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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare to balance rotating and reciprocating engine component
   • Job requirements are determined from workplace instructions
   • Methods of balancing component are sourced and interpreted from manufacturer literature and workplace procedures
   • Tools and measuring equipment are selected and checked for serviceability
   • Hazards associated with the work are identified and risks are managed
   • Engine component is prepared for balancing operations and balancing machine is prepared to accept component according to safety requirements
2. Balance rotating and reciprocating engine component
   • Component is mounted and engaged with machine according to workplace procedures and safety requirements, and following machinery safe operating procedures
   • Rotating and reciprocating engine components are balanced in line with workplace requirements and according to workplace procedures, safety requirements, and machinery safe operating procedures, and without causing damage to components or system
3. Complete balancing processes
   • Final inspection is made to ensure work is to workplace requirements
   • Component is cleaned and presented ready for use or stored according to workplace procedures
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Workplace documentation is processed according to workplace procedures
4. Prepare to balance rotating and reciprocating engine component
   • Job requirements are determined from workplace instructions
   • Methods of balancing component are sourced and interpreted from manufacturer literature and workplace procedures
   • Tools and measuring equipment are selected and checked for serviceability
   • Hazards associated with the work are identified and risks are managed
   • Engine component is prepared for balancing operations and balancing machine is prepared to accept component according to safety requirements
5. Balance rotating and reciprocating engine component
   • Component is mounted and engaged with machine according to workplace procedures and safety requirements, and following machinery safe operating procedures
   • Rotating and reciprocating engine components are balanced in line with workplace requirements and according to workplace procedures, safety requirements, and machinery safe operating procedures, and without causing damage to components or system
6. Complete balancing processes
   • Final inspection is made to ensure work is to workplace requirements
   • Component is cleaned and presented ready for use or stored according to workplace procedures
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Workplace documentation is processed according to workplace procedures

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Preparing must include:	procedures for chemically cleaning components without damage checking all components to ensure no further machining is required.
Safety requirements must include:	work health and safety (WHS) and occupational health and safety (OHS) requirements, including operational risk assessment and treatments associated with: electrical safety of balancing equipment and machinery equipment and machinery movement and operation.

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Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

balance one four or six cylinder in-line engine crankshaft assembly, including:

front pulley

crankshaft and flywheel and pressure plate (manual transmission) or drive plate (automatic transmission)

balance one V8 engine crankshaft assembly, including:

front pulley

crankshaft and flywheel and pressure plate (manual transmission) or drive plate (automatic transmission)

balance one piston and connecting rod assembly

during the above work, perform each of the following methods of adding or removing weight from engine components:

drilling

welding

machining.

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Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to balancing rotating and reciprocating engine components, including operational risk assessment and treatments associated with:

electrical safety of balancing equipment and machinery

equipment and machinery movement and operation

operating principles of component balancing, including:

dynamic balance

internally and externally balanced engines

reciprocating mass

rotating mass

sources of torsional vibration

gas pressure

purpose of counterweights, torsional vibration dampeners, and balance shafts in balancing

difference between in-line engine balance, flat plane and V type engine balance, including the effect of the number and angle of cylinders

balancing procedures and techniques, including:

in-line engines, flat plane crankshafts and V type engines

protecting crank pins from damage from bob-weight clamping

protecting main bearing journals from damage from balancing machine cradle rollers or V block

weight matching the pistons and rod ends

methods of calculating bob-weight values for V type and in-line engines, including:

rotating mass with oil allowance

reciprocating mass

effect of number of cylinders and V angle on the total calculation

mounting bob-weights on crankshafts of V type engines

balancing internally balanced engines

balancing externally balanced engines

procedures for adding and removing metal to the crankshaft, including:

drilling and linishing to remove weight

welding to add weight

machining or drilling and adding heavy metal.

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