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For what is worth...and I have not bled my airplane brakes this way yet
-
On small displacement systems, for clutch/brake fluid replacement, I use a
veterinary syringe - a 60 cc syringe costs about $2.50 and you can throw it out
when you are done.
Cheers
Scott
----- Original Message -----From: [EMAIL PROTECTED]Sent: Monday, February 27, 2006 5:36 PMSubject: Re: [COUPERS-TECH] Bleeding Brakes----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----Tandy,A couple of thoughts based on my own experience bleeding the brakes on my Alon:1. You may want to wrap your master cylinder with a rag before you start in case you accidentally over fill the system. That way you won't end up with hydraulic fluid (or brake fluid - not sure what your plane uses) spraying around the cockpit while you are pumping in the oil from below. Wrapping a rag around the cylinder is much easier than cleaning up the mess that will probably result if you don't wrap a rag around it.2. I used a small pump-type oil can with about a 1 foot long piece of clear plastic hose on it to pump fluid into the bleeders at the wheel cylinders. If the hose pops off of the fitting, it can be secured with a small ty-wrap.3. When filling a drained brake system, I pump about 20 or 30 shots of fluid into each wheel cylinder, and then alternate back and forth between the two cylinders with about 10 shots in each side until the cylinder is filled. My thinking is that if you fill up one brake line and the master cylinder with fluid, but the other brake line is still full of air, then you could end up pumping a bunch of fluid out of the cylinder when you fill the second brake line due to the air pushing through the line and cylinder. I don't know if this is a real concern or not, as there's no way to know what is going on inside the brake lines while you are bleeding the brakes, but I did my Alon this way and it worked fine.4. It probably depends on the type of oil can that you are using, but I found out that with the can that I was using, I had to pump the fluid in hard and fast in order to get it to pump in at all. Pumping the can slowly didn't seem to work at all, probably because the pump in the oil can was leaking internally somewhat. Unfortunately, when this is happening, you can't tell it because you can't see the fluid moving in the plastic line between the oil can and the brake bleeder.5. If you are doing this alone, you may be able to tell when the master cylinder gets full by listening to the air and/or fluid escaping from the top of the cylinder. When you hear fluid spraying out it's over full!6. Be careful not to get the fluid on your brake linings.7. The master cylinder on my Alon has a hydraulic hose on it that has a steel braided outer jacket. Where the hose was touching the aluminum former underneath it, the former had some dissimilar metal corrosion on it. If your plane has a similar hose, take a look at anyplace it touches aluminum and check for corrosions (This is also true for airduct tubing.)Hope these ideas are of some use to you. And of course, I'm not a licensed mechanic, so check with yours before you follow any of my advice!Best Regards,
Wayne DelRossi
Alon N5618F
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