Convection fan hums but doesn't turn.

Total pain in the butt... i ordered a jy58 motor.. 220v unit.. and will attempt to merge the 2 motors together to make 1 working unit. The 'clips' are not able to be attached.. so im going to transplant them from a 220v motor to the original 110v windings. https://www.amazon.com/dp/B0987TMX53

and the verdict is... yes, it can be done... and yes, the frankenstein motor works.. with a few notes:

.25) Be EXTREMELY careful. the covers are razor sharp.

.4) Have a torch handy. The screws on the sides of the fan blade hub are frozen solid, torch the hub for 15 seconds to loosen the Allen screw.

.5) take pictures as you disassemble the unit. Better yet, wait to disassemble until donor motor arrives. 1-2 weeks introduces a lot of mistakes when reassembling

.75) The screws holding the endcaps on... wet with acetone before trying to take apart.. otherwise, they will NOT come apart. they used some type of Lock-Tite in the threads that makes it a PITA if you don't soak with solvent.

1) The endcaps/bushing mounts don't fit. you need to (I used a stair step drill-bit) drill to open the magnetic winding core so the endcap alignment protrusion fits, after a minor drilling, they clicked right into place. Stair-step bit will auto center.

2) The center core needs to be swapped between units. The above motor doesn't have the external fan shaft for cooling the control board

3) the core doesn't match the same size. using the spare washers from the donor core, you can space them correctly. If you are still front to rear sloppy on the shaft, ace hardware carries nylon washers that fit. I bought 4 washers, I think I only used 1.. maybe 2. (23 cents apiece)

4) Be slow at disassembly and careful handling the motor core.. my unit is like 8? years old and the insulating plastic is brittle as all heck..

Did I mention to take pictures.. take A LOT of them....

reassembling the endcaps with the original core, don't use the new core's screws.. the motor wont fit if you try. The screws are too long.

The endcaps are NOT universal. Place the endcap with the threaded screw holes on the long shaft side of the motor.

Don't be afraid of sharpie marking panels as you disassemble.

Don't miss-place the spacer washers between the metal plate, insulating pad, insulating plate, and motor (take a lot of pictures)

If you need to step away and scream.. do so.

when the wife says "is it on? It isn't making that grumbling/buzzing noise anymore", smile.

Note: the original motor had a defective design. The new motor endcaps are crimped to not fail in the same way.

Note: if when re-assembling, the cover wont fit (right side).... the fan blades face INWARD.... /facepalm

Same here. This is my second, and there will be no third for me. It's time to move on. There are better companies out there.

The lubricant dried and the motor shaft seized in its bushings. I took it apart, cleaned and re-lubricated. Lasted another 2 years.

the YJ58 is an oven fan rated at 220/110v with the exact same specs! you are welcome people!!!
LONG LIVE THE 800XL!!!

From your efforts, it sounds like the fan was hanging up on that "crud". Just do a good cleaning to totally eliminate that "dull knocking sound". The fan runs fine outside the unit - so it has to be interference making the noise.

That fan doesn't have a starter capacitor on it, does it?

I had the same problem. I completely removed the motor and took out the 2 screws holding the motor together. I found that the bushings were not worn at all, but the oven side bushing was loose. There's ring "clip" holding the busing in place. The clip looks like an inside out flower (pedals facing inward instead of outward). I applied some pressure on opposing pedals with a pair of needle nose pliers to reseat the busing and tighten it up. That removed all play in the shaft. After reassembling everything the noise was gone and the motor no longer stalled.