Coupler styles--why are there 2?

[Johnbro]

My new 4240 has manual quick couplings on the loader (like the ones here: Agricultural Quick Couplings - SafeWay Hydraulics - and push-to-connect couplings on the TnT (can't find a picture for sure).

The "manual" style has a collar that must be slid back to connect or disconnect. The "push to connect" style you just theoretically push in and yank and they disconnect. Usually it takes a couple of yanks.

My dealer was SUPPOSED to put the manual style on the TnT but it didn't get done before delivery (they're great and will make the change over at the 50 hr service).

My questions are:

1. Why are there two styles? What's the pros and cons of each, if any?
2. Is it just me, or does anyone else think the push to connect is a big PITA?
3. Should I leave it alone or switch everything to the manual style as originally planned?

 

[SPYDERLK]

The push to connect are good for tractor to towed equipment connections. If something bad happens in use -- or if you forget to disconnect them when taking off the implement they will pull out instead of trying to drag the implement by its hoses.
Good byline. Common use seems to indicate that its easy to loose one thats to/too lose. :confused3:
larry

 

[MtnViewRanch]

I have the push-pull QDs on two of my tractors. One tractor has them mounted very firm, no give what so ever, they work great on this tractor. :thumbsup: On another tractor it is mounted in a manor that is not so rigid, that QD is sort of a pain. :thumbdown: I'm wondering if your QD mounting situation is part of the problem. :confused3:

 

[Willl]

There are 2 (and more) because they try to improve on an already working setup.

They express their improvement as something simpler to use. Is it ?

 

[dex3361]

I have them on my grapple and I love the push / pull connecting with one hand.

 

[Johnbro]

I have the push-pull QDs on two of my tractors. One tractor has them mounted very firm, no give what so ever, they work great on this tractor. :thumbsup: On another tractor it is mounted in a manor that is not so rigid, that QD is sort of a pain. :thumbdown: I'm wondering if your QD mounting situation is part of the problem. :confused3:

Bullseye! Both on my TnT and my buddy's 5240 TnT the Kubota factory mounting bracket for the rear remotes is kind of floppy. When you push in on the coupling the mounting flexes a bit. Maybe that's the problem.

 

[Discount Hydraulic Hose]

The "push to connect" style you just theoretically push in and yank and they disconnect. Usually it takes a couple of yanks.

Umm, no. "Push to connect" fittings are just what they sound like. The connect when you push them together. However, you still need to pull the ring back in order to disconnect them. In fact, most of these have a notch on the ring, forcing you to rotate it to the correct position before disconnecting. This prevents accidental release.

This style is also know as "flat face" or "flushface" couplers. They are very popular on skidsteer loaders and other applications.

Besides being easy to connect, flat face couplers are designed to connect and disconnect without dripping. This is important in environments where hydraulic fluid dripping on the ground/floor could result in messy cleanup or worse, fines from the EPA.

They are also designed for higher working pressures and higher flow rates. 1/2 ISO 16028 flat face couplers allow a flow of 17 gpm, while ISO 5675 Agricultural Couplers of the same size only allow 12 gpm.

Both styles of couplers can be seen here.

ISO 16028 Flushface Hydraulic Quick Couplers
aka "Skidsteer Couplers"

ISO 5675 Agricultural Hydraulic Quick Couplers
aka "Pioneer Couplers" because they were popularized the Pioneer Co. before that company was absorbed by Parker-Hannifin.

Besides these two styles, there are several others commonly used in hydraulic applications, including screw-together and wing-nut styles. It would probably be confusing to go over all of them here. The two discussed above are the most commonly found on tractors and other agricultural equipment.

 

[Jay4200]

The "manual" style has a collar that must be slid back to connect or disconnect. The "push to connect" style you just theoretically push in and yank and they disconnect. Usually it takes a couple of yanks.

I have push/pull QCs for my backhoe connections - and I HAVE forgotten to unplug the QCs and driven away from my backhoe a couple of times. Push/pull QCs are brilliant - would've surely ripped the the hoses out otherwize. I don't know why the single-direction QC collars exist, except perhaps for reduced cost.

JayC

 

[rjkobbeman]

Umm, no. "Push to connect" fittings are just what they sound like. The connect when you push them together. However, you still need to pull the ring back in order to disconnect them. In fact, most of these have a notch on the ring, forcing you to rotate it to the correct position before disconnecting. This prevents accidental release.

I believe the "push to connect" reference was to the Agri standard coupler... which is a push to connect and pull to disconnect. No collar or ring to release. You just pull on the hose or fitting.

 

[Leejohn]

I think it's the holder they are mounted in, because you can buy a set of holders to make the ag. couplers pull to disconnect.

 

[Discount Hydraulic Hose]

I believe the "push to connect" reference was to the Agri standard coupler... which is a push to connect and pull to disconnect. No collar or ring to release. You just pull on the hose or fitting.

Can you tell me more about these? The standard Agricultural couplers I'm familiar with are the ISO 5675 couplers I linked to in my previous comment. Parker/Pioneer "4000 Series" are the best known examples of ISO 56875 couplers.

I am also aware that some manufacturers offer a mounting bracket which allows for easier (one hand?) connection and disconnection, but I am not very familiar with the operation of said brackets.

