Naf,
I am installing a pressure gauge
in my panel(by Aerotronics-should be done in a couple of weeks) with a high/low
pressure switch connected to a pair of transducers mounted at the pump next to
the pressure switches. The gauge and transducers were from UMA and I have
included the link below. After years of reading about others' difficulties
diagnosing hydraulic problems, this seemed a worthwhile expenditure in potential
time saved as well as knowledge of what the system is doing.
Kai Ogston