It's hard to take off the compression cap once you tighten it and the bolt, it sound like the "technician" forget to put the plastic compression cap after putting the crank on, and since he forget that, i would very much wager this is not a workshop to be trusted with something you can learn from reading up the Shimano technical document online.
It's hard to take off the compression cap once you tighten it and the bolt, it sound like the "technician" forget to put the plastic compression cap after putting the crank on, and since he forget that, i would very much wager this is not a workshop to be trusted with something you can learn from reading up the Shimano technical document online.