I just installed a set of deore hollowtech cranks and BB.
When installed, I find the crank arms don't spin around really well (with chain off). The old octalink crankarms would spin forever when giving it light push. But the hollowtech arms seem to spin a couple of revolutions and then stop.
I tried loosening the special cap slightly, to reduce the preload tension on the bearings. It didn't make much difference.
Are they supposed to be like this? I have looked through a heap of YouTube vids, but no one seems to give the crank arms a spin at the end of the install. Bugger.