Andrew707 wrote: ↑Aug 21 2020 11:41pmHello,
Today, I've wanted to do heat dissipation improvement on my motor following tutorial on wiki, replace the blue gear, regrease everything and silicone seal the housing for extra waterproofness. Everything went quite well until I had to test it out... And the motor is not working properly. After pedalling harder I noticed that power drops and there's this weird sound coming out of the motor like "wrum wrum" (here's a short video with that sound).
I have 2800km on this motor and this is the first time I opened it up. The blue gear seemed fine but I still decided to replace it with a new one. To regrease everything I've used ParkTool PPL-1 PolyLube 1000.
Here are some pictures of my progress: https://imgur.com/a/gKUjd30
Hello,Andrew707 wrote: ↑Aug 30 2020 7:40pmToday I finally disassembled the roller clutch bearing. It was interesting to see how does it work inside. Also, I found that the rollers were quite greasy. Here are some pictures: https://imgur.com/a/gN1zkfdAndrew707 wrote: ↑Aug 26 2020 5:38pmSo yesterday I soaked blue gear in biodegradable degreaser for a few hours, then used toothbrush trying to clean the inside and then put it under hot water, dried and used isopropyl alcohol to clean inside again and tried it in the motor. Unfortunately, it's still making that sound. I believe grease got inside the bearing and it's not going anywhere now... So I ordered a new brass gear just to try it out. But it may take a couple months to arrive.
Also, I've tried to hammer out roller clutch bearing using a socket but it came out with the outer ring. Still want to disassemble it to see how it looks like inside but I'm running out of ideas what else to do with my limited tools... Here are some pics: https://imgur.com/a/JTCLktT
I soaked in degreaser my other blue gear overnight. Then used a screwdriver which fits perfectly inside to spin the rollers in the degreaser, hot water and isopropyl alcohol. Dried everything up and the rollers were quite loud when spinning them so that means the inside of the bearing probably got cleaned up as well. Put everything together and my motor is still slipping and making that weird sound. I honestly don't know what else to do. Right now I'm seriously considering just buying a new motor again...
Just want to share an update on this.
Few weeks ago I've got that weird sound problem described above. Tried many things and nothing worked. Recently finally received brass gear and put it in without any grease at all (just to test it out for like 100 meters) and the motor made the same sound again and power dropped. So the problem wasn't in the greased gear.
Few days ago I've got a new controller. Before putting it in I once again dissassembled the motor, tried to remove the thermal paste from copper wires (I don't think that was a problem but was still worth a try), then I bent even more the waved spacer and put everything back and tightened the screws as much as I could. And the problem almost went away! Right now it briefly makes that sound when I'm "topping out", e.g. biking very fast when the motor cuts out. So as long as I bike normally then everything is fine.
My guess is that maybe that waved spacer somehow impacted the magnets position and prevented the motor from working properly??
Oh, and at the same time I followed eco cycles tutorial to install the lights which worked out pretty great!
Here are some pics of the work I've done: https://imgur.com/a/koBEnzJ