Problem with Cyclotricity conversion kit - Pedal Assist

Uatas

Just Joined
Oct 16, 2014
3
0
50
Hello

first post, so be gentle with me! I had a look through the forum posts to date and have a vague idea what could be the problem but wanted to get some tips.

I have a Ridgeback bike which was converted to an e-bike using a Cyclotricity battery/e-kit with the LCD display/pedal assist. I had this fitted in January, so not entirely sure about the model number for the kit.

Over the last couple of days the pedal assist has stopped working. The throttle still works, so it's not a battery problem. The LCD display has stopped indicating the speed and kilometres, but still turns on. Occasionally the pedal assist gently kicks in, but then gives up again.

From reading the owners manual and forum posts, it sounds like this could be a problem with the PAS sensor/magnet getting dislocated - we have quite bumpy bike paths around here. Does this sound feasible? And is it something I could easily fix myself (not a big bike repair specialist), or am I better off taking it to a specialist bike garage?

Many thanks!
 

trex

Esteemed Pedelecer
May 15, 2011
7,703
2,669
you can probably fix it yourself. Check in order: 1) that the magnet disc is not jammed and rotates with the cranks. 2) that the sensor head is less than 2mm away from the magnets. 3) that the cable between the sensor and controller is intact. 4) that the connector inside the controller box is not loose.
 

Uatas

Just Joined
Oct 16, 2014
3
0
50
Hello, many thanks for the suggestions. I found the magnetic disc (yay!) and it seems to be jammed/only occasionally turning with the cranks. Is there an easy way to de-jam it or do I have to take apart the whole pedal/crank setup? Also, some of the hardware of the chain guard seems to be pressing against the sensor/magnet setup so I tried to remove that, but can't get rid of all of it without taking off the pedal...
 

trex

Esteemed Pedelecer
May 15, 2011
7,703
2,669
the magnet disc can jam if you do not have enough space for it on the bottom bracket. If this is the case, change the bottom bracket for one with longer spindle.
Post a picture, we'll see the problem better.
 

Uatas

Just Joined
Oct 16, 2014
3
0
50
Hi again - I managed to find a local bike mechanic who is willing to have a look at the problem. I hope your pointers will help him fix the PAS disk. Many thanks again.
 

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