Mixing blade on KSM50PPWH model will not release? Any ideas?

Owner's manual troubleshooting? No manual, try MFG customer website or phone. They may like to know you are having problems. They may know this is a problem and may send you a replacement free.

what sort of mixer is it? If it is a small hand help are the mixing blades fully inserted up to the little bumps on the side of the rods of the mixer blades where they attach to mixer. If a larger mixer like a kenwood, agin make sure the blade / s are properly inserted.

Can you tell me the exact type you have and say exactly what you did to it to change it?

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

The BUSH on the spindle is worn out. You will notice that liquid blending might make the liquid to flow out through this . If so it is confirmed. This is usual as the food particles gets caught on and wear off the bush in due time.
the blade unit has to be taken out and the bush must be changed after choosing the right bush for the steel spindle.
You can confirm rotating the spindle and see if this shakes.
Hope this tip confirms the fault.

just open it up and lubricate the motor

splash a little water where it comes apart. Water will lube and soften anything holding the attachment. make sure it's unplugged so you don't lose a finger or twoOr pour a few drops of cooking oil on the button and let it run down the sides into the mechabism. good luck

I have been in touch with a local electrical store who is getting the parts required.
Thanks

Neil

http://www.fixya.com/support/t636606-kitchenaid_ksm90_stand_mixer