Squeaaaaaaal like a pumpy!

[Bainbridge]

Our wort pump has taken to Singing Us The Song Of Its People every time we whirlpool or transfer at high speed. It will form the chorus line for VPRV, our in-house brewery-themed industrial band's next hit single Squealy Pump, but on the whole I'd prefer our hearing and sanity intact.

It's ye standard 1.5 horse Ampco AC+ run on a VFD. Pump seal kit's been replaced on it a couple times already. So, anybody got any sweet tips and tricks out there to make this thing STFU?

Promise we'll give you Executive Producer credit on the next album.

[beerguy1]

Is it cavatating? You can close down the valve on the outlet side. Or try cooling the seal with a bit of water. It makes mine nice and quiet

[brewmaster 2011]

it is most likely the the wort temp. try cooling down the seal.

[Bainbridge]

We have noticed spraying it with the hose seems to help


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[Bainbridge]

Cavitating is a whole nother interesting sound. No, this is SQUEEEEEEEEEEEE


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[TGTimm]

If you're lucky, it's the seal. Wort will destroy an un-washed seal incredibly fast--our C114 vorlauff pump seal lasted less than a month, I put a water line on the external seal, and the nes seal is five years old without a problem.

If you're not lucky, it's the bearings. The only cure is generally a new motor. May as well replace the seal while you're at it.

A simple stethoscope will help to determine which it is. Use a piece of pipe, tubing, or even a screwdriver. Put the improvised 'scope to one ear, with an earplug in the other. Try putting the other end on various parts of the pump 'til you find where it's the loudest.

[BrewinLou]

I have never replaced an electric motor just because the bearings went out. Pressing in new bearings is cheap and easy or you can have an Electric Motor Repair company do it for you for a fraction of the cost of a new motor. The only time you replace the motor is if the bearing seats have been ruined by using the bad bearings too long. If the armature and bearing seats are good it is a cheap fix.