EE WAS REMOVING BOLT ON ARM OF TIPPING VALVE TO RESET. EE POSITIONED HAND TO CATCH BOLT AS IT WAS DRIVEN OUT. HAMMER HIT HANDRIAL CAUSING IT TO DEFLECT & STRIKE HAND. 6 STITCHES TO FINGER. MOT ORS RELAYS REQUIRE RESET TOO OFTEN & ARE AN OLDER TYPE THAT ARE NO LONGER AVAILABLE. MOTORS AND RELAYS WILL BE REPLACED IN MODERNIZATION PROJECT SCHEDULED IN 6 MONTHS.