HEMT

Occupational Title: Heavy Equipment Maintenance Technician
Key Purpose: Diagnose, service and repair heavy equipment

Critical Work Function
10 Diagnose, service, repair, and test
vehicle engines

Occupational Skills, Knowledge and Conditions

Key Activities

Performance Criteria

Occupational Skills and Knowledge

Conditions

Those duties or task clusters that are necessary to perform each critical work function.

Specific demonstrable performance and standards that indicate when the key activity has been performed successfully.

Those skills and knowledge that are specific to the occupation, such as technical processes or procedures common across the occupation that are critical to the related key activity.

Tools, resources and equipment necessary to carry out key activities and their related performance criteria.

KA
10.1

Conduct engine performance tests.

Number	Criteria
10.1.1	Perform cylinder compression tests.
10.1.2	Perform fuel system performance tests.
10.1.3	Check for air in fuel.
10.1.4	Perform engine crank-case pressure test.
10.1.5	Perform induction/exhaust performance tests.
10.1.6	Perform oil system pressure test.
10.1.7	Perform cooling system test.
10.1.8	Perform emission test.
10.1.9	Perform electronic engine test.
10.1.10	Inspect engine assembly for fuel, oil, coolant, and other leaks to determine needed repairs.
10.1.11	Diagnose engine noises to determine needed repairs.
10.1.12	Post-service performance indicates components performing at or above OEM specifications.

Knowledge of OEM-recommended test procedures

Knowledge of OEM model, serial number, and type

Knowledge and application of appropriate gauges and measuring instruments

Knowledge and usage of PC computer and OEM diagnostic software

Knowledge and usage of shop manuals and other appropriate documentation

Using the following tools, resources, and equipment:

Personal/laptop computer

OEM diagnostic software

Common mechanic's hand tools

Appropriate shop service tools and testing equipment

Appropriate shop service manuals and other documentation.

KA 10.2

Diagnose, service, and repair engine according to OEM diagnosis and repair manuals.

Number	Criteria
10.2.1	Remove and install/replace engine and engine components.
10.2.2	Perform engine tune-up and make necessary adjustments.
10.2.3	Rebuild engine to OEM specifications.
10.2.4	Bleed air from fuel system.
10.2.5	Install engine coolant.
10.2.6	Inspect and replace drive belts and pulleys.
10.2.7	Remove, repair, install/replace, and adjust engine brakes.
10.2.8	Post-service performance indicates components performing at or above OEM specifications.

Understanding of engine operation and theory

Knowledge of engine components and parts and their function

Knowledge and application of appropriate gauges and measuring instruments.

Knowledge and usage of PC and OEM diagnostic tools.

Knowledge and usage of shop manuals and other appropriate documentation

UUsing the following tools, resources, and equipment:

Personal/laptop computer

OEM diagnostic software

Common mechanic's hand tools

Appropriate service tools and testing equipment

Appropriate shop service manuals and other documentation