My brake lines are 1/8" NSR thick wall tubing designed specifically for brakes. I am now leaning towards the possibility of binding in the caliper even though those are new it's worth looking at. Don't know what else it could be. The pedal geometry is identical to the left pedal so I don't think that is the issue.
Mark Jones (N771MJ) Oldsmar, FL [email protected] www.flykr2s.com On Wed, Jul 2, 2025 at 10:05 PM Jeff Scott via KRnet <[email protected]> wrote: > Mark, > > I often times find braking issues where you get a hard pedal, but little > brake action when they are constructed using 1/4" nylaflow tubing for the > brake lines. With a longer run to the right brake, you tend to lose more > of your braking authority to wall expansion (stretching) of the 1/4" > plastic. The easy fix is to replace the /14" nylaflow with either 3/16" or > 1/8" nylaflow. The smaller tubing still stretches, but the surface area is > so much smaller that the brakes still work well. I found this issue on my > KR 28 years ago, then replaced the tubing with 3/16" Nylaflow, which was > still in it when I sold the plane 24 years later. I have fixed brake > issues on numerous EAB aircraft by swapping out the 1/4 to 3/16" lines. > Arion Lightnings now recommend using 1/8" nylaflow lines for brakes. This > may or may not be your problem, but if you have 1/4" nylon or plastic > tubing, I would bet on it. > > -Jeff Scott > Arkansas Ozarks > > *Sent:* Wednesday, July 02, 2025 at 8:31 AM > *From:* "mark jones via KRnet" <[email protected]> > *To:* "KRnet" <[email protected]> > *Cc:* "mark jones" <[email protected]> > *Subject:* KRnet> Brakes > Hell All, > I am so ready to fly WunderBird. I have all issues resolved with the > exception of my right brake. It is a Grove caliper with Matco toe operated > master cylinder. My issue is no braking authority to amount to much. I > really have to fight it to get it to turn right. The pedal is hard. It will > only depress about 1/4 of an inch. If I pump it, I get some braking but > nowhere near enough. I can make a left turn on a dime with ease. The left > pedal has a good inch of depression. Is there too much fluid in the right > system? Can air in the system cause a hard pedal? I thought air in a system > creates a mushy pedal. Any help or ideas are much needed and appreciated. > As soon as this is corrected, there will be another KR in the air. > > Mark Jones (N771MJ) > Oldsmar, FL > > [email protected] > www.flykr2s.com > -- KRnet mailing list [email protected] > https://list.krnet.org/mailman/listinfo/krnet > -- > KRnet mailing list > [email protected] > https://list.krnet.org/mailman/listinfo/krnet >
-- KRnet mailing list [email protected] https://list.krnet.org/mailman/listinfo/krnet
