 430 has 1400psi at 8.5 gpm. Its like the two pressures are working against each other. Help is appreciated!
 
It sounds like the cylinder is not full of oil. The hydraulic shop got it to work on their machine, check the oil level in your tractor hydraulics, crack a fitting on the return look for air or foam. easy things first
 
I'm going to agree that you have a bad coupler. Try moving it real slow and see if that works. When the spring gets weak high flow will close the ball. Or just try different couplers. Since it doesn't work on three tractors that should make it the hose ends.
 
Are you using the same hyd couplings. I had a spring deteriorate on one hose of our woodsplitter. Hadn't been used for a few yrs.
 
Try putting the hoses and fittings on another cylinder and see what happens. My first guess is also the quick couplers, but I suspect there is a small chance a hose has gone bad on the inside and has plugged things up.
 
It will be tomorrow before I can change out the connectors. This makes me feel a little stupid if it is a connector, but it makes since. This is why it didn't work the old cylinder. Tomorrow Guys
Thanks
 
My guess is the couplers.

Can you hear the pump load when you try to move the cylinder? See the hoses jump?

If the pump loads, and no hose jump, probably both couplers not opening.

If the hoses jump and no cylinder movement, one coupler is not opening, or whatever the cylinder is trying to move is frozen.
 
GOOD NEWS, changed the first coupler I thought would be the problem, no success. Second one was the problem. I am splitting wood now! Thanks to all of you for your help. I must say I feel a little stupid, but I'll get over it, at 75 I am allowed a few stupid minutes.
 
A couple of years ago I did a complete overhaul and installation of a front end loader, including all new hoses, cylinders, and 2 spool control valve. As part of the process I installed quick couplers on all four of the hydraulic lines between the tractor cab and loader so that it would be easy to dismount if/when I might ever need to. I spent the next several months, with the occasional help of numerous friends and visitors, most of whom do their own repair and fabrication work, some who actually are employed by repair/mechanic shops, trying to figure out why the loader operation was rediculously erratic. Because of the symptoms, we all tended to think that the problem was in the control valve. In the end it came down to the fact that two of the four quick couplers were faulty.
 
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