Flat Face Hydraulic Connector Help

[EPIC]

I am having a problem finding the correct flat face hydraulic connector to fit on my Kubota KX040-5.

I thought it was a #10 ORB, but even though it is very close in size it won’t thread.

According to local hydraulic shop it is a #8 British thread. This does thread but I am concerned that it might not seal since it doesn’t have a O-Ring at the base and instead relies on a bevel to seal that the coupling doesn’t seem to have.

The attachment is a hydraulic post hole digger, and the max flow is a little over 17 GPM. It has a Holmbury HQ12 coupler.

Can anyone please provide help on what fittings I need please?

 

[MOOTS]

Do away with the adapter and thread in directly to the orange pipe on machine.

 

[#40Fan]

Do away with the adapter and thread in directly to the orange pipe on machine.

That should be a lot easier.

 

[Russell King]

There are TWO different types of “British threads”.

There was/is BSPP (parallel threads) and BSPT (tapered threads). This site describes the difference in thread types. To make it a bit more confusing they are now identified by DIN standard (G is BSPP). And used in the metric world but use inch sized threads!

NPT, BSPP, BSPT Threads Explained (With a Quick Identification Checklist)

NPT vs BSPP vs BSPT: learn taper, angle, pitch, and sealing methods to ID threads fast and stop leaks with proper adapters before installation.

www.industrialpartsfittings.com

You probably have BSPP threads on the tractor. The loader may have been built in Japan or in the USA so I won’t venture a guess what was used but if it is British it is probably the BSPP and needs a sealing washer.

Good luck.

 

[North Idaho Wolfman]

Most likely BSPP fitting

 

[TheOldHokie]

I am having a problem finding the correct flat face hydraulic connector to fit on my Kubota KX040-5.

I thought it was a #10 ORB, but even though it is very close in size it won’t thread.

According to local hydraulic shop it is a #8 British thread. This does thread but I am concerned that it might not seal since it doesn’t have a O-Ring at the base and instead relies on a bevel to seal that the coupling doesn’t seem to have.

The attachment is a hydraulic post hole digger, and the max flow is a little over 17 GPM. It has a Holmbury HQ12 coupler.

Can anyone please provide help on what fittings I need please?

Are you trying to mount a coupler on the pipe?

What does the other end of that male flat face coupler look like?

What is that plug you are holding in the black gloves?

It appears the fitting on the pipe is a BSPP female oring port.

 

[EPIC]

Thanks for collective wisdom, I appreciate the responses. I will check on BSPP fittings.

Are you trying to mount a coupler on the pipe?

What does the other end of that male flat face coupler look like?

What is that plug you are holding in the black gloves?

I was going to mount the flat face connector to the silver adapter on the pipe. Rational is that we have a lot of invasive pepper trees and the fear is a branch may rip the coupling and more parts between the couplings and the orange pipe means less chance the orange pipe is damaged… But inversely it could just provide more leverage to damage orange pipe?

Picture of other end of male flat face connector is attached.

Yes I am holding the plug with the black gloves.

It is my understanding that the excavator was made in Japan

Is the collective advice that I should just mount coupling to orange pipe directly?

 

[EPIC]

Ok, this is what all the BSPP fittings I found look like. I would expect a ORing on both sides of fittings not just one to get a good seal.

What am I missing?

9006-10-08 | #10 SAE/ORB Male x 1/2" BSPP Male

Check out the deal on 9006-10-08 | #10 SAE/ORB Male x 1/2" BSPP Male at DiscountHydraulicHose.com

www.discounthydraulichose.com

 

[North Idaho Wolfman]

The BSPP seals on the inside on the taper not on the O-ring.
The O-ring is on the O-ring boss side of the fitting, are your flat face connectors O-ring boss connections?

 

[EPIC]

The BSPP seals on the inside on the taper not on the O-ring.
The O-ring is on the O-ring boss side of the fitting, are your flat face connectors O-ring boss connections?

Yes! That is my concern. The existing female coupling (on excavator) doesn’t have a taper for the adapter to seal to.

The flat face connectors I have are #10 ORB.