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Posted: Thu Feb 22, 2007 9:16 pm
by Bruce Hamilton
Follow the instructions, and systematically separate the pump from the rest of the system. and identify which module leaks. The manual notes that you may not see liquid from a leak.

If it's the pump, they suggest possible causes as:-
Loose or leaky valve fittings.
Loose purge valve.
Contaminated purge valve.
Loose pump head screws.
Leaking seals or scratched plungers ( this would be my first guess ).
Leaking outlet valve.
Leaky damper.

Good luck,

Bruce Hamilton