Identify Hydraulic Fitting Type

[Chilliwack Murray]

I’ve spent a lot of time googling and searching this and other forums trying to identify this type of fitting.

I have several of these that are leaking on a Kobelco mini excavator which was loaned to me in exchange for some repairs.

These are pilot line fittings and they are loose feeling and swivel with no resistance even when tight. Without a drawing of the fitting I can’t wrap my mind around how they seal and I’m hesitant to pull one apart until I have the parts to repair it. These didn’t exist when I went to trade school. Any help is appreciated, I’m sure the collective here has the knowledge.

 

[KWentling]

I believe those are WEO plug in connectors. I have no personal experience with them. Google them for information.

 

[/pine]

I've seen o-ring face seal (ORFS) hose ends that look very similar...They are common on industrial machines...

 

[Chilliwack Murray]

They are similar but these are definitely not push in, they are screwdown fittings though they swivel with no resistance even under pressure. I think the E clip on the nut may be a clue to the type.

 

[KWentling]

Pull the E-clip and see if they push in. If it does then pull it out. Sure looks like WEO style to me.

 

[BeezFun]

I was curious, never heard of WEO. Went and looked at WEO design and installation instructions. The stop clip looks different on yours, but as the instructions below indicate if you pull the clip out and push the fitting in, it should then be released to come out. It's designed to rotate freely even under full pressure.

 

[Chilliwack Murray]

I will try that as soon as I get a chance. I think it is likely this type of fitting though all the examples I could find had the plastic style clip so maybe just a knockoff being from china. What I thought was the nut on the fitting is probably the adapter in the component port.

 

[Texasmark]

McMaster Carr is a good place to search. They have a tutorial that goes with the different connectors.

 

[npalen]

WEO 350 standard plug-in fittings | CEJN (US)

Hydraulic push-to-connect fittings

www.cejn.com

Video on WEO type fittings.

 

[Chilliwack Murray]

I got called away for work so can’t check for a few more days but that certainly looks like the same principle, maybe a different brand accounting for the plastic clip instead of the metal e clip.

 

[Chilliwack Murray]

Sorry for the delayed response... As often happens, one unplanned trip for work led to another and another after that.

Anyway, I pulled the E-clip and still couldn't release the fitting so I spun the hex fitting out and now it's obvious. The fitting seals with an o-ring in the bore of the hex section and with the E-clip removed you can slide the tube forward to expose the o-ring. New o-rings and the leaks are gone.

Thanks everyone for their input - one thing I learned along the way is these seem to be commonly used on New Holland equipment. I know I've seen these fittings used for fuel lines on industrial equipment over the years but I don't recall the brand.


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