MCE600 pump assembly issue | The Aquarium Solution

MCE600 pump assembly issue

Question:

Hi,

I recently purchased a new impeller for my skimmer as the previous one had worn away with time. Upon installing the new impeller I now have a lot of movement (slop) in the shaft and also the provided shaft is too long for the body of the unit. The only way I can screw shut the body is by taking off the bung at the end of the shaft. Could you please advise what steps are required to return this unit to fully working order.

Regards

David

Answer:

Hi David

The shafts are produced at a set size so an over sized shaft would be highly unusual.

Is there a chance that you could send me a few pictures of both old and new impellers and pump

please.

Have you sized both old and new shafts up side by side?

If the shaft isn't located into the bottom grommet it will be allowed to move as the grommet holds the shaft in place,

the shaft will also sit too high at the end plate as it wont be pushed down into the grommet.

This may be the cause of the slop. Please ensure that the bottom grommet hasn't twisted as you wont be able to

push the shaft down if it has,lubricate the grommet with a little Vaseline and re-install if it doesn't sit correctly inside

its housing.

Remove the impeller and view the grommet. If it is sitting correctly install the shaft so it enters the grommet and pushes

into it.

Now carefully install the impeller onto the shaft , the end suction plate can now be installed whilst ensuring that

the grommet inside the plate is sitting correctly and pushes onto the end of the impeller shaft.With the suction

plate installed you can tighten the bayonet ring.

The above takes into account that you are using the old style pump with separate impeller shaft and not the new style pump

as the impeller incorporates a fixed shaft.

I have included a couple of links that will hopefully help you install the impeller and identify that you have an old or new

style pump.

http://www.theaquariumsolution.com/aquabee-pump-impeller-and-grommet-installation

http://www.theaquariumsolution.com/maintaining-mc-and-ap-skimmers-aquabee-pump

http://www.theaquariumsolution.com/old-or-new-style-pumps-%E2%80%93-which-one-have-you-got

Hope this helps Tony