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Weird brakes

In message <33AD174D.BF8@isd.net> RC Ringlien writes:

>    To sumarize: all 4 brakes drag after car heats up (approximately 5
> miles of driving) and the engines has to really work to overcome this.
> I've deduced that the bomb is probably shot.  The brake light blinks
> after stabbing the pedal, but I only start to loose boost after
> everything heats up.  When car is cold and ignition off, I can pump the
> brake pedal 20 times before I start to loose boost. A Robert Russell had
> the same dragging problem a while back but I can't locate the message in
> the archives and lost his address in an e-mail crash.

I don't think it's the bomb.

I also don't have the official 200T documentation, so the following is

Do you have the later type of "bomb" - usually mounted with its axis
horizontal - and _TWO_ sensors attached to the casting at its base?

If so, the axis of one of the sensors (supply pressure) is parallel to
the bomb's axis, and the axis of the other (bomb pressure) is at right
angles to it.  Disconnect the first and see if your "stabbing" light
still comes on.  If I'm right, it won't.

I suspect that the brake servo itself is leaking internally into its own
return line.   There are two types of servo fitted to the later cars -
from the factory they mostly came with cast-iron cylinders but
replacement parts have been light alloy since 1987.

 Phil Payne

 Phone: +44 385302803  Fax: +44 1536723021  CIS: 100012,1660