"Jim Beckman" wrote in message
...

This thread started with the necessity of replacing the brake master
cylinder, right? Did anyone mention why it needed replacement? My first
guess is wear or corrosion in the cylinder bore causing it to leak
pressure. If this is the case, there are places that will bore the
cylinder and sleeve it with either stainless steel or brass. It's done
all the time for old cars.

On the other hand, I don't know anything about the legality of doing that
for an aircraft brake system. And on the Gripping Hand, I would probably
do it that way myself.

Jim Beckman


One shop that does a good job with this is:

http://www.brakecylinder.com/

Part of the problem, as has been posted before, is that DOT brake fluids are
hygroscopic. If brake parts are aluminum, then water in the fluid can
promote corrosion. Anodizing the aluminum parts, or sleeving them in the
case of caliper housings, can help prevent this. To test to see if a given
part is anodized, say a piston from a caliper, touch the part with the leads
from a ohm meter (digital meter set on ohms). The anodize layer is an
insulator and won't conduct.

bumper
QV and MKII