A professional who maintains coke oven machinery and auxiliary equipment in working condition. Responsibilities include:

• Examines or listens to equipment, such as pushers, charging larrys, door removers, coke guides, and mud-handling equipment to detect faulty operation, or worn or damaged parts.
• Dismantles units and adjusts or replaces defective parts, using bars, airhammers, sledges, chisels, and wrenches.
• Notifies maintenance-mechanic supervisor of major repairs required, such as replacement of defective bearings or gears and shafts.