Transmission Case Gasket

This was my husband's first time to taking apart any mixer - much less a heavy duty KitchenAid. Since we could not find a local repairman, the only thing to do was try to repair it himself. Using your exploded view of the machine he found on the internet, he ordered a gasket which he felt would be needed to repair the mixer. When he tore the machine down, the problem was what he had suspected - original grease had liquified and the rest had turned black in color. He went to a local auto parts store and bought a can of wheel bearing grease. He cleaned out the old oil and repacked with about a half pound of the new grease. The most difficult part of the repair was inserting the roll pin to attach the ring gear housing to the output shaft. It was impossible for him to reinsert the original pin, so he bought a new tension pin with which he was able to work. The only part he has been unable to align is the lever to lock/unlock the machine. He managed to set it enough that it locks when the lever is pushed halfway. The machine works great but I would not advise a person without any mechanical ability to try to repair these mixers.

This mixer was given to me 8-10 yrs ago with only 2 speeds (cant believe i waited this long to fix it). Repair went good, wasn't sure what i should replace so i replaced Control board, control plate, governor, grease in the gears and the transmission gasket. I first took any and ALL measurements for any screws on the control plate, this will help when you set your mixer speeds when its all back together. When installing the new governor i used a 10mm socket and a mallet to seat it all the way till it stops on the set pin. installed the new control board, with thermal grease on the back of the plate(very important). Didn't need to replace the grease in the gears, but i figured since i was in there id replace it. (No smells and all gears work) I used it to ground 5lbs of elk into burger (speed 4) after repairs and it worked great. Still have about 15lbs left to do and itll do it with out braking a sweat. Maybe i should open up a repair shop to fix these suckers...lol its that easy. What really helped with the repairs is the youtube video from Partselect. Second to none with a step by step on how to replace and repair just about anything on your mixer. Good deal, if i need to replace anything else i know where to go! Thanks

Once I looked at the schematic I was prtty sure what the problem was and what I needed to repair the problem. It was reltively easy to disassemble the mixer and immediately saw that I was correct in what was needed. I ordered the parts. They came through with no delay. It took almost as long to find all of the parts as it was to do the repair. In all it took about a half hour to repair, put it together and clean everything up. It works just like new.

I rip everything apart and put new and grease it. works like a new one.

I disassembled the mixer using a YouTube video as a guide. Disassembly was easy, as everything was held together with pins and threaded fasteners, and all electrical connections were plug-on.

Cleaning out the old grease was messy and time-consuming. I used a putty knife, screwdrivers (used them like small putty knives in the crevasses), paper towels, and finally, small cloths dampened with alcohol. After about a hour (maybe 90 minutes) everything actually looked like new.

I originally diagnosed the problem as the plastic gear loosening up from it's hub, so I ordered the complete gear tower assembly. It turned out not to be the problem- the gears were fine. With the gears removed to eliminate load, I applied power and saw that the original symptom was still there.

Further research turned up that this symptom is more likely a failed field coil, or possibly the phase control board. I ordered both from PartSelect. In the meantime, I tested the armature by measuring the resistance across the brushes as I slowly turned it by hand. At every angle, the resistance was about 7.5 ohms. Nothing lower, and no opens, so I'm pretty sure the armature is OK.

The phase control board arrived, but as of this writing, the field coil has been back ordered for almost a month. While I waited, I tried a partial reassembly of the head with the new board, and it worked! This weekend, I'll finish reassembly of the motor unit to the base/gearbox and calibrate the speed governor. In addition to the new gear tower and phase control board, it has new grease, seals, and both side levers (tilt and speed control) that had lost their knobs some time ago.

Hopefully it will be ready for another quarter century of use!

Removed old gear and grease and replaced gear and grease resembled

Looked at the mixer schematic form your website,which made it easy for me to take it apart. Once it was apart & all the grease removed I disassembled & cleaned all the drive parts. Saw what was warn, ordered the parts from you. Three days later received the parts, everything fit perfect. Added grease,assembled the mixer and it ran perfect, good for another 20 yrs. Thank you for making it so easy to repair an old mixer in just over two hours. Rolf

i disassembled the mixer until i could remove the worm gear; is in a housing that that includes another gear and shaft. make sure you have a magnetic tray to put parts in as you work or you will spend more time looking for parts than reassembling the mixer. once you have the gear housing out you will need a small diameter punch to drive out the pin that holds the gears in the housing(i used a 5/32 transfer punch.) make sure you punch the pin out where it will be caught or you will need to order that part because you will not find it. after knocking the pin out it is just a matter of removing the old gear, putting the new one in, and reversing the steps and getting everything reassembled.

I did some research and evaluated a modern day Kitchen Aid Mixer. Looked a the wire diagram and found out what items I needed. Ordered them from Partselect. Overall Mixer is updated and running. I made up some cookie dough with it. The Project took a few evenings due to rewiring the coils on the motor/armature and modifying the rear bearing bracket to hold the Phase control board (not OEM on 70's mixers). Then put it back together and adjusted the speed control.

watched how to repair