Needing Help Identifying Hydraulic Fitting Please

[BukitCase]

OK, I must have missed something (or misinterpreted) - are you saying that the male threads we see in your picture are ALSO 19 TPI? If so, then the second from the top of parker's catalog page is your style, because it matches the male/female combinations I see in your pic.

I don't see how you could use the other two fittings you linked to UNLESS the female ends they do NOT show you the inside of have the male cone - from my limited experience with BSPP, they don't usually HAVE either a male or female cone inside, more like a slight chamfer if that.

This area of hydraulics makes the stuff I've run across seem like a walk in the park - they keep throwing "metric" and "BSPP" around, and I don't remember seeing a Thread Pitch on the Metric ones - but I would be REALLY surprised if the so-called Metric ones have a 1.3368mm pitch (AKA 19 tpi)

Do you have a link to the ENTIRE Parker catalog you posted the page from? If you do, please post the link. Seems like sticking with one manufacturer you might be able to find a compatible run tee, maybe even with a NPT side already there.... Steve

 

[npalen]

Yes, the male threads are 19 TPI. The JIS Japanese Industrial Standard uses BSPP British Standard Parallel Pipe threads.

Here's some Parker stuff:

Parker Engineering Your Success Motion Control Technology

http://ph.parker.com/us/en/japanese-industrial-standard-jis-adapters-jis-fittings-1

I'm from the NPT, JIC and SAE school myself so this Japanese and British stuff is new to me also. I'm amazed that the Japanese standard uses British threads. How do you suppose that all started?

 

[npalen]

https://www.discounthydraulichose.com/v/vspfiles/downloadables/thread_guide.pdf

Thought I had this figured out but now I see, on page 12 of the attached) that the JIS type P4 mentioned above and BSPP look very similar and both with the 19 pitch thread in the 3/8" size fitting.
Both also use the inverted flare. (30 degree flare on the fitting and 30 degree cone inside the hose end)

 

[BukitCase]

Page # doesn't work for me - in that document, the page #'s shown at bottom of each page - pages 5,11,17 and 20 show the ONLY instances where the MALE threaded part has a FEMALE (concave) cone - notice in the dimensions part of each, that the 3/8" equivalent (or 10mm) is a bit different in the male thread OD - if you can get a digital caliper on your valve output using the FLAT part of the inside jaws, that might narrow things down a bit - Between those 4 pages, the similar size fittings have about 0.030" variance in male thread OD between metric and inch types.

Also, those pages show thread pitches from 17 to 19, so you may wanna confirm the 19 as carefully as possible since there isn't a lot of difference - I always try to measure peak-to-peak between the longest thread span I have access to, then divide by the # of threads to eliminate as much measurement error as possible.

I know you said this is an older machine, but if you have or can find ANY docs that came with it maybe THAT could give you the info you need - personally, by this time I would be looking at just replacing the whole loader valve/hoses with something that isn't so dang screwy, or selling it and starting over. And yeah, reality would probably set in when I actually reached for my wallet

Keep at it - if you need to borrow some of my (obvious) stubborn streak, feel free ...Steve

 

[npalen]

This is my reference to page 12:
The thread pitch checks between 18 and 20 using a pitch gauge so I'm sure it's a 19.
The illustration to the left shows a male thread with female flare.
The illustration to the right shows a female thread with male cone. Right? That is what my fitting has as shown in post #1.

 

[BukitCase]

OK, then we are DEFINITELY NOT on the same page and by that, I mean that the copy of that pdf I downloaded many moons ago has the BSPP info on page 20. Guess I'll need to re-grab the newer version of that and see what all has been changed.

And yes, the BSPP is one of the possibles I was referring to - in fact, within that doc from Discount Hydraulic it appears to be the ONLY one that's actually 19tpi AND configured like your tractor.

Looks to me like from this page

British Standard Pipe Fittings

you need a 9035-06-04 for your 1/4 NPT gauge to male 3/8 BSPP, and
a 9095-06-06-06 BSPP run tee (with a side female BSPP swivel) for your gauge adapter.

That config will ALSO let you make the NPT threads as snug as they need to be for sealing, and STILL orient the gauge any direction you want using the swivel fitting.

Good thing you don't need SEVERAL at those prices - makes me glad only a couple of my fittings need to be BSPP... Steve

 

[npalen]

With your help I believe we've finally got this. Let's have a beer!

 

[BukitCase]

Good plan - Before I "retired", I used to design, install and maintain complex instrumentation/control systems in rare metals industry involving a wide range of chemicals, sensors and processes measuring temperature, pressure, flow rate, pH, velocity, rpm, SpG, turbidity, conductivity, etc, and I don't remember ANY of that making me quite as thirsty as THIS process did :laughing:

I'll hafta save mine for later tho, not a good idea to mix alcohol with power tools, welding or anything ELSE that requires a steady hand and good judgement - and today I need to finish welding up some (typically over-designed) adjustable legs for a semi-portable work shelter I'm building -

Be sure and post a pic or two when/if we're proven right ...Steve

 

[aczlan]

Why not remove the adapter that appears to be screwed into the valve? That might adapt to an oring fitting. If it does, you could get an oring tee and a oring to NPT adapter for your gauge.

Aaron Z

 

[aczlan]

Also, you could put a tee on the high pressure inlet to the valve and get a pressure reading all the time.

Aaron Z