This is from a friend who is inheriting his family's SC and bringing it back to Seattle from Maine next month:
I have some folks looking over the Super Cub and they seem to still be stumped by the brake issue. They have bled the brakes, looked at the pads, the discs may be a little pitted, replaced O-rings, but still they do not seem to be functioning as they were before the plane was sitting for a year and a half. It is currently hard to hold the plane still at ~1500 rpm for the run-up. Any thoughts?
The Airplane has 6.00x6 tires.
IMHO. If you can't hold the airplane with 600 / 6 tires then something is definately wrong. You should be able to lock em up.
Do they have a "firm pedal"? As Mike said, make sure that the pins are lubricated and check the hoses. If they are not high pressure type then spend your money on that; and not new wheels unless yours are corroded up. If the calipers are installed on the top side as Piper did then you can often trap air in them or the tubing. A little bit of air and you get mush for pedal feel.
If the new owner is not familiar with heal brakes or has someone that will need instruction in the airplane and will be keeping small tires; Don't install the brake boosters....yet. Too many cubs have been flipped on their nose or back from heavy feet on the brakes. If your going to large tires like the Bushwheels then that is a different story.
It shouldn't take a big pile of money to fix your problem.
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