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Old 03-23-2013, 05:35 PM   #1
mynameiswoody OP
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Joined: Mar 2010
Location: ATX
Oddometer: 20
quick disconnects

Do any of you notice air seeping into the lines after you connect/disconnect a few times? I can't help but think that this happens.
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Old 03-24-2013, 01:02 AM   #2
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Joined: Mar 2008
Oddometer: 154
If you check out JEGS or Summit they have many Residual Pressure Valves for brake systems designed to prevent backflow in lines. Of course they can only flow in one direction, from master to wheel cylinder, so that may allow some air entrainment anywhere past the point of disconnect, that's unavoidable. But they will prevent the line & master from getting air in them so it minimizes how much bleeding you might have to do.

Bleeding's an easy job if you make up a cheapo one-man bleeder of a piece of rubber fuel line to fit over the wheel cylinder bleed nipple, running down into a little relish jar or similar, with tip of bleed hose submerged under about an inch of fluid in jar. With all connected just crack the nipple and pump pedal a few times, keeping a close eye on fluid level in master. Close nipple & check pedal pressure. If all good I crack it again for one more stroke of pedal then seal it up. Neat & clean plus you can get a visual on condition of fluid coming out. Because of thickness of fuel line it can get a little tippy so a larger sort of jar is better to help keep it upright, say 16 oz.. is best.
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Old 03-24-2013, 10:42 PM   #3
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Location: Tacoma, WA-ish
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Originally Posted by mynameiswoody View Post
Do any of you notice air seeping into the lines after you connect/disconnect a few times? I can't help but think that this happens.
I agree that it's easy to be suspicious of those QD's, but I get air into the rear brake line of my Guzzi pretty easy and it's a completely closed system. I've decided that there is at least one air gnu living under my garage floor and it comes out at irregular intervals when I'm not around to mess with my brakes.
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Old 03-25-2013, 08:27 AM   #4
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Joined: Sep 2008
Oddometer: 1,054
Turn the female end up right. Take a screw driver and depress the check ball long enough for a drop of fluid to form. Then put the ends together. This will help keep any air front getting into the system.
Jay G
DMC sidecars
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