This is skilled work in the maintenance and repair of buildings, machinery and mechanical equipment for the Miami-Dade Water and Sewer Department.

Employees in this class perform specialized mechanical work in a manual trade or skilled work in more than one craft. Work involves the maintenance and repair of mechanical equipment, machinery and electrical apparatus used at a wide variety of water and sewer buildings and facilities including pumping equipment and accessories, piping, water tanks, pneumatic and hydraulic tools, and gasoline and diesel-powered equipment. Employees work independently using handtools, power tools and various precision-measuring and testing instruments. Assignments may be in the form of sketches, diagrams or written instructions and may involve locating defective parts or determining the cause of malfunctioning equipment. Work is reviewed by a technical supervisor who inspects work occasionally in progress and upon completion for compliance with instructions and satisfactory operation of equipment repaired and maintained.

ILLUSTRATIVE TASKS

Overhauls, repairs and maintains pumping equipment; inspects and determines extent of required repairs, removes equipment, disassembles pumps, replaces and installs bearings and packing sleeves, removes and installs impellers and wear rings, installs rebuilt pumps, aligns shafts of motors to pumps, and tests pump units for proper operation.

Performs rough welding to repair pumping equipment, pump bases, motor bases, piping and water tanks; replaces fittings or re-pipes seal water systems.

Performs preventive maintenance work through removing and inspecting pumping equipment, taking accurate measurements and pressure readings and conducting visual inspections; repairs valves and piping.

Operates shop equipment including lathe to trim impellers and perform minor shaft repairs, and operates drill press, shear and brake in the fabrication of equipment such as water tanks, pump bases and wetwell covers.

Repairs and overhauls various types of gasoline and diesel equipment including tamper plates, cement mixers and arrowboards.

Repairs and overhauls various types of pneumatic and hydraulic tools including air impact tools, jackhammers, sump pumps, air saws and grinders.

Repairs and overhauls various types of mechanical tools such as tapping machines, reed pipe cutters, rigid pipe cutters and pipe threaders.

Designs, manufactures and installs cabinets and shelving for clamps, fittings and other small tools stored on crew trucks.

Repairs and maintains all parts on jetters and vactors including pressure hoses, guages and pumps.

Repairs and overhauls hydraulic pumps, high pressure pumps, generators and air compressors.

Makes simple time and material estimates for proposed jobs; maintains records of equipment repaired and maintained

Observes established safety practices and procedures.

Performs related work as required.

KNOWLEDGES, ABILITIES, AND SKILLS

Considerable knowledge of the methods, materials, tools and practices used in a specialized trade or in the building, electrical or mechanical crafts.

Considerable knowledge of the occupational hazards and safety precautions of the building, electrical and mechanical trades.

Knowledge of the principles of mechanics.

Knowledge of the operating, repair and maintenance characteristics of a wide variety of specialized mechanical and electrical equipment used in water and sewer installations.

Knowledge of the operating, repair and maintenance characteristics of a wide variety of mechanical and electrical equipment in use in water and sewer buildings and facilities.

Ability to detect malfunctions in machinery and equipment and make necessary repairs or adjustments.

Ability to work from verbal or written instructions, simple diagrams and sketches.

Ability to make simple time and material estimates.

Skill in the use of a variety of hand tools, machines and power tools used in a craft or in building and machinery repair work.

Physical strength and agility sufficient to perform assigned duties.

NEW 10-96