PERFORM WORK INVOLVING THE SKILLS OF TWO OR MORE MAINTENANCE OR CRAFT OCCUPATIONS TO KEEP MACHINES, MECHANICAL EQUIPMENT, OR THE STRUCTURE OF AN ESTABLISHMENT IN REPAIR. INSPECT, OPERATE, ORTEST MACHINERY OR EQUIPMENT TO DIAGNOSE MACHINE MALUNCTIONS. DISMANTLE ACHINES, EQUIPMENT, OR DEVICES TO ACCESS AND MOVE DEFECTIVE PARTS, USING HOISTS, CRANES, HAND TOOLS, OR POWERTOOLS. PERFORM ROUTINE MAINTENANCE, SUCH AS INSPECTING DRIVES, MOTORS, ORBELTS, CHECKING FLUIDLEVELS, REPLACING FILTERS, OR DOING OTHER PREVENTIVE MAINTENANCE ACTIONS. DIAGNOSE MECHANICAL PROBLEMS AND DETERMINE HOW TO CORRECT THEM, CHECKING BLUEPRINTS, REPAIR MANUALS, OR PARTS CATALOGS, AS NECESSARY. REPAIR MACHINES, EQUIPMENT, OR STRUCTURES, USING TOOLS SUCH AS HAMMERS, HOISTS, SAWS, DRILLS, WRENCHES, OREQUIPMENT SUCH AS PRECISION MEASURING INSTRUMENTS OR ELECTRICAL OR ELECTRONIC TESTING DEVICES. MAINTAINOR REPAIR SPECIALIZED EQUIPMENT. ASSEMBLE, INSTALL, OR REPAIR WIRING, ELECTRICAL OR ELECTRONIC COMPONENTS, PIPESYSTEMS, PLUMBING, MACHINERY, OR EQUIPMENT. CLEAN OR LUBRICATE SHAFTS, BEARINGS, GEARS, OR OTHER PARTS OF MACHINERY. ADJUST FUNCTIONAL PARTS OF DEVICES OR CONTROL INSTRUMENTS, USING HAND TOOLS, LEVELS, PLUMBBOBS, OR STRAIGHT EDGES. ORDER PARTS, SUPPLIES, OR EQUIPMENT FROM CATALOGS OR SUPPLIERS. PLANAND LAYOUT REPAIR WORK, USING DIAGRAMS, DRAWINGS, BLUEPRINTS, MAINTENANCE MANUALS, OR SCHEMATIC DIAGRAMS. PERFORM GENERAL CLEANING OF BUILDINGS OR PROPERTIES. PAINT OR REPAIR ROOFS, WINDOWS, DOORS, FLOORS, WOODWORK, PLASTER, DRYWALL, OR OTHER PARTS OF BUILDING STRUCTURES. OPERATE CUTTING TO RCHES OR WELDING EQUIPMENT TO CUTOR JOIN METAL PARTS. RECORD TYPE AND COST OF MAINTENANCE OR REPAIR WORK. ASSEMBLE BOILERS AT INSTALLATIONSITES, USING TOOLS SUCH AS LEVELS, PLUMBBOBS, HAMMERS, TO RCHES, OR OTHER HAND TOOLS. TEST AND TREAT WATER SUPPLY. PERFORM ROUTINE MAINTENANCE ON BOILERS, SUCH AS REPLACING BURNERS OR HOSES, INSTALLING REPLACEMENT PARTS, OR REINFORCING STRUCTURAL WEAKNESSES TO ENSUREOPTIMAL BOILER EFFICIENCY. INSTALL EQUIPMENT TO IMPROVE THE ENERGY OR OPERATIONAL EFFICIENCY OF RESIDENTIAL OR COMMERCIAL BUILDING.