Magic Pie 3 Out of Commission..Need Help!

I'd crack 'er open & see if there's any chaos inside, a pretty easy task but be cautioned - there's some "advice" out there that may lead you astray in trying to do just that.

There's a buncha lil hex heads around the outside the hub cover, obv those need out (just the wired side) & they're no problem, where it gets tough is the case is sealed pretty well. The "advice" I warned of is some recommend "banging on the axle & it'll come right off"... except ofc that'll bugger the bearing pretty good & likely rip more wires while you're at it. I just took a bit of angle steel, drilled three holes (one for the axle, two for disc brake rotor mount bolts) & made my own pulley puller, or in this instance "case cracker" lol, worked a treat.

Pics 1 & 2 below are the bearing & wires that are right under the cover, the bearing has a retaining clip - but that doesn't mean it wouldn't be stuck a bit as it's pressed into a recess in the cover when assembled. As a BTW, the sides of the shaft keyway are usually razor sharp, dulling those over a bit while you're in there will help keep the wiring comfy (pic, red arrows);



Inside you'll find ...something close to but maybe not quite like this (sorry, but I've the older MP2), point being it's actually pretty straightforward to resolder the connections & splice in new wiring as I had to do when I first got mine. As you can see the MPs used to suffer horrid quality soldering & inferior plugs, something that's improved with the later models like yours - but the procedure is the same;



If you've no board damage (that's unlikely, prolly all wire/keyway damage) it shouldn't be a difficult repair - also, I dunno if you're aware but the MPs internal controller emits beeps as error messages. After a hard reset (unplug power supply, wait a mo & plug back in) silence is golden, but if you get beeping (it's kinda quiet) there's a problem. Again, I'm unfamiliar with the MP3 & 4 but w/mine it's three beeps = throttle position sensor fault, etc. Very handy that.

No worries & yarp - there's no need to pull both covers, the sprocket side has a whole lot of nuffin' under it to bother with, the disc brake/wired side is where all the groovy stuff is at. You can pull both covers if you wish but be aware it's a little troublesome getting it back together if you do, the magnetic fields of the rotor & stator will fight you, I'd imagine a bit like trying to stuff a coupla POed cats back into a bag lol

BarelyAWake said:

I'd crack 'er open & see if there's any chaos inside, a pretty easy task but be cautioned - there's some "advice" out there that may lead you astray in trying to do just that. .....




........ also, I dunno if you're aware but the MPs internal controller emits beeps as error messages. After a hard reset (unplug power supply, wait a mo & plug back in) silence is golden, but if you get beeping (it's kinda quiet) there's a problem. Again, I'm unfamiliar with the MP3 & 4 but w/mine it's three beeps = throttle position sensor fault, etc. Very handy that.

Click to expand...

Wow! BarelyAWake!

Now that's what I call a response!

Good info plus good photos.

There's no telling yet if that has solved all of the OPs troubles. But you sure gave him something to work with.

If I could give folks help like that, then I'd call myself a "member" or a "contributor".

Nice job. I'm a-gonna have to try to do some imitatin'.

Thankee, it's really mostly rememberin' the pics... which I fail to do sometimes lol (any apostrophe abuse at your discretion)

...from the pics it looks OK, but ofc it's hard to tell. Once the cover releases it's seal (the stage you're at) it shouldn't be a problem - you might be hanging on wires wedged in the keyway, it's really snug in there. Unbolt your puller & get it outa the way (yer done w/it) & give it a (very) lil lube in where the wires enter & the axle shaft (even a mild water/soap mix will work), wiggle gently & see if that gets you any play... I s'pose it's possible the bearings stuck in the case cover but that's less likely.

There really isn't anything else, 'cept patience is key

Did you smell smoke when the wires were wound up before and yanked from the ESC? I'm wondering if it may have shorted before finishing the deed.

is the wheel hard to turn by hand when power on? i know you put a new controller on but it could bad. the wheel should turn freely