[Roadsters] Brake Master Cylinder alternatives

Ronnie Day ronnie.day at gmail.com
Sat Apr 25 10:37:32 MDT 2009


> Brian Hollands

> In my experience, it doesn't help there either. B I've had wheel cylinder
> fail and the result was ZERO pedal. B I still don't understand what the
dual
> cylinder is supposed to do for me.
> The only way I know to prevent a total failure is to keep the front and
rear
> circuits completely separate using two master cylinders.

A dual master is functionally two separate systems if it's working
properly, and I understand that's a big "if". The front and rear
systems are independent but there's often leakage between the two
because the seal in the middle of the dual M/C piston (supposed to
separate the front & rear system) is leaking, the bore of the M/C is
corroded or both. My Roadster's brakes have had minimal attention in
the 3 or 4 years I've owned it and I need to pull the drums and check
the wheel cylinders for leakage, disassemble and check the M/C (plus
install the firewall brace) and flush and adjust the system. I expect
I'll be pleasantly surprised at how well the brakes work once this is
all done.

FWIW,
Ron


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