Shimano battery in frame 504w stuck and won’t release!

farKENoath

New Member
Sep 17, 2023
1
1
Adelaide
Sweet, gotcha, Thanks. Now I’ve got to get Canyon or someone to send me that Shimano lock mechanism. (Even if I have to pay for it). I’m going to comb over all the manuals looking for directions on using that key, if I can’t find any I think I have a good argument that Canyon should send a free replacement? Thoughts?
I managed to remove my battery with the fork method. I then took out the upper mount plate and removed the lock mechanism as it was FBAR. Now I can insert a small flathead screw driver to depress the latch and release the battery. See pic below. Pain in the ass getting the battery out the first time. Replacement upper mount in $120 AUD and is currently out of stock. Trusty screw driver will have to do for now.

Screenshot_20230917_185509_Gallery.jpg
 

Cranker

Member
May 29, 2020
8
7
Australia
my BM-e8031 broke as well, the allen bolt would rotate all around and would not release the battery. this how i sorted that. i hope it will help future "victims" of this wonderful shimano engineering trap. i have unscrewed the battery cover / protector and start sliding flat objects between the battery and the upper moun unit to compress the latch. i have used a sharp pry to pry away the flat metal spring on the battery to create a narrow hole so the object could fit in. problem was all of them have been hitting the flat part of the latch.

View attachment 70087

additionaly the blades would start twisting and bending upon pressure, i figured out i need something very firm with a bend at the end so that i would hit the sloping part of the latch and compress it. This IKEA fork have done the job sumpremely:
View attachment 70088

after the battery released i unscrewed the BM-e8031 upper mount releasing mechanism to find that the protrusion on the excentric part screwed on the allen bolt got broken. i have drilled and cut an M3 thread and put a bolt, whose head, although lower than the original protrusion, releases the the latch / battery when turing 1/4. untill i get a replacement part i have to be carefull not to overturn which would displace the spring, but i have a working solution before i get the replacement part:

View attachment 70090
You're a legend mate! Will give your instructions a go later. I gave up yesterday after having now luck trying to get my battery out!!!
 

Cranker

Member
May 29, 2020
8
7
Australia
I managed to get the battery out using the spoon trick!! Cheers everyone that posted the solutions.
Discovered a missing grub srew was the problem. Will have to use some loctite with the new screw!!!

BATTERY TOP MOUNT.jpg
 

Hyronimus

New Member
Nov 24, 2024
1
0
Netherlands
Mine broke today after months of disfuntion. What a crap system :(
Thanks all for the great information.
I found this video, this might help when the battery is still in the frame as with me.

 

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