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HEAVY MOBILE EQUIPMENT MECHANIC

Essential Competencies

ENTRY LEVEL

Description: This competency identifies the knowledge and skills to perform basic preventive maintenance on a wide variety of Heavy Mobile equipment, following scheduling requirements, manufacturers's guidelines, and by using trouble-shooting techniques and proper tool care.

I. Safety

A. Orientation to Work Area and Safety Procedures

II. Tools and Equipment

A. Proper use care and safety
1. Care and cleaning of shop, tools and equipment.
2. Proper use of hand tools and equipment.
3. Proper use of power tools and equipment.
4. Proper use of diagnostic equipment

III. On the Job Responsibilities

A. Diagnosis and repair of major equipment components.
B. Instruction of lower graded employees.
C. Cleanup and tool use.
D. Safety

IV. Preventive Maintenance of Vehicles

A. Procedures for equipment Servicing
1. Safety inspections.
2. Service requirements.
3. Service procedures.
4. Identification of required service.
5. Documentation of service performed.

Knowledge, Skills and Abilities

Ability to do less complex equipment repairs.

Ability to use basic tools of the automotive trade.

Ability to use manufacturer's manuals and schematics.

Knowledge of shop safety practices.

DEVELOPMENTAL LEVEL

Description: This competency identifies the knowledge and skills to perform intermediate level routine, preventive and cyclic maintenance on a wide variety of heavy mobile equipment, following and interpreting scheduling requirements and manufacturers's guidelines for a wide variety of equipment and by using trouble-shooting techniques, proper diagnostic equipment and tool care.

All competencies at the Entry Level, plus:

I. General Engine Diagnosis

A. Cylinder Heads and Valve Trains.
B. Engine Blocks
C. Lubrication and Cooling Systems.
D. Fuel and Exhaust System Diagnosis.
E. Diesel Engine Diagnosis.

II. Drive Train

A. Clutch Diagnosis and Repair.
B. Transmission Diagnosis and Repair.
C. Drive Axle.
D. Hydrostatic drive systems.

III. Steering System Diagnosis and Repair

A. Manual and Power Steering.
B. Wheel Alignment.
C. Two and Four Wheel Drive Systems.

IV. Brake Systems

A. Hydraulic Brake Systems
B. Mechanical Brake Systems
C. Air Brake Systems
D. Air over Hydraulic Systems

V. Electrical Systems

A. Lighting Systems
B. Braking Systems
C. Electronic Control Systems.

VI. Fuel Systems

A. Fuel Injection Systems
B. Fuel Injection Pumps
C. Fuel Injectors
D. Preasure Relief Systems
E. Carbureted Systems

Knowledge, Skills and Abilities

Ability to trouble-shoot failures on a variety of Heavy Mobile Equipment.

Ability to determine type and extent of repairs.

Knowledge of automotive equipment computer control systems.

Knowledge of automotive electrical systems.

Ability to use testing equipment.

FULL PERFORMANCE LEVEL

Description: This competency identifies the knowledge and skills required for full performance of routine, preventive and cyclic maintenance on a wide variety of automotive and heavy mobile equipment, such as loaders, graders, snow blowers, etc. following and interpreting scheduling requirements and manufacturers's guidelines for all equipment and by using trouble-shooting techniques, proper diagnostic equipment. Instruction and training of lower graded employees.

All competencies at the Entry and developmental level, plus:

I. Heavy Mobile Equipment Diagnosis, Repair and Overhaul

A. Diagnostics and Repair
1. Air brake systems.
2. Electrical systems.
3. Starting systems.
4. Charging systems.
5. Lighting systems
6. Air conditioning systems.
7. Heating and engine cooling systems.
8. Electronic controls, devices and systems.
9. Hydraulic systems.
10.Fuel injection systems
11.Engines, Transmissions, Differentials
12.Snow removal equipment and components

B. Welding and Fabrication

Knowledge, Skills and Abilities

Ability as an expert mechanic to do the most complex types of trouble-shooting and repair independently.

Ability to overhaul major equipment components, ie: engines, transmissions, differentials, etc.

Ability to diagnose and repair components and assemblies of heavy mobile equipment, i.e., engines, transmissions, differentials, ignition systems, charging systems etc.

Ability to diagnose and repair electrical systems, i.e., lighting systems, electronic control systems, electriacal control systems etc.

Ability to diagnose and repair hydraulic systems.

Ability to weld and fabricate major components for power driven accessories.

National Park Service
Training and Development Division
Essential Competencies
heaveqme.htm

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