Disassembly of the Aventon Aventure motor

[Alec Crock]

Hi everyone, I'm not new to repairing e-bike motors, but now I'm faced with an unusual Aventon Aventure motor design. I'm not really sure how to properly disassemble this motor to replace the Hall sensor. As you can see in the photo, there is a nut in the end of the motor axis, which, it seems to me, needs to be unscrewed. I've tried to do this with a regular wrench, but I haven't been successful. Perhaps a special tool is needed here. Is there anyone who has experience disassembling such motors? I would appreciate some advice in this situation. Thanks!

 

[Marcela]

left or right hand thread?

 

[Alec Crock]

left or right hand thread?

right

 

[Marcela]

Maybe there is a tool to hold the outer hub and the collar and axle unscrew as a unit?

 

[PCeBiker]

That sure looks like a spacer/collar that threads onto the axle?

I've got something very similar on my old-school axle,..

Try unthreading with an open ended wrench on the axle flats and another wrench on the threaded spacer/nut.

It looks like you have clearance to reach in there to grab the flats of the collar/spacer ?
An adjustable pliers might be enough to grab the flats of the collar?


That nut is probably used to adjust the preload on the bearing so you'll want to reassemble your motor with that in mind.

My axle has a locking nut to keep the collar/spacer/bearing race from moving after the preload is set.

 

[PCeBiker]

,..there is a nut in the end of the motor axis, which, it seems to me, needs to be unscrewed. I've tried to do this with a regular wrench, but I haven't been successful.

It's probably a little seized or the axle threads are dirty or slightly damaged?

The collar/nut probably gets pinched in dropout when you tighten the axle nuts, and that can cause the threads to bind up a bit.


EDIT: Your nut probably presses against the inner race of a sealed bearing on the other end of the nut, and the inner race would be supported along the entire axle, so the nut can lock onto the inner bearing race without binding the bearing.

My axle if for loose ball bearings, so if it's over tightened, it will bind the bearings.


If it were me, I'd reach in there with a vise-grips if I had to. It shouldn't matter if you damage the outer surface of the nut, as long as the face stays undamaged.

An old-school pedal wrench might fit that nut?

I bet that nut is 15mm?
It's kind of a standard, and they probably used 15mm so a pedal wrench will fit?

That nut might be seized up pretty good?

 

[Alec Crock]

It's probably a little seized or the axle threads are dirty or slightly damaged?

The collar/nut probably gets pinched in dropout when you tighten the axle nuts, and that can cause the threads to bind up a bit.


EDIT: Your nut probably presses against the inner race of a sealed bearing on the other end of the nut, and the inner race would be supported along the entire axle, so the nut can lock onto the inner bearing race without binding the bearing.

My axle if for loose ball bearings, so if it's over tightened, it will bind the bearings.


If it were me, I'd reach in there with a vise-grips if I had to. It shouldn't matter if you damage the outer surface of the nut, as long as the face stays undamaged.

An old-school pedal wrench might fit that nut?


View attachment 188142View attachment 188143


I bet that nut is 15mm?
It's kind of a standard, and they probably used 15mm so a pedal wrench will fit?

That nut might be seized up pretty good?

Hello, thanks for the tips, your photo with a similar nut sheds light on this situation. Tomorrow I will try to make another attempt to unscrew it and I will tell you what happened. P.S. nut on 17