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hydraulic quick connects

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spikedog
Join Date: Jul 2010
Posts: 7 frostburg, maryland
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2010-08-21          173335

i'm gathering hyd. supplies to plumb my fel mounted pa plow just wondering what type of connectors to use i see the are several from relativly cheap to expensive, any help would be appreciated . thanks mick
sorry i mean quick connect fittings i didnt specify


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earthwrks
Join Date: Dec 2003
Posts: 3853 Home Office in Flat Rock, Michigan
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2010-08-21          173340

The choice is yours, well, and your checkbook's.

The John Deere-types which are found on tractors mostly leak terribly. I've heard they're actually illegal in certain situations like construction sites because they leak and contaminate the ground.

Flat face connectors are suppose to be used to prevent leaks, but hey do just not as much.

The cost reflects the size of the connector which correlates to the type of fitting of hydrualic line it's made for, and the volume it's rated to carry. For your purpose, I'd go with the smallest connector both for size and to reduce greatly the fluid volume---you don't want the plow rotating fast because you will break something. I have a similar 8' plow from a truck on my skid steer and it slams hard if I don't feather the controls. ....

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spikedog
Join Date: Jul 2010
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2010-08-23          173394

i was planning on running 3/8 lines would i be better off with 1/4 to reduce the flow rate ? thanks for info, mick ....

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earthwrks
Join Date: Dec 2003
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2010-08-23          173396

Even 1/4" may be too big depending on your pump's GPM. Consider installing a manually adjustable metering valve on one line and see what happens. ....

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kthompson
Join Date: Oct 2005
Posts: 5275 South Carolina
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2010-08-23          173397

I don't know the name but the fittings some use can be simply pushed in and pulled out while others of the same "look" require two hands to operate with you pulling the outside sleeve on the female fitting to release the male fitting. I despise those. Here they are normally referred to as Pioneer fittings but think it is just the most popular brand. You also have to have the pressure broke or near zero for either of these. So that means cut off pump and work levers. ....

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hardwood
Join Date: Dec 2002
Posts: 3583 iowa
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2010-08-24          173404

EW;
You have me wondering about the "John Deere Type" couplers that leak terribly.
Thinking back thru my farming days I just don't remember those couplers leaking more than a few drops when they were coupled or uncoupled. The "O" ring inside the female half would on a rare occasion get damaged or get dirt under it causing a leak, you can replace the "O" ring in a minute or two and it's good as new again.
The male half of the coupler with the ridge that fits in the "O" ring in the female half when coupled can get rusty and pitted from being left out in the weather for a long time, there is no fix to that but they can be replaced easily and at a low cost.
Leaks at threaded connections in a system were far more common in my experience.
Splain yer self a bit son.
Frank. ....

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hardwood
Join Date: Dec 2002
Posts: 3583 iowa
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2010-08-24          173405

KT;
I can't give you a brand name of those either but some tractors had them for the rear couplers to a towed implement.
The ones I remember were held by a bracket that fit around the sleve you mention and were a one hand operation.
They were common when the moldboard plows still had a trip hitch that unhooked when you hit a rock then the hoses to the lift cylinder could yank free from the couplers without tearing the hoses in half before you got the tractor stopped to back up and re hitch.
Pioneer got to be sort of a generic term for couplers, I can't off hand name other makers of couplers but there were many.
Frank. ....

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earthwrks
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2010-08-24          173424

Maybe Pioneer instead of JD? I don't like 'em whatever they're called. I prefer the flat-faced ones. ....

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Murf
Join Date: Dec 1999
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2010-08-24          173427

My understanding was that the JD style was a Pioneer fitting. It just had a slightly different shape to it.

There are several different types of fittings even within the Pioneer style.

The key however to minimizing leakage with any of them is to ensure that both sides of the circuit are not pressurized before coupling or uncoupling the lines.

Kenny, I think what you're thinking of is the 'safety' style of coupler in which the outer ring can either be pushed or pulled to release the connection. If they are mounted in a collar by that ring they disconnect merely by pulling on the lines.

Best of luck. ....

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kthompson
Join Date: Oct 2005
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2010-08-25          173431

Frank, Murf, the fittings that came on my M6800 Cubit are mounted on steel tubing with the outside of the quick disconnect not mounted. You push the hose in to inserted and give it a tug and it will pull out, as long as no pressure on it. Did not know how much I liked that until one was damaged and replaced it with much lower price Pioneer Brand which requires the outside sleeved pulled toward you to insert or remove the male end. Last I checked the Cubit fitting was about $70 or $80 each for the female fitting. Might make a good Christmas gift from the tractor. :) ....

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hardwood
Join Date: Dec 2002
Posts: 3583 iowa
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2010-08-25          173448

KT;
Just a bit of my memory of hydraulic quick couplers.
My first memeory is from the "H" and "M" Farmall days, they had no couplers at all. Three half inch pipe nipples came out of the sides of the tractor behind the flywheel housing from the old "Belly Pump" they had two on one side one on the other side. Most everyone put a 90 degree elbow on the ends of the nipples then to couple a cylinder you screwed a half inch pipe plug out of the elbow then screwed the swivel end of the hose going to the one way cylinder into the elbow. That was as close to a quick coupler as we had then. Pretty soon the Pioneer type came along to lessen that chore.
When the Super series, M's, and H's came along with two way hydraulics up thru the end of the 4 cylinder tractors IHC used a sort of flat faced coupler mildly similar to the Bobcat flat face ones they use now. They had a large nut that you could screw the two ends together with that fastened the hoses firmly to the tractor, if something behind came unhitched it tore things all to pieces. Then they came up with a bracket system that held the couplers together without the big nut so that a trip hitch plow could come unhitched without ripping the hoses in half before you got the tractor stopped. Those flatface bracket held couplers were a fizzle, they leaked bad when new. I still have some of them left from when we replaced the flat face with Pioneer type ones. From then on IHC was pretty much Pioneer type, some bigger for higher flow etc.
The absolute best couplers ever made to this day in my mind came on the 4010 and 4020 series John Deere row crop farm tractors. Built up hose pressure meant nothing, you pushed the male half into the back of the tractor, pulled down on a little lever, that released the hose pressure and you were coupled up, no leaks, no mess, no problem. I have a hard time understanding why they couldn't have just made them bigger for modern higher flow systems and still had a simple coupler system the still has any coupler beat that I've ever been around.
Frank. ....

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