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[email protected] clare@snyder.on.ca is offline
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Default Brake pedal goes half-way to the floor, only the first time

On Fri, 31 Oct 2014 16:10:17 -0400, J Burns
wrote:

On 10/31/14, 8:25 AM, trader_4 wrote:
Adjusted? I haven't owned a car with brake shoes in my lifetime. I
doubt Micky's import has shoes. And never seen a disc brake that you
could adjust.


Have four-wheel disks taken over? Well call me Rip Van Winkle! How do
you guys go parking without rolling into the lake?

The 1949 Chrysler Crown Imperial had four-wheel disks, but owners hated
them. The 1950 Crosley Hot Shot had them. Owners paid to have them
changed to drums.

The 1962 Studebaker Avanti established the standard of disks on the
front and drums on the rear.

If Micky has no drums, I believe brake mechanics could still be the
problem. Typically, runout is specified at less than .05mm.

If it's greater, and the cause is uneven transfer from the pads,
resulting in uneven disk thickness, the driver will feel pedal pulsing.

If that's not the case, and the measurement varies once per revolution,
the problem could be contamination between the disk and the hub face.

Otherwise, it could be a warped disk, which can happen putting lug nuts
on.

If a disk wiggles ever so slightly as the car runs down the road, the
caliper will wiggle. I can't speak from experience, but I imagine this
wiggling could open the caliper ever so slightly, causing a long push
the first time the brake pedal is pushed.

What kind of vehicle are we talking about? Was it ever stated?
Both of my cars still have drum rear brakes, with self adjusters which
by their very design have a tendancy to fail to adjust the brakes -
particularly on cars with automatic transmissions where the driver
seldom if ever uses the parking brake - which adjusts the brakes when
it is applied.