what would you do? I have a hydraulic cylinder that is driving me nuts. It retains so much back pressure in it that /i cannot hook the hoses up to the tractors outlets. most if not all other cylinders I can press the hose tips against something solid and "bleed" or release some fluid which will allow me to hook up the cylinder hoses to the tractor. This cylinder will not cooperate and I cant get the tips to bleed fluid out no matter how much I bang them against a drawbar or what not. I have resorted to unscrewing the hose fitting at the cylinder to bleed off some pressure. Any suggestion? Is there a bleeder valve I need to install or even something simpler?
- Thread starter SHALER
- Start date
wrenchere85
Member
Go to bolingmachine.com They have a hydraulic unlock tool that works great. They have one for the Pioneer fittings and one for Skid Loader type fittings. I bought both. One of the best things that I ever bought, they work great. They don't damage the fittings or make a mess.
Dopp Creek
Member
X2. Shut off the tractor and cycle the valve a couple times before disconnecting.
Russ from MN
Well-known Member
- Location
- Bemidji MN
I have had that happen with the 3-point wood splitter that I built, I just loosen one hose at the cylinder and it hooks right up. It's only happened twice in 11 years, I can live with that!
Brendon-KS
Well-known Member
- Location
- Goessel, KS
Not all Stucchi couplers are connect-under-pressure, only certain styles, so a person needs to know exactly what to ask for. Also, other companies offer these as well - they aren't exclusive to Stucchi.
MARK ROBKE
Well-known Member
I always unhook my hoses with the control lever in float position, and the cylinder is at 'rest' . Mark.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
If disconnected cylinder/hoses are exposed to direct sunlight pressure inside cylinder/hoses can increase after being disconnected from tractor due to heating process of the sun.
used red MN
Well-known Member
- Location
- Coon Rapids, MN
Not knowing the situation that this happens in I would say Jim TX has what is likely causing your issue. If the cylinder is unhooked when it is cooler then you are trying to reconnect it at a higher temperature particularly in the direct sun light the pressure due to fluid expansion in the cylinder can get really high. I don’t know what the hose set up looks like you are using but I feel an option is to install a swivel fitting similar to the one in the link. This type of fitting can be loosened to bleed off pressure much easier than a normal tapered pipe thread. If your hoses are pipe thread the internal end of the threaded male fitting normally has a flare that seals to the swivel type fitting. This type of fitting should be available in the size you need at any good hydraulic shop or equipment dealer. There may be a bleed you could add but I don’t have any experience with a suggestion for that.
Example swivel fitting
Example swivel fitting
Too many unknowns . If tractor is equipped with check valves you cannot release pressure when engine is shut down. Lot of tractors after about 1985 have check valves incorporated right in the valve. Older tractors usually had remote check valves. Newer yet often have electric controlled valves that require electric and hydraulic to relieve pressure so engine has to be running.
And like said, sitting in the sun will build a lot of pressure. If only happening on one particular cylinder regardless of machine it is hooked to, I would check for leaking cylinder by unhooking hose not holding up load and check if that tip develops pressure. Should be able to open that tip easily with no oil escaping.
And like said, sitting in the sun will build a lot of pressure. If only happening on one particular cylinder regardless of machine it is hooked to, I would check for leaking cylinder by unhooking hose not holding up load and check if that tip develops pressure. Should be able to open that tip easily with no oil escaping.
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