I think that this particular seller also sells the earlier version of the
servo.
If you are out for one, I would be particularly careful, as all these servos
are rebuild with the original aluminum core.
If the rebuild process is decent, then the pressure cylinder is re-sleeved.
Ideally, the control cylinder should also be resleved, although I have never
seen one doing this.
Also, the vacuum cylinder should be taken care of: there are modern seals
now for the vacuum piston.
The parts here are rather expensive..
On top, once you rebuild it, you should test it for leaks.
Procedure is here:
http://volvo1800pictures.com/document/Service_manual_jack/part_5_brakes_disc
_brakes/part_5_brakes_disc_brakes.pdf
I have build a test rig, that does not fulfill all the necessary tests, but
it will definitely give you an idea if the servo is working:
http://picasaweb.google.com/Volvo1800S/GirlingServoTesting#
I have rebuild 2 with it, and one of them for some reason had a significant
vacuum leak at first.
Tadek
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