Gary writes :
>I rebuilt the brake system on my TR6 about 6 months ago
>from master clyinder, pdv, lines and repair kits and at
>the same time swithcing to silicon brake fluid.
>
>Here recently the braking is not consistant. I have brakes but
>after a long drive they seem to be weak and I have push hard on the
>peddle. If I pump them they are back to normal.
>
>thanks for the feedback
>
>Gary Oehrle
>
>oehrle@lsil.com
Hi Gary, have you checked for a dragging brake ? I don't know how the
silicone fluid reacts to an overheating problem, but since you say the
problem occurs `after a long drive', it might pay to feel the wheels to
see if you have a hot one.
Also, on other cars with vacuum-operated brake boosters, there's a check
you can make upon start-up; pump the pedal a few times and hold it down
before you start the engine. Then, after the engine starts and pulls a
vacuum, you should be able to feel the brake pedal drop just a little,
say 1/2" before it firms up again. Seems to me this test should work on
any car with a vacuum servo.
Best regards,
Tom Tweed
SW Ohio
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