Re: Master Brake cylinder

[etlddle@domain.elided ( David Luke XL/EE )]

This happened to me, although a little more gradually.
The seals in the master cylinder harden off and allow fluid to
leak back in an unpredictable manner.

There are two pressure chambers in the master cylinder,
and overhaul consists of a new seal kit (10UKP) and
the labour to fit it (an awkward job requiring long nosed circlip
pliers).

A brand new master cylinder is not a bad plan as they are about
100 UKP and you don't have to mess about with the overhaul or
worry about the bores in your old one being scored.

Plus, you get a nice new plastic reservior which you can actually
see the fluid level inside of at a glance.

Seperating cylinder and servo is only possible with the whole
contraption out of the car (although someone on this list made
their own special spanner to avoid this) but it's a five minute
job removing it from inside the bulkhead (firewall)

If you got sponge first, then no stopping, the servo is probably
fine.

Bleed all four wheels gently on top up after reassembly or the PDWA
might decentralise.

Hope this helps, Dave Luke