Cowdoodi,

Sorry, nothing for SAPB. I only have 2 Westinghouse units that we service. When we mod units, we become the owner of any equipment, parts, prints and manuals to the old equipment. What little info I have for the Hydrualics, I can only say my relay code book describes 50 relay as “Master call relay on PB control - only allows one call to be registered”.

Is there more then one 50 relay (50a, 50b) on the controller?

JKH