 

[rjkobbeman]

Can you tell me more about these? The standard Agricultural couplers I'm familiar with are the ISO 5675 couplers I linked to in my previous comment. Parker/Pioneer "4000 Series" are the best known examples of ISO 56875 couplers.

I am also aware that some manufacturers offer a mounting bracket which allows for easier (one hand?) connection and disconnection, but I am not very familiar with the operation of said brackets.

I see the confusion now. I went here to refresh my memory on the different standards: ISO 5675 Agricultural Hydraulic Quick Disconnects

I never paid much attention to it until now, but it looks like the "standard" is the mating of the male and female couplers... not necesary the operation. In other words, my Kubota has this standard (I buy the 8010-4 male -- which is the male pictured at the very top of the page) however the female coupler does not have a locking ring that must be pushed back to release. Mine you just push to connect and pull to disconnect.

I can take a picture tonight and post it.

 

[J_J]

I see the confusion now. I went here to refresh my memory on the different standards: ISO 5675 Agricultural Hydraulic Quick Disconnects

I never paid much attention to it until now, but it looks like the "standard" is the mating of the male and female couplers... not necesary the operation. In other words, my Kubota has this standard (I buy the 8010-4 male -- which is the male pictured at the very top of the page) however the female coupler does not have a locking ring that must be pushed back to release. Mine you just push to connect and pull to disconnect.

I can take a picture tonight and post it.

Do you happen to have the break-away kit? That kits for the Pioneer couplers will allow you to insert the couplers, and pull away, with out you touching the sleeves. The bracket does all the work. Should you drive off with the hoses still attached, the bracket will pull the sleeves and release the hoses.

There is also the lever release couplers.

Some of the couplers also will allow one to either push or pull the sleeve.

On some of my couplers, you have to turn the sleeve and pull.

Pioneer Hydraulic Coupler Break - Away Clamp (1/2") at Blain's Farm & Fleet

 

[Leejohn]

I see you guys found the break away bracket. They have been around a long time.

 

[rjkobbeman]

Do you happen to have the break-away kit? That kits for the Pioneer couplers will allow you to insert the couplers, and pull away, with out you touching the sleeves. The bracket does all the work. Should you drive off with the hoses still attached, the bracket will pull the sleeves and release the hoses.

There is also the lever release couplers.

Some of the couplers also will allow one to either push or pull the sleeve.

On some of my couplers, you have to turn the sleeve and pull.

Pioneer Hydraulic Coupler Break - Away Clamp (1/2") at Blain's Farm & Fleet

No break-away kit. My point was MY couplers do not have sleeves. You simply pull on the hose and they disconnect. (Actually, I prefer to pull on the male end so I am not pulling on the hose, however I said 'hose' to illustrate there is no sleeve to mess with.) Here is a pic of my rear remotes:

 

[MtnViewRanch]

Here is a pic of mine, no collars either. The fittings are fastened directly to the valves, there is no bracket what so ever. You need to zoom in to get a better look.

 

[J_J]

Are you saying that to unplug, you pull the male coupling out. What keeps it locked in place? Is there a sleeve under the rubber part, or a release mechanism? What brand are they?

Do you have to push in first and then pull?

 

[MtnViewRanch]

Are you saying that to unplug, you pull the male coupling out. What keeps it locked in place? Is there a sleeve under the rubber part, or a release mechanism? What brand are they?

Do you have to push in first and then pull?

Mine are what come OEM for Mahindra QDs. I have to push first and then pull to disconnect mine. However mine work, it is all internal.

 

[rjkobbeman]

Are you saying that to unplug, you pull the male coupling out. What keeps it locked in place? Is there a sleeve under the rubber part, or a release mechanism? What brand are they?

Do you have to push in first and then pull?

Yup, just pull on the male coupler. No push-first... just pull. It was new to me when I bought my tractor. I stared at it for an hour before I got on the net an did a search. Apparently they are fairly common. No sleeve under the rubber. That rubber you see is only the protective cover. I can pull that rubber off and there is only a groove where the rubber seats.

Mine say Parker on them. I can get the part number if you want. They accept the ag standard (ISO 5675 male couplers).

They snap into place, but they must lock somehow when fluid flows. When under operation, you can't pull them out.... however there is not a "pressure buildup issue" like the skid-steer couplers. (I guess there could be that issue since they lock under pressure, but my HTL has never caused that problem.)

There is a set of balls that snap into the detent of the male coupler. I think something internally locks the balls when fluid is flowing. I'm envisioning some sort of internal, fluid flow activated, collar/ring.

I do have a set of standard skid-steer couplers on my FEL remotes. Those of course have a collar.

 

[Discount Hydraulic Hose]

Yup, just pull on the male coupler. No push-first... just pull. It was new to me when I bought my tractor. I stared at it for an hour before I got on the net an did a search. Apparently they are fairly common. No sleeve under the rubber. That rubber you see is only the protective cover. I can pull that rubber off and there is only a groove where the rubber seats.

Mine say Parker on them. I can get the part number if you want. They accept the ag standard (ISO 5675 male couplers).

If you have a part number for these, I would be curious to see it. I've been looking through my Parker catalog, and on their web site, and I can't find anything like these.