Repair or replace defective equipment parts using hand tools and power tools, and reassemble equipment.  Perform routine preventive maintenance to ensure that machines continue to run smoothly, building systems operate efficiently, and the physical condition of buildings does not deteriorate.  Inspect drives, motors, and belts, check fluid levels, replace filters, and perform other maintenance actions, following checklists.  Use tools ranging from common hand and power tools, such as hammers, hoists, saws, drills, and wrenches, to precision measuring instruments and electrical and electronic testing devices.  Assemble, install and/or repair wiring, electrical and electronic components, pipe systems and plumbing, machinery, and equipment.  Diagnose mechanical problems and determine how to correct them, checking blueprints, repair manuals, and parts catalogs as necessary.  Inspect, operate, and test machinery and equipment in order to diagnose machine malfunctions.  Record maintenance and repair work performed and the costs of the work.  Clean and lubricate shafts, bearings, gears, and other parts of machinery.  Dismantle devices to gain access to and remove defective parts, using hoists, cranes, hand tools, and power tools.  Plan and lay out repair work using diagrams, drawings, blueprints, maintenance manuals, and schematic diagrams.  Order parts, supplies, and equipment from catalogs and suppliers, or obtain them from storerooms.  Adjust functional parts of devices and control instruments, using hand tools, levels, plumb bobs, and straightedges.  Paint and repair roofs, windows, doors, floors, woodwork, plaster, drywall, and other parts of building structures.  Operate cutting torches or welding equipment to cut or join metal parts.  Align and balance new equipment after installation.  Inspect used parts to determine changes in dimensional requirements, using rules, calipers, micrometers, and other measuring instruments.  Set up and operate machine tools to repair or fabricate machine parts, jigs and fixtures, and tools.  Maintain and repair specialized equipment and machinery found in cafeterias, laundries, hospitals, stores, offices, and factories.  Fabricate and repair counters, benches, partitions, and other wooden structures such as sheds and outbuildings.  Estimate repair costs.  Lay brick to repair and maintain buildings, walls, arches and other structures.  Grind and reseat valves, using valve-grinding machines.  The maintenance worker should also be highly organized as he or she will be expected to maintain good records of receipts, invoices and tools. Confidential information is sometimes shared with the maintenance worker therefore the maintenance worker should have the utmost discretion. Also, having one's own tools and maintaining the security and well-being of the county is critical.  Performs other duties as assigned.