Speed Control Lever

Pulled the Knob off of the new Lever then pressed it on the old Lever. I had to order the whole lever because it was the part nearest the knob in the illustrated parts break-down. I RECOMMEND THAT THE KNOB BE ADDED TO THE ILLUSTRATED PARTS BREAK-DOWN.

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!

Watched a YouTube video to disassemble,from there went smoothly. One small piece of advice,take pictures with your smart phone during the process. Makes remembering easier.