EE WAS ASSISTING CONTRACT MECHANIC REMOVE CLUTCH HOUSING FROM EL-JAY VSI CRUSHER. MECHANIC WAS HOISTING HOUSING WITH LIFTING STRAP USING TRUCK CRANE. AS HOUSING CAME OUT EE HAD HAND ON LIFTING STRAP & THE HOUSING SHIFTED PINCHING EE'S LEFT HAND BETWEEN STRAP & SHEAVES ON CLUTCH HOUSING. INJURY WAS CONTUSION TO LEFT HAND REQUIRING MODIFIED WORK RESTRICTIONS. NO LOST TIME.