brakes rules
brakes rules
(OP)
Parker A-LOK compression fittings are claimed to seal at the pressures that might be found in a hydraulic brake system.
I'm thinking there may be some specific statements in SAE or DOT rules/standards/guidelines that disqualify anything but double flare or metal gasketed joints.
Does anyone know a good reference?
thanks
Dan T
I'm thinking there may be some specific statements in SAE or DOT rules/standards/guidelines that disqualify anything but double flare or metal gasketed joints.
Does anyone know a good reference?
thanks
Dan T





RE: brakes rules
Cheers
Greg Locock
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RE: brakes rules
RE: brakes rules
I'm pretty sure I have seen something, but ??? We all know how to do it, just nothing in print, not even in the SCCA GCR.
I have some brake tubing flare tools (Imperial and US spec) that have instructions for varying makes of car, etc. I've seen catalogs from parts mfgrs that make similar claims as you have...just nothing official. Perhaps someone has access to OEM specs?
Rod
RE: brakes rules
RE: brakes rules
I don't know if that is relevant here; I'm just saying.....
rmw
RE: brakes rules
"This safety steel tubing must be double lap flared at the ends in order to produce a strong leak-proof joint."
The exact same wording is used in the 1965 Corvair Chassis shop manual and the 1972 Chevrolet Passenger car Service Manual.
RE: brakes rules
They might work fine, or they might induce some odd failure mode in the tubing, or fail themselves in some odd way because of the tubing's unusual nature.
Why bother?
Mike Halloran
Pembroke Pines, FL, USA
RE: brakes rules
I wasn't aware 3/16" brake tubing is double wall.
On some car list someone posted they've been using the A-Loks at work in high pressure apps, so started using them on his car. I didn't and don't think that's right, so I contacted Parker tech support, expecting them to squelch the idea, in preparation to alerting folks it might not be a real good thing to do. So far I have nothing. I'll be Off to the UMass Lowell tech library for research on that and a few cracked gear topics.
RE: brakes rules
On one note, I did see compression fittings used on the hydraulic brakes of a go kart...
I agree, Mike...why bother? The US double flare, the AN 37 degree tapered, the Imperial "bubble flare" work just fine...again, why bother to "re invent the wheel"?
Rod
RE: brakes rules
RE: brakes rules
I seem to recall a friend's racing kart used nylon tubing, at least for a spell back in somewhat less litigious times. I never worked out the attainable pressures, but That suggested to me the pressures were less than the 1000 psi plus in car brakes. Also, that concerns about the plastic tubing being abraded or otherwise damaged were not considered important.
RE: brakes rules
Also line pressure in a cart might be lot lower.
Regards
Pat
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RE: brakes rules
250cc, six speed, 3 disc brakes (solid axle at rear with only one disc)...
A bit aggressive on acceleration and braking would be an understatement!!
I wish I were not so old and "fragile"! ;o(
Rod
RE: brakes rules
RE: brakes rules
http:/
http://www.zoomkarts.com/product.asp?productID=77
I simply hit 'go kart' and ended up with this. I talked to Don about his kart and he said the brakes were Airhart, just a single rear disc on his cart, though.
Rod
RE: brakes rules
Point was, I used all the brakes those things had, and it often wasn't enough. Had to use the 'driving sideways' skills I honed when I WAS a kid driving my dune buggy. I wasn't afraid to throw it into a skid.
It was, however, the most fun this old man has had in a very long time. Those younger guys just weren't ready for my driving style.
Back to the topic, I never did bother to look at what material the brake lines were, but I did use all the brakes that it had.
rmw
PS: afterward we played laser tag and I won both of those. But I guess that is off topic.
RE: brakes rules
RE: brakes rules
RE: brakes rules
go broke try to go 150 mph and if it will fit drop it in, if it dont get a plasma cutterand the welder
RE: brakes rules
The double flare has the proven ability to withstand vibration, side forces and is able to be disassembled and reassembled several times with out leaking.
I have not seen that dependability from the old classic ferule type compression fittings.
I for one won't jump at a new compression fitting until it has been proven in use for some time by others.
Bill
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