i can't find the crank but i've found where to use it......

Have you located a bridge with waterfalls on either side?

If you have and you look down, you can see passageways extending off the sides. Jump down (you might wish to save your game in case you don't make it into the passageway). There you will find a place to use the crank.

Wyv

Where do I use the bridge crank found in upper level of eastern part of bronze dragon cave? Should I have found more than one dragon shard at this point?