Assessment Requirements for AURTTM005 Balance rotating and reciprocating engine components

Release: 1

Assessment Requirements for AURTTM005 Balance rotating and reciprocating engine components

Modification History

Release	Comment
Release 1	New unit of competency.

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.

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.

Assessment Conditions

Assessors must satisfy NVR/AQTF assessor requirements.

Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.

Assessment must include direct observation of tasks.

Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the rotating and reciprocating engine components that they have balanced, e.g. repair orders.

Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.

The following resources must be made available:

automotive repair workplace or simulated workplace

workplace instructions

manufacturer engine specifications

material relevant to balancing rotating and reciprocating engine components

multi-cylinder crankshafts, flywheels and piston and connecting rod assemblies specified in the performance evidence and requiring balancing

precision measuring equipment, including:

dial indicators

inside and outside metric and imperial micrometers

scales in 0.1 gram graduations

linishing machine

hand, air and power tools appropriate to balancing rotating and reciprocating engine components.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b4278d82-d487-4070-a8c4-78045ec695b1