Quote:
The issue of the reservoir "cover gasket," and how it effects the operation of the compensator valve seems to be a key that could make or break the whole operation of the unit.
Guy, you seem to be confusing the
compensator port valve with the
relief port, which are two completely separate things with completely separate functions. The advice on removal of gasket material was made WRT to the relief port, which is nothing more than a passage. With the BTV in-car and the reservoir cover removed, the most you could do to the compensator port valve is tickle it. You're better off removing the unit for service on the workbench.
As the 51-54 shop manual is a bit scant on details, other than overhaul, you should download the
55-56 Brakes section, which Howard cited, and study the cross-sectional diagram, which identifies all the parts by name, and the text, which describes the theory of operation. Though there are some differences in details from 52-56
(mainly in the vaccum section), the basic hydraulic system and operation is the same.
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