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- Posts: 405
- Joined: Wed Jul 18, 2012 6:45 am
- Location: Germany
My Agilent 1100 quat pump does not build up pressure any more. With opened purge valve it produces some drops, then the last hanging drop (but not more) is drawn back from the outlet, then it pumps again some drops. Drops come out when the piston on the right side moves forward.
My first idea was the check valve. I replaced the cartridge => same symptom.
Then I exchanged all seals => same symptom.
Where can I look next?
Thanks in advance
Jörg