I have used an old headset spanner behind the crank arm and a bearing puller. I have removed lots of power torque cranks without damage.
All sorted, sorry for the radio silence. How did you pull them without the plug thing you put into where the crank bolt goes?
We had a couple to do and customers so didn't want to bodge things, also needed bearing puller extension to swap bearings
@wynne started
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I have used an old headset spanner behind the crank arm and a bearing puller. I have removed lots of power torque cranks without damage.