bafang clutch

[esuark]

For those who wonder what`s inside the Bafang hub motor clutch. I have just replaced my misbehaving clutch and although having seen a similar photos on the Webb I thought I`d share mine. Couldn't resist opening it up. I had all the same problems as another member https://www.pedelecs.co.uk/forum/threads/strange-pas-problem.37381/ I tried all the advice given to no avail and decided to change the clutch, now all is working as before. I might add that this clutch has survived 2 years and 6000 miles before it gave trouble. I have heard others have failed much earlier.

 

[davell]

I’m the guy in the other post. It turned out that my clutch was also the issue. I couldn’t source another one the same for my shengyi motor (strange size and number of teeth) so in the end I removed it and soaked it in solvent for a few hours. Re-oiled / greased the relevant bits and it’s still going strong 1000+ miles later. I think the lubrication goes hard with age and stops the internals from moving freely.

 

[Nealh]

My BPM clutch is quite accessible and no riveted plate to remove to gain access to the springs/pins.
My 8fun cst has some 9k miles on it and a part from a bearing change have been faultless.

 

[esuark]

I think you are correct about the lubricant hardening/thickening. Yes and the thought of levering up the center of the plate i`v removed and getting some lubricant in there has occurred to me now I know where all the relevant bits are, or even drilling small holes to lubricate now I have a template. Those rollers do not move much from the position they`r in now. I was lucky SWX02 clutches are easily available, teeth and bearings all fine. If I was desperate I think I could reattach the side with countersunk Allen screws. Just glad its all fixed and can get out of the habit of preparing myself for difficulties if I stop pedaling. ;-)

 

[esuark]

In post #1 I linked another post where I stated that I had changed my controller. This was from lishui to KT I have to say that with the KT set to torque/current control this is so much better than the speed control of the lishui.