In reply to a message from DReinke750@aol.com sent Fri 2 Oct 2015:
The proportioning (pressure delay) valve is due for
replacement.
Steven (aka dizmando) reported this very same problem not
long ago.
Be careful – there are two part numbers and they are not
interchangeable
Your is likely the expensive CBC4233.
The one you don’t need is MHF5818AB (cheaper and easier to
source)
Look these numbers in the archives for more info.
Steve–
The original message included these comments:
The latest drive we took with the 1994 XJS came to a sudden halt when
smoke started coming out from under the rear of the car. After stopping and
checking under the car, it became apparent that the brake discs were
dragging. The calipers were not fully releasing. A careful and slow drive home
allowed the car to be safely placed in the garage. I expected to find a
collapsed flex hose prior to the rear split since the discs on both sides were
dragging. I was surprised to find no flex hose. Is it possible both outer
flex hoses in the rear decided to collapse at the same time? What’s the
probability of that.
While I was looking at the lines, I saw the pressure reducing valve on the
rear brake line under the power steering reservoir was leaking a bit.
–
'95 XJS convertible - V12 6.0L
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