bleeding Duo Discus brakes

Brake cylinder hone?


"Three Uniform" wrote in message
...

Changing topic to "problems with Cleveland Brake Calipers"

Thanks Craig for posting Bumpers's link again.
I called Joe at Sierra Specialty Automotive (brakecylinder.com)
He stated that his insurance company does not allow him anymore to
work on aviation parts.
(The part could of course be from a historic tractor)

But more importantly, he concluded that the composition of the
aviation alloys does not match with his process and procedures of
fitting sleeves.
He had to deal with a number of returns.
So, he is not providing this service anymore.

In talking to Joe, another point came up.
The Cleveland caliper has the O-ring on the piston.
The sealing is against the bore in the caliper.
Therefore the surface of the piston is not that relevant, but the
condition of the bore is very much so.
In his opinion, the bore should have a polished finish.
When I dis-assembled mine, it definitely did not have a polished
finish.
Apart from some corrosion, there seemed to be a fine, regular, ringed
structure in the surface of the bore.

Any ideas on this ?

3U