Dome and blade assembly for kitcenaid ksb5bu blender

That looks like a blender model number, not a mixer. The Kitchen Aid web site does not recognise it. Maybe a photo of the appliance and state what part you want for it may help.

It is unwise to put whole ice cubes in the plastic processor vessel. If you have the pyrex glass attachment, Ice is fine.

I'd google to see if I could find one that looks like yours. You could also search Ebay, you may find the same unit and therefore know where to find instructions. Check your library, Research librarian may be able to help find Owner's manual. Then look for instructions. Last check with a County farm agent's office, they may recommend sources.

Did you ever find a replacement blade for your Maxi-4000? Thanks!

replacement can be found on amazon, take a look here: Amazon com Vitamix blade assembly. I hope this was helpful. Cheers

Is the blade in the working bowl free turning?

I have had my Bosch Universal Mixer with the Blender and Food Processor Attachments since 2005, and I've loved it since the day I got it... that is, until the blender broke while my son was crushing ice to make slushies...

I figured out the "drive coupler" was stripped and needed replacing, but I couldn't figure out how to take apart the "blade assembly" which includes the "drive coupler" part...

My retailer, Pleasant Hill Grain, sent me the following email:

"I am not aware of any printed instructions for removing the old coupling and
replacing with the new. We recommend holding on to the blades with 1 hand and a
towel and using a needle nose pliers to unscrew the old coupling. You would put
the new coupling on in the same manner.
If these instructions do not work, I would suggest contacting the Service
Dept at Kitchen Resources in Utah. Their phone is 800-692-6724."

I still couldn't figure out how to take apart the blade assembly, so I did end up calling the distributor, Kitchen Resources...

Dave, the tech @ Kitchen Resources, answered my call on the first ring...

Once I explained my problem, he started giving me the same instructions Pleasant Hill Grain gave
me... I explained to him that holding the blades tightly wasn't working for me.

As it turned out, holding the blades did not secure the drive shaft because
the drive shaft was broken off INSIDE the blade assembly - which is why I could
not unscrew the old drive coupling part.

Dave's next question revealed the true issue at hand... my Blender Attachment has the blade assembly made of plastic - they switched to plastic
in 2005 because the metal assembly turned black in dishwashers.

Bosch just recently went back to using metal for this part - apparently the
plastic blade assembly didn't hold up.

Kitchen Resources - the U.S. Bosch Distributor - is sending me a new blade
assembly - no charge, he said it's covered under warranty. Woo Hoo!

Best of all, I hadn't yet purchased the replacement drive coupling part, because
I wanted to know how to go about replacing the part before ordering a new part.

With shipping this part would have been a $50+ repair - you have to love
customer service of that caliber!

[Aside: You really don't need to ever put this part in the dishwasher - wash
the inside with by putting hot water and perhaps a little dish detergent inside
the blender and turning it on - rinse the outside under the sink... no
dishwasher needed! ]

It seems you can no longer buy the MegaMixa HA-3058 however Bamix sell a similar product - in fact apart from a couple of aesthetic modifications it seems to be the same machine....

They sell many accessories and you can get blades. Check:
www.bamix.com
www.bamix-blender.co.uk

I have both machines and the blades are identical and inter-changeable between models.

if this is new then i would just take it back it may be faulty.