Help identify this flare fitting on an oil cooler hose

[msponer]

Hi,
Do any of you know the name of this inverted flare fitting? It's on the transmission oil cooler lines on a Perkins M130C.

I am replacing the oil cooler, and my Perkins dealer is having trouble locating a new one. I found what looks like the OEM version (a Bowman DC90-Y), however, it doesn't have the fittings to connect to this hose. The ones in the old cooler don't look like they'll come out. I've been looking all over the Internet, even read a 76 page PDF on how to identify flare fittings, and don't see this style.

Thank you.

Matt

[tkeithlu]

I believe that's called an inverted flare - They are common in automotive hydraulic applications.

[tkeithlu]

I'm sorry - you know it's an inverted flare - you're asking a more specific question. But wait - fittings for inverted flares are pretty common, so I'm really confused. Could you explain what you're asking, or is this a topic for specialists only?

[msponer]

Hi,
Thank you for replying.

Yes, I am trying to figure out exactly what kind of fitting it is. So that I can order the matching male threaded part with the concave recess that this hose connects to.

Since I asked on here, I asked on a marine diesel engine group on Facebook. Very helpful folks there suggested that it's a BSP (British) hydraulic fitting. Which makes sense, since Perkins are from the UK. Photos of these fittings look right, so I am going to order these and see if the hose will connect to it. I am still looking for precise measurements of the shape of the recess for the cone, since we plan to head from Fiji->NZ in a couple weeks, and with shipping taking about a week each time, we can't have too many rounds of going "whoops, this one doesn't work" and having to try again.

[tkeithlu]

The British thread is the problem, then, because the American threads are readily available. If you haven't solved it in about a day, I'll ask my cousin, who restores antique race cars in the UK, for a source.

[cagney]

Nothing unusual here,from a European perspective.
What you call an inverted flare are used widely in hydraulics, for example common BSP fittings These are using a 60 degree flare however. Looking at your picture it looks more like a 45 degree flare. Also, the hose and crimping looks to me like a low pressure (<20 bar) assembly. So you are probably looking a metric nut (possibly a BSP nut), used in automotive applications. If you have a 3/8" hose the nut would likely be M16 x 1.5. No guarantees, all kind of weird combinations exists. Check http://www.cohline.com for parts.
Any competent hydraulic workshop should be able to help with identification of the involved fittings.
Good Luck!
/Thomas

[msponer]

Originally Posted by cagney

Nothing unusual here,from a European perspective.
What you call an inverted flare are used widely in hydraulics, for example common BSP fittings These are using a 60 degree flare however. Looking at your picture it looks more like a 45 degree flare. Also, the hose and crimping looks to me like a low pressure (<20 bar) assembly. So you are probably looking a metric nut (possibly a BSP nut), used in automotive applications. If you have a 3/8" hose the nut would likely be M16 x 1.5. No guarantees, all kind of weird combinations exists. Check http://www.cohline.com for parts.
Any competent hydraulic workshop should be able to help with identification of the involved fittings.
Good Luck!
/Thomas

Very cool, thank you.

I measured the flare, it's 60 degrees (the picture is a little off center). The nut is a 1/2" BSP. I'll check out the website you mentioned.

Thanks again everyone.

[msponer]

Well. I couldn't find the exact match here in Fiji: the inside taper is a little smaller than the original. But it works! I've been running the engine for forty minutes, in gear, and there's no leak yet (fingers are still crossed)... Thank you everyone for your help.