Servicing Scott Heel Brakes on a Super Cub

[sierrakilo99]

I'm working on a 1953 Super Cub with Wipaire floats and need to replace the brake pads. The slave cylinders are Cleveland single puck style, and the heel brakes are operated by Scott type master cylinders (without reservoirs). When I compress the puck with a C-clamp, the puck doesn't compress all the way in, like pressure is trapped in the system, and as such the pads drag when installed and torqued to spec. Its like the system doesn't have a way for the 'excess' fluid to go back into the reservoir when the puck is compressed.

I opened the bleed screw on one side and compressed the puck, allowing some 'excess' fluid to escape, and that side no longer drags, but I'm not convinced this is the correct process.

Anyone have any experience with these old style systems?

Thanks for the help.

sk

 

[JimC]

 

[sierrakilo99]

 

[JimC]

 

[Ed Dartford]

 

[sierrakilo99]