Modification History
Not Applicable
Unit Descriptor
Unit descriptor |
This unit covers compression testing and tuning up the engine. |
Application of the Unit
Application of the unit |
This unit applies to tune up procedures and evaluation of engine performance on compression ignition engines. The person performing these tasks should demonstrate an understanding of theory and be able to carry out procedures associated with servicing, adjusting and evaluating engine performance and be able to perform the following:
Band : A Unit Weight : 4 |
Licensing/Regulatory Information
Not Applicable
Pre-Requisites
Prerequisite units |
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Path 1 |
MEM09002B |
Interpret technical drawing |
MEM12023A |
Perform engineering measurements |
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MEM18001C |
Use hand tools |
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MEM18002B |
Use power tools/hand held operations |
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MEM18026C |
Test compression ignition fuel systems |
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MEM18055B |
Dismantle, replace and assemble engineering components |
Employability Skills Information
Employability skills |
This unit contains employability skills. |
Elements and Performance Criteria Pre-Content
Elements describe the essential outcomes of a unit of competency. |
Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge section and the range statement. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
1. Compression test engine |
1.1. Injectors are removed and fuel system for each cylinder is isolated correctly. 1.2. Appropriate adaptors are selected and fitted. 1.3. Readings obtained are accurately recorded and interpreted. 1.4. Compression readings are corrected for adaptor used. |
2. Perform tune up |
2.1. If applicable, firing pressures are accurately determined and adjusted to specification. 2.2. Engine is started, operated, loaded, and shut down safely. 2.3. Test equipment is correctly applied. 2.4. Air restriction, boost, back pressure and flow tests are performed according to manufacturers' recommendations. 2.5. Readings are recorded and variances from specifications are correctly determined. 2.6. Density of exhaust smoke is correctly determined. 2.7. Valve clearance and/or timing is correctly adjusted. 2.8. Injection pump or injector timing is adjusted to specification. 2.9. Governor rack travel, torque spring load limit, overspeed trips, aneroid or fuel ratio control is adjusted to specification. 2.10. Injector opening pressure is correctly determined and adjusted. |
Required Skills and Knowledge
REQUIRED SKILLS AND KNOWLEDGE |
This section describes the skills and knowledge required for this unit. |
Required skills |
Look for evidence that confirms skills in:
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Required knowledge |
Look for evidence that confirms knowledge of:
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Evidence Guide
EVIDENCE GUIDE |
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The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package. |
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Overview of assessment |
A person who demonstrates competency in this unit must be able to tune diesel engines. Competency in this unit cannot be claimed until all prerequisites have been satisfied. |
Critical aspects for assessment and evidence required to demonstrate competency in this unit |
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. |
Context of and specific resources for 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. This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with tuning diesel engines, 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. |
Guidance information for assessment |
Range Statement
RANGE STATEMENT |
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The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
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Unit Sector(s)
Unit sector |
Co-requisite units
Co-requisite units |
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Competency field
Competency field |
Maintenance and diagnostics |