problems with a 6045

[mfinn]

I cleaned up my 6045 pump yesterday, Removed just coraline and algea that was blocking the slits on top of the cover.
After plugging the cleaned pump back in, it clicked for a second or two, then started running like normal. But a 1/2 a minute later it started clicking and I looked at it and the prop and impeller looked as if it were trying to jump out.
I tried unplugging it several times and sometimes it will work for a minute, then it will start over again.
Is there a fix for this?

 

[psykokid]

take the impeller out and make sure that everything is cleaned, if you have heavy enough coraline deposits to clog the inlet slits then you definitely need to disassemble and clean the whole thing.

here's a link to the manual : http://www.tunze.com/fileadmin/gebrauchsanleitungen/x6025.8888.pdf

page 23 is where they talk about servicing and illustrations are on page 22. Make sure the center of the impeller, the impeller shaft, impeller well and the lower bushing that lives between the impeller and the motor block are all nice and clean. Id recommend that you do a full tear down every 6 months min if you have heavy enough coraline growth to block the inlet slits. Reason being that if the calcium builds up it can cause unnecessary wear.

 

[mfinn]

Everything is nice and clean. I do take the 6045 and the 2 6055's out every 5-6 months and clean them throughly.

It was working perfectly before I cleaned it.

I'm wondering if this tiny bit of damage on the motor block side of the impeller magnet has anything to do with it trying to jump out. (For lack of a better description)

 

[psykokid]

could be, it would allow some slop in the end where it makes contact with the impeller shaft.

 

[rvitko]

The drive unit is broken, it should have a plastic piece at the base. The way it is now the propeller can move independently of the magnet, it is not really attached, you could pull the prop and shaft right off the magnet.

 

[rvitko]

You need a new disk 6025.740 and drive unit 6025.700.

 

[mfinn]

The drive unit is broken, it should have a plastic piece at the base. The way it is now the propeller can move independently of the magnet, it is not really attached, you could pull the prop and shaft right off the magnet.

So these two pieces are suppose to be attached?

 

[rvitko]

Yes, that is all injection molded as one piece around the magnet. On the old pumps sand would stick in the disk and act like a cutting wheel and saw through, the new disk and drive are a new plastic that is harder.

 

[mfinn]

You need a new disk 6025.740 and drive unit 6025.700.

Thank-you.
I will get those 2 parts ordered asap

 

[mfinn]

So these parts replace the parts in the 7th post (above)

 

[rvitko]

The disk goes under the drive unit, it stays in the pump on the shaft but you will have an older white one or maybe a stainless steel one. If you have the stainless steel one, remove it, it will just fall out, otherwise just place the disk on the shaft and use the drive unit to seat it all the way at the bottom.

 

[mfinn]

Thank-you for your help.
Pump is back in the tank working perfectly.

 

[mfinn]

Well the pump was working, until tonight.
It wasn't working so I took it apart and it looks as if the shaft broke away from the motor.

 

[rvitko]

This would be a fairly old pump, for the first 6 months or so of production we used a Chinese made stainless steel shaft, we then switched to German made 316TI and have not had broken shafts since. I want to make it clear that the pumps have always been made in Germany but magnets come from one of two sources (Siberia or China) simply because these are the sources of the raw material and magnet production would be practically regulated out of existence by OSHA and similar regs in Europe, it is dirty, hazardous work. We sourced the shaft from the same supplier of the propeller magnet for simplicity early on. Send in the pump and we will replace it. I don't need the magnet holder and clamp, but the motor and likely the front cover have to be replaced as the way theses parts fit has changed.

 

[mfinn]

The shaft seems to be jammed into the impeller/magnet assembly.
Can I pull the prop and magnet apart?

 

[rvitko]

The plastic shaft the prop sits on is permanently molded to the magnet, you can pull the prop off this plastic shaft. If the metal shaft is stuck inside it is likely from fine sand or some debris binding the two pieces.