3rd function, pressure can't connect

[john745]

I have a third function installed on my Kioti 3510 using the flat-faced skid steer connectors.

I can never get it connected without completely unscrewing all of the connectors and releasing pressure on both the tractor side and the attachment side.

I never have this problem with my rear remotes (pioneer connectors).

I always release the pressure on the tractor side of the hydraulics...

What am I doing wrong?

 

[RjCorazza]

I don't use flat faced connectors, but I occasionally have to release pressure on my 3rd function lines like this :
Turn the tractor off
Turn the key to run
Power the solenoid, and operate the 3rd function
Make connections.

 

[CH4Ohio]

Do you keep the pressure off your implement before you disconnect? What I mean is, do you drop the grapple (or whatever) with the cylinder in the middle of its stroke --- or at the extreme open or closed position?

If I drop mine with the cylinder NOT at the end of its stroke, then my hoses aren't flexed with pressure and I don't have one side of the system pressurized to the max. Lets you hook up without needing to relieve pressure on whichever side is fighting you. You don't have the cylinder and hoses "locked" to one side or the other and neither hose is at the full pressure of your hydraulic system.

I've never had to break any fittings on the TRACTOR side to get an implement hooked up. Something doesn't seem right there . . .

 

[D&D]

IMO, keeping the attachments hoses looped together works best. Helps to keep dirt out too. Weather changes don't seem to build pressure in the loop regardless of cylinder position.

 

[workinonit]

I agree with this. Temperature changes is what is causing the pressure. The tractor side is easy to equalize.

 

[nyone]

When disconnecting if you park your attachment, turn machine off then cycle the valves it would put the attachment your disconnecting in a good position to re hook at a later time.

Flat face connections are a total pain in the ass though. Granted my AG connectors are prety far away from where any dirt would easily get to them.

 

[5030]

I HAD flat faced on my skid loader. Changed them to Pioneer soon as I bought the machine. Flat face I agree are a PITA. Mine went in the scrap can.

 

[grsthegreat]

Flat face allow more flow, thats why they are used. But they are a PITA to connect. Thats why i use the attachment tool for past few years.

QC Mate Hydraulic Coupler Clamp | Branch Manager Attachments

The QC Mate Hydraulic Coupler Clamp solves the common pressure build-up issue that most quick-connect hydraulic couplers have.

www.branchmanagerusa.com

 

[Xfaxman]

More info: Front-End Loader - Flat Face Hydraulic QC

 

[drumminj]

Flat face allow more flow, thats why they are used. But they are a PITA to connect. Thats why i use the attachment tool for past few years.

QC Mate Hydraulic Coupler Clamp | Branch Manager Attachments

The QC Mate Hydraulic Coupler Clamp solves the common pressure build-up issue that most quick-connect hydraulic couplers have.

www.branchmanagerusa.com

I have one of these as well to help with my flat-face connectors for my third function. I need it maybe 1/3 times I'm connecting the grapple.

 

[john745]

Super fantastic. I appreciate ALL of the responses. Thank you very much. I need to start connecting my connections so that temperature fluctuations don't cause a problem and I also need to consider switching back to pioneer.

 

[D&D]

If you have money to blow one of these may help fix that problem.

DP PLATE SERIES

The DP Series of Multi-Coupling Plates allows the simultaneous couple and uncouple of two to four hydraulic and/or electrical lines with a single, simple movement requiring very little force. The circuit lines can all have the same coupler nominal diameter and different media. A dust cap is...

www.stucchiusa.com

XBoom Excavator Coupler System (Excavator Skid Steer Loader Adapter Coupler System)

16028 / Skid Steer / Flat Face Relief Tools

The Original Tractor Relief Tool for Skid Steers, Mini Excavators and Flat Face Couplers! Our Patent Pending Design!! The only way to release pressure in Female ISO 16028 Flat Face Couplers! An industry first!! Female and Male tools sold together or can be purchased separately.

www.tractorrelieftool.com

 

[bdhsfz6]

The first thing I did on my new tractor was to swap the flat face couplers with Pioneer.

I made this tool from a $12 welding clamp, which makes it a snap to connect & disconnect the fittings:

https://www.harborfreight.com/9-in-locking-welding-clamp-56629.html?utm_source=google&utm_medium=cpc&utm_campaign=21905699479&campaignid=21905699479&utm_content=171677810862&adsetid=171677810862&product=56629&store=343&gad_source=1&gbraid=0AAAAADAHb4dfBvdr4cGyTORmElMAmcx4_&gclid=Cj0KCQjwtpLABhC7ARIsALBOCVqx5fT_RKJMldxZrMrVascRPul8bSckpUZ1kQuvkdcfYRjfwimgN30aApsgEALw_wcB

The only mod necessary was to grind the clamp opening to fit the notch in the connector barrel:

 

[dstig1]

I didn't know the bar clamp tool existed so I made my own. It would be easier on a bar clamp as the free end of the clamp would not tend to want to rotate as you are trying to place it, but it works

I added a couple extra tabs to keep it from racking in use.

 

[BackRoad]

I made mine with a clamp, couple of bolts, 2 left-over sections of Uni-Strut....and 10 minutes of grinder work.

 

[sdef]

I had the same problem with my grapple. As others have mentioned, it is due to pressure buildup in the lines due to temperature changes. I built this simple apparatus to attach to the grapple ends of the connectors while in storage. Each side is simply the two plastic pieces viewed, available from any big box store, mated together to mount the skid steer connectors to keep dirt out, with a tiny hole drilled into the body to allow pressure relief of any buildup over time.

The last step of disconnecting the grapple from the tractor is to attach the modified connectors to the grapple lines. Works well.

 

[Robfnk]

I have a third function installed on my Kioti 3510 using the flat-faced skid steer connectors.

I can never get it connected without completely unscrewing all of the connectors and releasing pressure on both the tractor side and the attachment side.

I never have this problem with my rear remotes (pioneer connectors).

I always release the pressure on the tractor side of the hydraulics...

What am I doing wrong?

I had the same issue. found an article that said to cover the flat surface with a rag the tap it with a hammer. It releases the pressure and they go together nice. I was gun shy at first about hitting it with a hammer but was tired of fitting it every time. works great for me.

 

[jmc]

My theory is fluid is trapped between the coupler and the control valve so when the mating side of the coupler tries to displace that fluid, there's no place for the fluid to go. What works well for me is to somehow* hold the control valve open while connecting the attachment.

Also, Discount Hydraulics has self relieving flatfaced couplers that have worked for me most of the time.

*Either a wife or a C-clamp.

 

[DieselBound]

I've found that on my grapple that if I pry the jaws open that that helps reduce pressure in one of the lines: always just one line is bearing pressure. I don't have my tractor-side hoses fixed and that's the same on the grapple side which makes it quite the pain to connect having to hold the ends on both in order to push them together. I don't use the 3rd function all that much so I just kind of tolerate it (don't switch to the Pioneers).

 

[masscity]

My Kubota has pioneer connectors and depending on the temperature they won't connect.

I take a small screwdriver that I don't need, cut the shaft off and save the small handle. Then I use a rag (so it doesn't squirt) and a small hammer and tap either the male or female gently with the plastic end of the handle on the connector and it fixes it.