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Originally Posted by dogbait
I've had two Iwaki's (one new, one second hand), and both are noisy, making a sort of vibrating sound.
Any restriction does it unfortunately, they like fat, 1/2" ID tubing which is a bummer since my tubing is all 3/8" ID. Make sure you minimise restrictions, particularly on the inlet.
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I think mine is because of the bearings. When I put my ear right next to it it sounds like bearing noise. When I took the head off the pump and turned it on the motor was pretty quiet and didnt vibrate much at all. But with some restriction maybe the bearings arent keeping the shaft aligned like they should. I dunno...
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Im thinking of getting a cheap md20rt and switch the heads. Is there any chance the problem could be my head?