JFS Posted August 2, 2012 Report Share Posted August 2, 2012 have 2yr old pump i was using to drain my elevated spa. i accidentally left pump on to long it ran about 8 min just sucking air it was making "VERY LOUD WHINING SOUND" i primed the pump and in about ten min the whining gradually dissapeared what caused whining sound? did it fix itself or have I done some permanent damage Thanks JOE Quote Link to comment Share on other sites More sharing options...
LegsOnEarth Posted August 2, 2012 Report Share Posted August 2, 2012 The whining was the sound of your pump crying because it was so thirsty. I wouldn't assume that you did any lasting damage if it only ran dry for a couple of minutes, but if this is a common occurance then I would think you may have caused some harm. As long as teh grinding goes away you will be fine. When the motor dies, it dies, and until then just run it (with water) and you will be fine. Also, in the future you should just divert a little suction to the spa and change all returns back to the pool. It will take longer to drain but there will not be a risk of running dry if you pull primarily from your pool. Quote Link to comment Share on other sites More sharing options...
Pool Clown Posted August 3, 2012 Report Share Posted August 3, 2012 Make sure that the pump is not leaking. Not even a little. You may need to get on your hands and knees to inspect properly. Quote Link to comment Share on other sites More sharing options...
Bugman1400 Posted August 3, 2012 Report Share Posted August 3, 2012 I believe the whining sound was the ceramic shaft seal that is usually lubricated by the little bit of water in the pump. Quote Link to comment Share on other sites More sharing options...
Wizzard of spas Posted August 9, 2012 Report Share Posted August 9, 2012 Is the pump leaking? If pump is not leaking, at the point where the pump joins the moter then you are good. Never dry run a pool, or spa pump. you will burn up the shaft seals, and even possibly melt the pump. Never ever run a pump dry, you wil destroy the pump (wet end). Most NOISE in pumps comes from dry bearings. What happens in most cases is,... The shaft seals begin leaking, water runs own the shaft to the forward bearings. watr gets into the bearings and drys them out, they corode, and wear faster exposed to water. the motor shaft, also exposed to water rusts, and enlarges du to oxidation, rust. This breaks the impeller shaft, crack/split, and the seals leak even more. the pump makes lots o noise, it soon seizes up, and you call me. I do moter rebuilds for 120.00 complete, Includes bearngs, shat seals, and all O=rings. Impellers are extra if that far gone. Motors make noise or they dont. Moters do not fix themslves. They do not fix themselves. Motor running in an air lock will not sound like a moter under a load. Quote Link to comment Share on other sites More sharing options...
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