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Adding hydraulics to dump trailer
The cylinder and hoses haven't arrived yet but they're both supposed to be 1/2 NPT. I don't know if they have machined ends or not but will keep the teflon on the threads.
Good thought about drainage. The trailer bottom has individual boards so water should drain fairly easily now. When the sheet metal bottom goes in that might become an issue. What should I do to the trailer hydraulics to allow for that? The hoses will hook to the rear tractor ports using quick disconnects.
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Adding hydraulics to dump trailer
Unlike my GREEN tractor, my dump trailer hydraulics do not leak down. It will stay partially extended(up)for weeks at a time.
In this case, even parking on a very slight slope will keep it drained, especially if the metal does not go up the sidewalls.
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Adding hydraulics to dump trailer
Rankin: Now that you mention it I can have 12,000 lb. in raised up a few feet for weeks on my dump trailer and it doesn't leak down at all.
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Adding hydraulics to dump trailer
There are hyd cyls with valves to hold the load if the pressure is removed. If the cyls were installed by a factory that possibly/probably is the type of cyl you have. Of the cyls I have seen built this way the valve body shows up the outside of the cyl barrel. There may be another design with them internally but I would doubt it. It might be an OSHA or such regulation cyls on load lifting is to be of this type. There is the only use I have seen of them.
IF you buy the normal hyd cyl from a tractor supply business it does not have that valve.
Be warned, those valves can and do fail and what held last time may not this time. There have been many injuries and deaths from people trusting a hyd cyl to hold a load.
As to holding the bed up for water to drain, you might find just a block of wood between the body and the frame sufficient.
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Adding hydraulics to dump trailer
The block of wood is a good idea, especially on my trailer since the battery is buried under the bed with the hydraulics. If it fails, it would be hard to get the jumper cables on it.
You are also right about it being different than a tractor hydraulic system. After you power the bed up it lowers by releasing a solenoid valve and letting the oil drain back to the sump.
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Adding hydraulics to dump trailer
DRankin,
Your trailer has it own self contain hyd system if I read you last post correctly.
If correct, that is different then using the hyd on the tractor to power the cyl as when you disconnet the trailer from the tractor the system is open and will allow the hyd oil to flow, and the cyl drop. Ken is planning on connecting to his tractor to power the cyl and thus using the tractor's valve to hold the cyl which of course is not there when he disconnects.
If you are able to disconnect from remote hyd connection with a loaded cyl, normally you end up wet with hyd oil spraying and cyl coming down depending on the load on it as to speed.
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Adding hydraulics to dump trailer
KT: Are you sure about spraying oil from disconnects? $100 says they won't spray when using standard quick disconnects. The connection itself acts as a check valve preventing oil from leaving or entering the cylinder. Modern QD's are made so that they have already stopped fluid from flowing almost as soon as they are disconnected so that they can sometimes be considered "dripless" to meet EPA guidelines.
Gee let's see... what can I spend that $100 bucks on...(and don't EVEN mention new lace for the canopy, buddy 
EDIT DISCLAIMER: The QD's I describe are the dripless "flat face" type not the "Pioneer" that are prone to leaking and can spray oil if there is even residual pressure with tractor not on making pressure.
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Adding hydraulics to dump trailer
ew,
You are so much fun. Maybe you are correct and then you may be wet! I learned a long time ago to be safe and DRY so I cut off my engine and break the hyd pressure before I disconnect my remotes.
On my tractor the remotes are hard to disconnect or connect if the system does not have the pressure released. I have no doubt with a load on the hyd cylinder you might as well close your eyes and mouth for you will get sprayed as even a good SLICK NORTHERNER (wet with hyd oil) is not near as fast as pressurized oil is.
If you are able to do so on your beloved blue toy good for you. Let me know the day just a tiny bit of trash holds the valve open. So I can be ROF
Very serious, it is not my suggestion to never disconnect with a load on the hyd cyl. Failure in any part of that system can DROP a load with no warning and no way to raise it. Always use a mechanical lock or blocking before you (or any part of you) ever get under any load supported by a extend hyd or air cylinder. They can fail with NO notice. If earthwrks is correct and you have the pressure being held by a fitting on the end of hyd hose you have the fitting, hose and cyl each can fail. If the fitting is the pioneer type the ball just getting bumped can provide that release.
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Adding hydraulics to dump trailer
KT: A SLICK NORTHERNER----wow that sounds remotely close to Carpetbagger.
My New Holland as a toy, hmmm. I'll give you that, but I make my living with it. How many toys can you say that about? BTW my feelings are hurt. Well okay, if HAD feelings they'd be hurt.
Pioneer vs. Flat Face Connectors: Therein lies the quandry. Now that you mention it I have had oil spray from the pioneers on the toy. I don't like Pioneers because they do leak--my toy's leak connected or not---and they're not ven made by NH! I naturally assumed EVERYONE uses the flat faced connectors which are used on the equipment I use and seen on farm equipment. You might want to consider using them. The long barrel shape has the internal valve it which like I said prevents leakage. It is very easy to disconnect them too since the pressurized oil behind the internal valve helps push the other side out, and as it pushes it out there are a series of o-rings and a plunger of sorts that seal up everything.
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Adding hydraulics to dump trailer
The tractor hydraulics are all Pioneer connectors so that's what I'll be using. They don't drip much, maybe a drop on disconnect, although they do seem to always be covered with an oily dust coating. I always relieve pressure before disconnecting.
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