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TS Flightlines can make whatever you need. On my 9 I used #3 Teflon/Stainless line from the firewall to the brakes and they put a #4 fitting on the #3 line. Caliper has a #4 AN fitting. Line was flexible enough to just circle around the gear leg like the aluminum line used to.
I think Holley bought Earl’s. Back in the day they were about the best you could get.
Blain---use AN822-3D (90*s) and -3 hose ends. We do this on the RV14s and others. We have jump sized hose ends to go from -3 hose to -4 as well..
It’s a common area that many folks simply don’t seem to understand how to do correctly.
I have high regards for Tom at TS however I prefer to "build" and not just "order". What I was asking was for a single fitting that captured the tubing with, probably an olive compression with 1/8" MIP on a 90. All in one fitting without doing a 90 adapter and flare to hose-1 less joint to leak.
Probably mishandling when removing the caliper to change brake linings caused the leak
Tom might chime in but thats probably less than 10% of what they should be tested to. It’s been a long time, but all the hoses I built were tested to something like 1500psi.
Blain----a 1 piece Male 1/8 NPT /90* to teflon is most probably something you wont find. See----NPT threads are tapered, so your final torqued orientation may not be in alignment with where you want the hose to route. And if you did, then once you assembled the hose end on the hose, you'd have to spin the fitting around and around to get it tight---imagine doing that with long hoses. Sorry, but I'll stick with the AN adapters and flared hose ends. Thats a proven reliable solution.
A compressor 'might' go to 150 psi if you really crank the regulator. We have Proof testing test benches that can go to 7500 psi. We normally test everything at 2000 psi for -2 through -8. -10 through -16 is 1500-1000 depending on size. Thats because we use a different hose. So if you are testing your brake hoses or retract hydraulics (
) at 150 psi, thats not really doing a proof test, since max brake pressure might get to 450, and retract hydraulics to 1200-1500 psi, dependent on the system.
Like Tannerite for us less-professional folks....?A compressor 'might' go to 150 psi if you really crank the regulator. We have Proof testing test benches that can go to 7500 psi. We normally test everything at 2000 psi for -2 through -8. -10 through -16 is 1500-1000 depending on size. Thats because we use a different hose. So if you are testing your brake hoses or retract hydraulics (
Just because inquiring minds might want to know, when we are doing development on new hose ends to hose, espeically in the -3 to -8 range, we run them to 7500. Why? LOL, I'm alittle crazy; Im the son of a US Marine Explosive Ordnance Disposal Officer, so blowing things up are kinda fun; and we need to know the yield points. (Sometimes just for giggles, I'll undercrimp a hose end and run the pressures up, just to hear the fitting blow off). Dont worry, stainless proof test cabinet with shatter proof glass ( I hope). In our production shop, they PT EVERY hose they build, and data tag them, with a paper trail, to assure our customers of a quality assembly. Tom
I know, but it was the best i could do in my shed.
Interesting... i wonder how you release all the pressure. Looks like it would make a mess!
On a similar note, way back in the early days, I made a pressure tester from a cleaning tank and a hydraulic ram pump. 2 different gauges, 1 was to 6000 psi, the other was to 10,000, the max pressure of the pump. Worked fine as a portable tester. Since teflon was impervious to fluids, I used ISO46 hydraulic fluid, for the orings in the pump. YEP, had to flush the hose really good afterwards. I have to say the test cabinets and systems we have now are ALOT better. But for those that want to make your own assemblies, this is an easy way to test them. YES---contain them in some sort of cabinet----just in case!6:20 in the above video....
How much pressure can it make....
You make a good point, Tom. Thinking about it further I realized even the banjo fittings has 2 joints. Gotta' quit trying to reinvent the wheel!
Blain, the industrial guys have a NPT Swivel hose end, not unlike alot that you see from the race car guys. Basically a stem, and oring setup, with a crimped back threaded male NPT. Works awesome---for about a year. The constant pressure buildup and reduction, makes the orings begin to leak, which defeats the purpose. Symetrics has them---used in high pressure systems. The stem is on roller or needle bearings, with teflon seals. Awesome product, but take your American Express Card with you.
