Originally Posted by Al_The_Man  I think I know the type of pump you have, they have four carbon-like blades that are flung out at centrifugal force against the chamber?
Is there a possibility you can get replacement blades from the manuf.? it is a very simple design.
Are you sure the noise is coming from the vanes?
Al. |
Dear Al,
Yes, the vanes are flung out by centrifugal force. I looked up the generic design having taken the thing to pieces. Quite an elegant concept.
The noise is now pretty much as it was when it was working OK. The noise only happened when I stuffed a load of crap from the filter into the pump. It now sounds pretty much as it did. It always sounded noisy before it managed to pull a vacuum, and then became pretty-much less so. It still does with my finger blocking the hose, but it doesn't in the bag.
I think it's a volume through-put problem.
The manufacturer is no longer in business. Maybe time to buy another pump.
Actually, I can see how you can "bed-in" the vanes as they rotate at the circumference, but how do you do that at the top and bottom of the vane??
Thanks
Best wishes
Martin