Question about Pentair Dynamo 3/4 Hp Above - Ground Pool Pump

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Our dynamo CA04-26 pool pump is making a whining noise. Can we oil it somewhere? What could cause it to make this new high pitched sound?

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The bearings are likely failing and they are not open to allow for re-lubrication. You can replace them yourself or take the motor to a local electric motor repair shop to have it done for you. A shop will probably cost about $40 to $50 for parts and labor. You should also replace the seal at the same time. The cost for the seal is under $10 and the labor shouldn't change.

Posted on May 29, 2010


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Which way does the pump suppose to whine?

Thank you for posting your question here on

A pump can whine for several reasons. Some noise is normal with a pump but when it is very noisy it is indicating a potential problem. If the seal is damaged it may whine and then it usually starts to leak(sometimes a seal leak allows water to get into the bearing at the pump end and reduce its lifespan). If the bearings are damages they will make excessive noise before doing other bad things. These are the most common noises indicating a problem.

If I hear one of these whines I usually make a mental note and let the customer know there is a potential issue. I give them the option of letting it go until it either starts to leak or worse or fixing it right away. Sometimes it operates normally for quite a while while other times it fails very soon. I hope this helps.

If this answer does not resolve your issue, please comment with additional information before rating the answer. Positive feedback is especially appreciated once your problem is solved! Thank you.

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The plastic where you screw the clear plastic lid on top broke on one side so the lid does't clamp down. Is there a way to repair this or replace just the tub part without buying a whole new pump? The...

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This site shows a separate part for the strainer body, but I'm not sure it is separate.
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I have Hayward Centurian SE 2 hp pool motor pump,around 15 years old. Just the other day it started making a loud whining noise. Is there a quick fix for this?

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Whining when i press gas

normally, the only part of your automatic transmission that will make a whining noise is the pump. it usually whines when iether the fluid is low or more commonly when the transmission oil filter is getting plugged up.

the power steering pump will also make a whining noise too.

turn the wheel all the way to the right and hold steady pressure against the stop. this puts maximum force on the power steering pump and, if the power steering pump is the one making the whine, it will change the sound of it. (usually louder).

if the trans pump is making the whine noise, it should sound different in neutral compared to drive. this test will really only work if it make the noise without the vehicle moving. if it wont do it at idle hold the rpms at 2000 or so.

if you decide the noise is coming from the transmission, and the transmission filter has not been replaced (assuming you installed a used transmission), replace the filter by removing the oil pan.

oh and also, if it is the power steering pump you should be able to make it make the whining noise while the vehicle is stationary. if it wont make noise unless its moving its not the power steering pump.

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1 Answer

My pump is making a "high pitched" whine . The pump has a sticker that states " Century pool/jetted motor, Serial # CA05F49034, Part-7-193262-28, Type-SP, FR-w484,HP- 1.5 SPL, 12 Amps

could be its has air getting in when its pumping or the motor bearings are worn out or just dryed out it could even be a partly blocked inlet filter causing this pump to whine,
try looking for inlet pipe air leaks and blocked filters
or some thing resting on the pump impeller

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