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Old 04-30-2011, 01:40 PM
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funola funola is offline
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Join Date: May 2005
Location: NYC
Posts: 8,249
The shaft on the lift pump should be spring loaded. I think the way the lift pump should be tested is:

Plug outlet and pressurize inlet with pump shaft submerged in liquid while pressing and releasing the cam to simulate operation. No bubbles should be seen.

repeat above except plug inlet and pressurize outlet
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