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MCP350 making loud buzzing noise

post #1 of 4
Thread Starter 
its pumping fine but making loud buzzing noise

anything that can silence this?

it wasnt this loud when i first got it and im pretty sure there isnt any more air in the loop
Edited by eosgreen - 7/18/11 at 5:14pm
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post #2 of 4
Thread Starter 
bump
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post #3 of 4
can some one pleasetell this guy that it takes more then one hour to get air out of the loop lol
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post #4 of 4
Already replied to his PM's. Something about his RES blocking water and allowed air into the pump. He's not sure if it ran dry for a period of time to damage the pump. I gave him the following info to help if a pump runs dry, but does not sieze up. ...

If the pump made some weird noises due to a short time running dry, take the pump apart, put some 3in1 oil on the white ceramic ball, put the impeller back on, twist the impeller back and forth a few times and reassemble the pump.

When the pump is run dry, the plastic fingers of the impeller become brittle (quickly). The 3in1 oil replenishes those plastic fingers to work again. It only takes two drops.

If anyone ever buys a DDC/D5/D6 pump with the plastic and stainless steel cup impeller, before ever running the pump, try the 3in1 oil first.
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