Sicce Syncra 5.0 impeller

[Crashjack]

I bought a used Sicce Syncra 5.0 pump and upon inspecting the impeller, I discovered that nothing turns. In other words, the magnet/fins don't turn on the shaft, and the shaft doesn't turn inside the piece that the front of the shaft is inserted into. One of these has to turn unless I'm really missing something. I can probably use a little white vinegar and force to fix this, but I have to know what it is that I'm trying to free up or I'll destroy the impeller.

 

[Brew12]

I bought a used Sicce Syncra 5.0 pump and upon inspecting the impeller, I discovered that nothing turns. In other words, the magnet/fins don't turn on the shaft, and the shaft doesn't turn inside the piece that the front of the shaft is inserted into. One of these has to turn unless I'm really missing something. I can probably use a little white vinegar and force to fix this, but I have to know what it is that I'm trying to free up or I'll destroy the impeller.

That is a bit worrisome. I would soak it in vinegar for awhile and see if it comes free. My bigger concern is that water would have gotten into the magnet on the impeller causing it to swell and jam. If this has happened you might be able to get away with just replacing the impeller but you need to inspect the motor housing closely.

 

[Smo]

Here is a picture of my Sicce Syncra 5.0 disassembled. There is only one moving part--the impeller and rotor assembly. The magnet is very strong wanting to hold the rotor into the pump body. Don't let it get away from you or you could potentially damage the shafts or bearings.

 

[Crashjack]

Thanks guys!... and a picture is worth 1,000 words. It is now obvious that it is the piece that fits over the front-end of the shaft is what moves (mine is stuck). One more question, the piece that fits over the butt end of the shaft is stuck in its mount inside the impeller housing. Any way to remove it? I would like to clean it too. Also, can you put vinegar in the impeller housing?

 

[Brew12]

Thanks guys!... and a picture is worth 1,000 words. It is now obvious that it is the piece that fits over the front-end of the shaft is what moves (mine is stuck). One more question, the piece that fits over the butt end of the shaft is stuck in its mount inside the impeller housing. Any way to remove it? I would like to clean it too. Also, can you put vinegar in the impeller housing?

Just to be clear, this entire piece rotates. The light gray piece is the magnet that is the motor rotor.

And yes, nothing wrong with letting it soak in vinegar.

 

[Crashjack]

Yes. Some impellers allow the motor rotor to turn on the shaft with the shaft snugged into each end-piece holding the shaft. These apparently have motor rotors that are fixed to the shaft, with the shaft turning inside each end-piece.

I soaked the end of the shaft/end-piece in distilled vinegar for about an hour. Before soaking, I couldn't budge that piece. After soaking, the piece slid up and down the shaft under its own weight, and that occurred in the soak without me applying any pressure... mystery solved.

 

[Smo]

Yes. Some impellers allow the motor rotor to turn on the shaft with the shaft snugged into each end-piece holding the shaft. These apparently have motor rotors that are fixed to the shaft, with the shaft turning inside each end-piece.

I soaked the end of the shaft/end-piece in distilled vinegar for about an hour. Before soaking, I couldn't budge that piece. After soaking, the piece slid up and down the shaft under its own weight, and that occurred in the soak without me applying any pressure... mystery solved.

Correct, if it's like mine it's a solid piece. Sicce offers a kit that includes the rotor and both bearings as a matched set.