Elements and Performance Criteria

The range statement provides information about the context in which the unit of competency is carried out. The variables and scope cater for different work requirements, work practices and knowledge between States, Territories and the Commonwealth, and between organisations and workplaces. The range statement relates to the unit as a whole and provides a focus for assessment. Text in italics in the performance criteria is explained here.
The following variables may be present and may include, but are not limited to, the examples listed under the scope. All work is undertaken to relevant legislative requirements, where applicable
Variable
Scope
Manufacturers' catalogue
Any appropriate manufacturers' catalogues that contain replacement parts that conform with specifications and operational requirements
Appropriate workshop practices
Include drilling, scraping, filing, reaming, tapping, threading etc.
Fitting principles and techniques
Limits of tolerance
Allowances and clearances
Effects of wear, stress, temperature
Types of fits - clearance transition interference
Press fitting methods
Force fits
Shrink and freeze (expansion) fits
Keyed fits
Taper fits
Lateral and radial forces
Backlash
Configuration and mating of parts
Applied use of precision tools and measuring equipment
Engineering components - shafts, single and multi throw crankshafts, cams and journals, bearings and bearing surfaces, keys
Squareness, roundness, concentricity, flatness, straightness, surface finish, angular correctness
Datum and centrelines
Tapping, reaming, broaching

The evidence guide specifies the evidence required to demonstrate achievement in the unit of competency as a whole. It must be read in conjunction with the unit descriptor, performance criteria, range statement and the assessment guidelines for the Metal and Engineering Training Package
Overview of assessment requirements
A person who demonstrates competency in this unit must be able to repair and fit engineering components. Competency in this unit cannot be claimed until all prerequisites have been satisfied.
Context of assessment
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.
Interdependent assessment
This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with repairing and fitting engineering components or other units requiring the exercise of the skills and knowledge covered by this unit.
Method of assessment
Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.
Consistency of performance
Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.
Required skills
Look for evidence that confirms skills in:
obtaining operational specifications for the component/s
assessing operation against specification and identifying faults
checking component/s visually and dimensionally against the operational specifications using work site procedures
checking repaired components visually and dimensionally for conformance to specifications
adjusting components to achieve conformance to specifications where appropriate
selecting replacement parts which conform to specifications
preparing and assembling components using appropriate fitting techniques and principles
where appropriate, applying gland packing, jointing or gasket materials, using acceptable engineering practices
applying appropriate lubricants to the assembly using acceptable engineering practices, where required
checking components for conformance to specification
where appropriate, adjusting components to achieve conformance to specifications
where appropriate, recording any approved modifications/alterations to work site procedures
inspecting the final assembly and checking conformance to operational specifications
where appropriate returning the final assembly to service in accordance with work site procedures
reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents
undertaking numerical operations, geometry and calculations/formulae within the scope of this unit
Required knowledge
Look for evidence that confirms knowledge of:
tools and equipment to be used to dismantle the components
consequences of having components that do not comply with operational specifications
the types of adjustment applicable to the components being repaired/fitted
appropriate methods of repair
the features and/or dimensions upon which replacement parts are to be selected
the process of identifying replacement parts from third party suppliers' catalogues
the material properties required
the manufacturing operations to be used in the production of new components
the sequence of operations to be used in the production of new components
the fitting requirements for assembling components
the appropriate sequence of assembly tasks
the purpose of using gland packing, jointing or gasket materials
the reasons for selecting particular jointing or packing materials
the applications of different types of lubricants
the consequences of using inappropriate or no lubricant
the need to have approval for out of specification modifications
the reasons for documenting out of specification modifications
return to service procedures
the consequences of not following work site return to service procedures
hazard and control measures associated with repairing and fitting engineering components, including housekeeping
safe work practices and procedures