Some Husqvarna cranks have a hole drilled in the crankshaft through that dimple and an intersecting hole drilled through the side of the shaft to connect to the central one that allows the clutch needle bearing to be greased from the exterior.
You have to ascertain if the hole is A: there (is not in all saws), B: there is a side hole at the bearing position and C: if indeed that hole continues into the crankcase (as some 3120's do)
There is a service bulletin around somewhere from Husqvarna that explains how this must be plugged (if right through to interior of case) to perform a pressure/vacuum test.