Ok, I have a braking problem that I havent been able to sort out.
I have an idea of what *might* be wrong, but I wanted to bounce the
problem past the list before I run off any buy new parts.
Here are the facts:
73 MGB, dual circuit brake system, rebuilt calipers, rebuilt master
cylinder (both rebuilt by me), new wheel cylinders, new brake lines,
hoses, pads and shoes. All components were replaced or rebuilt.
I am using DOT5 brake fluid (silicone).
Here are the symptoms:
After driving for about 10 mins, both calipers begin to drag, the
pressure differential warning light turns on (and remains on) and
eventually the front brakes grab- you can smell the pads heating up.
If I let the car sit for about 15 mins, the P-D-W goes out and the
process repeats again. The pedal is always firm; and there are no
obvious leaks, although I have noticed a tiny spot of fluid on the
drivers floor mat, (about the size of a quarter). I attributed
this to a loose fitting (or a drip from the pedal box due to a sloppy
filler :-)
I know what you are thinking- no, I am not driving the car on
public streets like this; these are just test runs on private
property. Also, the rubber brake hoses are *not* collapsed,
I could gravity feed new fluid through them when I installed
them a few months ago.
I suspect that the master cylinder is not distributing fluid to
the rear circuit; but I am not sure how this could cause the
front brakes to bind- I would have expected the front to work
fine, but the rear to not work at all. Any ideas??
--Scott
Scott Hower --> howersl@ttown.apci.com
Air Products & Chemicals, Inc.
7201 Hamilton Blvd Trexlertown, PA
(610) 481-2646
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