WORK PROCESSES
CONSTRUCTION –EQUIPMENT MECHANIC
O*NET/SOC CODE: 49-304200 RAPIDS CODE: 0336
Description : Analyzes. malfunctions and repairs, rebuilds, and maintains construction equipment, such as cranes, power shovels, scrapers, paving machines, motor graders, trench-digging machines, conveyors, bulldozers, dredges, pumps, compressors and pneumatic tools : Operates and inspects machines or equipment to diagnose defects. Dismantles and reassembles equipment, using hoists and handtoos. Examines parts for damage or excessive wear, using micrometers and gauges. Replaces defective engines and subassemblies, such as transmissions. Tests overhauled equipment to ensure operating efficiency. Welds broken parts and structural members. May direct workers engaged in cleaning parts and assisting with assembly and disassembly of equipment. May repair, adjust, and maintain mining machinery, such as stripping and loading shovels, drilling and cutting machines, and continuous mining machines.
ON-THE-JOB TRAINING
APPROXIMATE HOURS
A. ORIENTATION
1000
1. Learn uses of tool and equipment
2. Learn name of parts, (nomenclature)
3. Fundamentals of engine operation
4. Engine print studies
5. Specifications, symbols, diagrams, etc
6. Trade periodicals study
7. Safety observance
8. Remove and disassemble transmissions
9. Remove and disassemble differentials
10. Remove and replace motor from frame
11. Terminology, diesel operation
12. Fuels and lubricants
B. MATERIALS, PARTS (Name and Designation)
1000
1. Learn proper procedure:
a. main bearings
b. pistons
c. cylinder liners
d. bearing clearances
e. crankshaft
f. connecting rods
2. Disassembly and replacement
3. Remove and replace pan
4. Learn use of machine tools
5. Operation care and maintenance
6. Theory of job and processes
C. GENERAL REPAIR AND REPLACEMENT JOB
1500
1. Remove, repair and replace pan, starter and manifolds
2. Remove, clean and replace cylinder head
3. Remove, check and replace crankshaft, and timing
4. Remove, check and adjust governor
5. Replace governor
D. MOTOR REPAIR, OVERHAUL OR INSTALL
1800
1. Remove, check, repair and replace water pump
2. Remove, check and replace injector system, fuel pump,
pistons and piston rings, camshaft and bearings
3. Remove, check, replace and adjust connecting rod bearings
4. Remove, check, grind, and replace valves
5. Remove and replace cylinder liners
6. Assemble motor, adjust valves, check timing and test motor
7. Adjust for proper mixture
8. Make final test and check operation
E. AIR COMPRESSORS
350
1. Check pump, dismantle, repair and assemble
2. Check tank and pressure gauge
3. Study parts book and service manual
F. GAS ENGINES
350
1. Air cooled
a. dismantle, repair and assemble
2. Water cooled
a. dismantle, repair and assemble
3. Study parts book and service manual
G. CONCRETE MIXERS
200
1. Learn sizes
2. Learn about moving parts
3. Dismantle, clean, repair and assemble
H. BULLDOZERS
200
1. Learn types and sizes
2. Learn names and identify moving parts
3. Study parts book and service manuals
I. GRADERS
200
1. Learn types and sizes
2. Learn names of all moving parts
3. Study parts book and service manual
4. Dismantle, repair and assemble
J. MOTOR SCRAPERS
500
1. Oil and grease
2. Service engine
3. Learn scraper parts
4. Study parts book and service
5. Dismantle repair and assemble
K. POWER SHOVELS
400
1. Learn types
2. Identify all parts and service
3. Study parts books and service manuals
4. Dismantle, repair and assemble
L. TRUCK CRANES
400
1. Learn various types
2. Identify parts and service
3. Study service manual
4. Dismantle, repair and assemble
M. WELDING
100
1. Learn use of acetylene torches
2. Learn to do electrical welding
TOTAL HOURS
8000
