Doesn't mix in the bottom of mixer

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

check the brushes

Presuming all looks OK near pivot & lock mechinism? can you see the locking hook in rear of mixer head at the hinge area directly behind lock lever, and is it nested in the slot on the base, or is it jamming up outside the stand and scratching it up?
There is a flat-head height adjust screw to control clearance between spatula and bottom of bowl visible from head-back position- leave it alone. There is a headless set screw visible when mixer is upside down to hold the pivot pin secure. This must be loostened with long-shaft flat screwdriver to remove the pivot pin for head removal if necessary ---avoid removing the pin if possible.

Is the hinge stuck with film of sticky sugar, milk-glue residue, ot the like? That is most common cause, distant second is the lock mechinism alignment (very rare)

Its important to keep head from wobbling side-to-side in use, so dont file or sand anything
Can telephone 609 213 2222 if necessary no charge for my talk.

the motor brushes are worn out and the bushes are worn allowing it to "pole "out
the fix is a replacement unit

Turn the mixer over and look up where the pin goes through the two pieces. There is a screw there which secures the pin. Tap the pin into position and tighten the screw.

It is going to low down. the adjustment should at the back of the unit.

no there is no adjustment . worn hinge on the base , no parts made , not that i have ever seen ...... sorry i wish i had better news

The bowl holds 20 quarts--are you overloading the mix?This mixer is not made for medium/heavy pizza dough.Depending on the pounds of dough,water and other ingredients will affect the mixer in some way.

This sounds like an issue of beater to bowl adjustment, which can come out of alignment naturally over time and with use of the machine.

If the flat beater is striking the bottom of your bowl, this may cause the locking mechanism to loosen and may cause the mixing head to "bounce" during use.

Your Use and Care Guide will cover the "beater to bowl adjustment," which you can do at home in a few minutes with a flathead screwdriver.

You need to raise the bowl just a little less than the thickness of the layer presently being left behind. Too much and the beaters will touch the bowl .