DOT Code: 638.281-014

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Repairs and maintains, in accordance with diagrams, sketches, operation manuals, and manufacturer's specifications, machinery and mechanical equipment, such as engines, motors, pneumatic tools, conveyor systems, and production machines and equipment, using handtools, power tools, and precision‑measuring and testing instruments: Observes mechanical devices in operation and listens to their sounds to locate causes of trouble. Dismantles devices to gain access to and remove defective parts, using hoists, cranes, handtools, and power tools. Examines form and texture of parts to detect imperfections. Inspects used parts to determine changes in dimensional requirements, using rules, calipers, micrometers, and other measuring instruments. Adjusts functional parts of devices and control instruments, using handtools, levels, plumb bobs, and straightedges. Repairs or replaces defective parts, using handtools and power tools. Installs special functional and structural parts in devices, using handtools. Starts devices to test their performance. Lubricates and cleans parts. May set up and operate lathe, drill press, grinder, and other metalworking tools to make and repair parts. May initiate purchase order for parts and machines. May repair electrical equipment.

Work Process Schedule

A.Tool, crib, tool use, tool maintenance400
B.Part and component identification and terminology300
C.Blueprint and diagram interpretation200
D.Equipment and machinery disassembly1000
E.Equipment and machinery inspection1500
F.Diagnosis of operational equipment600
G.Adjustment of operational equipment400
H.Lubrication and cleaning of components and equipment1000
I.Welding, acetylene, and electric400
J.Preparation of maintenance and service records and documentation800
K.Lathe drill press300
L.Hydraulic and electrical connections to mechanical devices300
N.Review and miscellaneous500
(Every 2,000 hours = one year) Total Hours:8000

Related Technical Instruction

The Commonwealth of Massachusetts requires 150 hours each year of related technical instruction which must be mastered by the apprentice in order to successfully complete the program. The following is a general listing of instruction topics for this trade. For further information, please call the Division of Apprentice Training at (617) 626-5409.

1. Blueprint Reading, Sketching, Drawing, and Technical Documentation
2. Related Mathematics
3. Science and Mechanics
4. Mechanical Technology
5. Safety and First Aid
6. Industrial and Labor Relations