Hydraulic Coupler Rebuild or O-Ring Size

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Reference:

Hydraulic Coupler HNV38NP

Kubota PN: 7J417-66320


Two couplers have developed a leak after putting the FEL back on after sitting for the winter while the front snowblower was on. I believe the o-ring visible inside the coupler is the root cause. Does anyone know the o-ring size or if a rebuild kit is available?

Discussed repairing with local Kubota dealer and they have no further parts breakdown on the coupler since Kubota doesn't provide the info or a kit for it. They simply replace the whole coupler. They did mention that New Holland offers kits for the ones they sell, but didn't try to see if they use the same fitting.

So I'm hoping someone on the forum can direct me to the o-ring size or kit part number.

Here's the link to Messick's showing the part: Kubota: COUPLER, HNV38NP, Part # 7J417-6632

Thanks in advance for you help.

 

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For those that might be interested the coupler is made by Faster, part number HNV38NP. ISO 7241 part B interchange.
Faster | HNV | Standard couplings for industrial applications, ISO 7241-B interchange


The o-ring on the inside and visible when the female connector is uncoupled is #018. It's also important to not that no backup rings are used in this design. For reference, some other manufactures use back-up rings in their design.

It's easy to get the o-ring out with the right picks, and replacement is very straight forward.

The coupler is used on 51 models, so it is fairly popular. Mostly Front End Loaders and Backhoes.

Hopefully someone will find this info helpful.