G'day all!!
I am in a panic since I am leading a club run this weekend. So I need
help in a hurry.
As part of finishing my front end rebuild, I replaced the front brake
lines. While the front end was still up on stands (with rear wheels on
the ground), I decided to bleed the system without installing the front
road wheels.
First question.
Would the relative elevation of the front end vis a vis the rear end have
anything to do with the problem which follows?
My car has a Pressure Differential Switch. Both Haynes and Bentley tell
us to remove the wire from the switch and back it out three and one-half
turns.
Second question.
Does this mean turning the switch body or does the point of connection of
the wires turn within the switch body? I was turning the switch body.
For cars equipped with Pressure Differential Switches, Haynes says to
bleed the brakes starting with the front wheel closest to the master
cylinder, then right front, then the rear (I did the left rear then the
right rear). Bentley says to do the farthest from the master cylinder and
then work to the closest.
Third Question.
Which is the correct order?
I bled, in turn, left front, right front and left rear. These three
wheels went OK but I noted while doing the left rear that while fluid was
coming from the brake cylinder when the pedal was depressed the fluid
level in the master cylinder did not seem to be going down as fast as it
had while doing the front wheels. In fact at one point (after 3 or 4
pump-bleed cycles) I wondered if it had gone down at all. As we finished
each wheel the pedal got sequentially harder.
I then tackled the right rear. With my wife on the pedal, I opened the
bleed screw a couple of times. All of a sudden, per my wife, the pedal
dropped a couple of inches further than it had for the other wheels. This
sudden new bottom for the pedal was accompanied by what my wife says was
a clang. At the same time I heard what seemed to be sucking sounds from
the area of the master cylinder and the servo. After this event we were
never able to get pedal again even though I tried to bleed all of the
wheels
Fourth Question.
Does anyone know what the problem is? And what can i do to solve it?
Thanks for your help
Preston
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Our newly painted 80 MGB LE is on the road and our 62 MGA 1600 MK II needs
some work Betti Ann and Preston Smith in the Head of St Margaret's Bay,
Nova Scotia, Canada. email: prsmith@navnet.net
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