# Engine and Other Machine Assemblers > Construct, assemble, or rebuild machines, such as engines, turbines, and similar equipment used in such industries as construction, extraction, textiles, and paper manufacturing. - Code: 51-2031.00 (O*NET-SOC; SOC 2018 51-2031) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 12 tasks (9 core and 3 supplemental) - Page: https://foundation.org.ai/occupations/51-2031.00 - JSON: https://foundation.org.ai/data/tasks/51-2031.00.json ## What the work is made of 1. Read and interpret assembly blueprints or specifications manuals, and plan assembly or building operations. Core task · Task 13962 · Rated by 102 people who do the job, July 2014 2. Inspect, operate, and test completed products to verify functioning, machine capabilities, or conformance to customer specifications. Core task · Task 13958 · Rated by 101 people who do the job, July 2014 3. Position or align components for assembly, manually or using hoists. Core task · Task 13959 · Rated by 102 people who do the job, July 2014 4. Set and verify parts clearances. Core task · Task 13960 · Rated by 102 people who do the job, July 2014 5. Verify conformance of parts to stock lists or blueprints, using measuring instruments such as calipers, gauges, or micrometers. Core task · Task 13965 · Rated by 102 people who do the job, July 2014 6. Fasten or install piping, fixtures, or wiring and electrical components to form assemblies or subassemblies, using hand tools, rivet guns, or welding equipment. Core task · Task 13966 · Rated by 102 people who do the job, July 2014 7. Remove rough spots and smooth surfaces to fit, trim, or clean parts, using hand tools or power tools. Core task · Task 13967 · Rated by 102 people who do the job, July 2014 8. Lay out and drill, ream, tap, or cut parts for assembly. Core task · Task 13968 · Rated by 102 people who do the job, July 2014 9. Rework, repair, or replace damaged parts or assemblies. Core task · Task 13961 · Rated by 102 people who do the job, July 2014 10. Assemble systems of gears by aligning and meshing gears in gearboxes. Supplemental task · Task 13964 · Rated by 102 people who do the job, July 2014 11. Set up and operate metalworking machines, such as milling or grinding machines, to shape or fabricate parts. Supplemental task · Task 13969 · Rated by 102 people who do the job, July 2014 12. Maintain and lubricate parts or components. 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