Elektroroller-Forum.de

I regret many posts in sequence, I am just keen to get my bike going again! It is one thing, and then it is the next.

I will bring it together with this 'bombshell'.

I believe I am going to have to remove and repair the motor.

It is grinding away with what I am sure is either rust, or something dropped off and trapped in the magnet gap somewhere.

It is not a 360 degree scraping/zinging, but at the point where the wheel binds up, I can rotate it back and forwards and I can feel it binding.

It does not feel like it will simply wear down flat.

Something is going on in the motor. It might be connected with the fault I was trying to fix before Christmas, the controller cut out and did not allow high phase current at low speeds.

I think the only way is to remove it and open it.

My interest in attempting this work is 'zero'. I just want to ride my nice bike!

First step is to open it up. It seems this is the method? I am scared of very big magnets that can chop fingers off.

https://youtu.be/VeL0FQom1CE?t=156

The really dangerous part is missing,
the reasambling of the motor.
There you can chop your fingers.

I opened my motor with a big hammer and two crowbars and a lot of different wood and plastic spacers. You could also use an hydraulic press.
For reasambling I also used spacers with differnt heights.

dominik hat geschrieben: ↑

Di 21. Jan 2025, 20:43

The really dangerous part is missing,
the reasambling of the motor.
There you can chop your fingers.

I opened my motor with a big hammer and two crowbars and a lot of different wood and plastic spacers. You could also use an hydraulic press.
For reasambling I also used spacers with differnt heights.

Yes.

I noticed it was the bit missing in the video! It was the important bit.

I will buy studs, or bolts, through which 12 studs will guide the piece on and off, and I will secure the loose plate to the axle, by some means I will decide on once the wheel is off.

I will fit the guide studs, then simply drop it like the video.

Do you have any record of your work I could see?

I will try to keep a good record, and if I come out of it with 10 fingers, I'll post and say how I did it.

I will have to buy some extra components.

I am afraid, I have to do this. It is wrong as it is, I cannot rely on it fixing itself.

bob2.0 hat geschrieben: ↑

Di 21. Jan 2025, 17:41

I believe I am going to have to remove and repair the motor.

I had grinding sound when rear brake hose with protective spring felt off from the holder, I thought it was a losen magnet but luckily it was that simple.

If you do not have visible mechanical problem, I suggest to check controller´s settings. Wrong pole pairs value, PhaseOffset or PIDs can cause very bad sound and wrong behavior of the motor like almost no torque etc.

Check turning rear wheel while controller is on and also when it is OFF to verify possible electrical issue - when controller is off, it can not stop the wheel to turn so wheel should turn normal.

Miguello80 hat geschrieben: ↑

Di 21. Jan 2025, 20:54

bob2.0 hat geschrieben: ↑

Di 21. Jan 2025, 17:41

I believe I am going to have to remove and repair the motor.

I had grinding sound when rear brake hose with protective spring felt off from the holder, I thought it was a losen magnet but luckily it was that simple.

If you do not have visible mechanical problem, I suggest to check controller´s settings. Wrong pole pairs value, PhaseOffset or PIDs can cause very bad sound and wrong behavior of the motor like almost no torque etc.

Check turning rear wheel while controller is on and also when it is OFF to verify possible electrical issue - when controller is off, it can not stop the wheel to turn so wheel should turn normal.

It is the same, controller on or off. It is only at one spot on the turn.

Curious, that there was a 'scraping' sound each revolution last year. Before this 'zingzing'. I assumed was the brake, but now I find, it was not the brake.

So I think it was like this before the immersion in a flooded road. The immersion might have made worse, but I think it was already like this.

I guess that there is rust at the bottom of the motor, where water has formed.

I do not believe it is from my immersion alone because I used it a lot afterwards. But that did not help. Standing over winter has made rust at the bottom worse. This is my guess.

I think the plating on the magnets has failed and is bubbling. I have to dismantle, clean, and then repaint the damage.

I cannot say if this is part of the fault I saw before (cut out at high phase currents for low-speed), I think actually it is something else. But I will keep an open mind.

Nope, only pictures from the opened Motor and the burned phase wires and from getting new wires in, as I was working by myself.
https://www.elektroroller-forum.de/view ... 48#p316448

dominik hat geschrieben: ↑

Di 21. Jan 2025, 21:06

Nope, only pictures from the opened Motor and the burned phase wires and from getting new wires in, as I was working by myself.
https://www.elektroroller-forum.de/view ... 48#p316448

Thank you for the link and photos, at least they give me an insight into what I might find.

Maybe these photos and the description from TwisterMax might help dismantling the motor.
And here.

And DavidSt dismantled his motor too.

jeff-jordan hat geschrieben: ↑

Di 21. Jan 2025, 23:13

Maybe these photos and the description from TwisterMax might help dismantling the motor.
And here.

And DavidSt dismantled his motor too.

Thank you, yes, indeed.

More photos will help me do the job.

I think I will use a hydraulic trolley jack, and strap it all down to a table, both removal and installation of the rotor.

I think I will find rusty parts, but hopefully not too damaged.

Then I might paint the parts to help reduce this further.

I can also check the bearings and windings for any visible damage.

I'm going to consider this to be 'a service'.

Perhaps it is a good thing to do every few years anyway, to make sure long term rust is removed, and damage does not accumulate due to particles causing wear?

I am getting ahead of myself. First things to get the wheel off. Then the repair will not be quick, so I have a spare 17" rim/wheel from a regular bike, I will try to fit that so I can move the bike around.

bob2.0 hat geschrieben: ↑

Mi 22. Jan 2025, 00:44

...
I'm going to consider this to be 'a service'.
...

Yes, new kind of bike, new type of service .

Anyway, I don't know what tires you are riding with your E-Odin.
If you're riding the original feiben stuff , or a worn tire, it might be a good idea to take the chance and replace the rear slipper .