Not knowing how handy you are I would try to take the top of the mixer apart and see what is going on. It sounds like one of your gears is either slipping or has some broken teeth. If you don't want to tackle it a small appliance repair shop should be able to fix it for you.
I just found this
Maintenance Service
Your Sunbeam Caf? Series
®
Planetary
Mixmaster
®
Power Drive should be regularly
checked. After approximately four years
of domestic use, the grease in the gear
compartment should be examined. We
suggest at that time you send the mixer to
your nearest Sunbeam Appliance Service
Centre to ensure efficient, correct servicing.
Just there recommendation but i guess a known problem.
SOURCE: 2359, 2360 sunbeam mixmaster
It is the worm gears attached to the front of the motor in the housing I had the same problem on the heritage series. The parts are plastic so inevtiably they wear out.
SOURCE: Sunbeam Mixmaster Heritage Series Model 2350 speed problem
The speed control on the back is simply a variable resistance potentiometer, the same thing that controls the volume on older amplifiers. The output current to the motor is supplied by the printed circuit board in the bottom of the unit. This allows gradual increases in speed to avoid over-torquing the motor on speedup. Even the poshy-posh-posh mixers do this.
At least it still works. The most common problem is the cheap plastic drive gears that strip out with a mild cookie dough, this jams the beaters together and requires burial-at-dumpster.
SOURCE: My sunbeam mixmasters turntable is not turning
Hi Jill. Your mixer's gears are made of plastic and can't really handle heavy loads such as cookie and bread doughs. Contact Sunbeam Corp. to locate a parts place near you. You'll need to replace at least the large gear that turns the turntable base, possibly the worm gear that turns the large gear too. Grease these gears when you re-install the parts. You'll have to cut a couple of cable ties to get the machine apart enough to do the work. If this solution has assisted you, please rate it. Good luck! ricardok45.
SOURCE: After dough hooks for my sunbeam mixmaster model no. mx-ac
Use this link. I'd been looking for years and I found them here. http://buyitnow64.stores.yahoo.net/sustmidoho.html
SOURCE: Sunbeam Mixmaster model 9 speed control problem
OK, this may not be a solution, but might help you get there.
The speed control is NOT a potentiometer, it is a mechanical governer, and may be out of adjustment, or one of two components in the speed control mechanism has failed. The following is a test/ adjustment procedure.
During this procedure you will not be fiddling with electrical components (No risk of shock) You will be making adjustments with the motor running.
In the centre of the speed finder dial is a chrome cap. This can be *carefully* pried out. Be gentle, it's easy to chip the phenolic resin plastic.
Behind this cap is a nut around a threaded part with a screwdriver slot. Using a spanner and screwdriver to stop the centre part turning, loosen the nut some.
Turn the speed finder dial to 1. Plug the motor in and switch on. Whilst restraining the outer nut with a spanner, turn the central screw. From memory, it needs to be turned clockwise, that is, screwed inwards. The motor should respond by slowing down. Should you get no speed change, try turning the screw the other way some.
If you get a speed change, continue turning the screw in that direction until the motor stops. Now screw the other way until the motor just starts again.
This is the lowest speed and corresponds to 1 on the dial. Check the speed finder dial is still pointing to the 1 position. Lock the adjustment screw by restraining the central part, and turning the nut clockwise with the spanner until tight. Try turning the dial to see that the speed changes smoothly throughout the range. You may need to tweak the adjustment a little to get things just right.
Once you're happy with the speed control refit the chrome button, and you're done.
If you could get no speed change, one of two components under the speed finder dial has indeed failed.
Now you will need to determine just what the machine is worth to you. A motor specialist should be able to diagnose which part has failed. However, new parts will not physically fit and modifications will be needed. This could prove costly. If you know an inveterate tinkerer, you're costs could be substantially lowered.
Best of Luck.
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