Application
This unit describes the performance outcomes required to diagnose and repair faults in the inboard propeller drive systems of marine vessels. It involves preparing for the task, selecting the correct diagnostic procedure, carrying out the diagnosis and the repair, performing post-repair testing, and completing workplace processes and documentation.
It applies to those working in the marine service and repair industry.
No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.
Elements and Performance Criteria
Elements Elements describe the essential outcomes. | Performance Criteria Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section. |
1. Prepare to diagnose and repair an inboard propeller drive system | 1.1 Job requirements are determined from workplace instructions 1.2 Diagnostic information is sourced and interpreted 1.3 Diagnostic options are analysed and those most appropriate to the circumstances are selected 1.4 Hazards associated with the work are identified and risks are managed 1.5 Diagnostic tools and equipment are selected and checked for serviceability |
2. Diagnose propeller drive system | 2.1 Diagnostic tests are performed according to workplace procedures and safety requirements 2.2 Faults are identified from diagnostic test results and causes of faults are determined 2.3 Diagnosis findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments |
3. Repair propeller drive system | 3.1 Repair information is sourced and interpreted 3.2 Repair options are analysed and those most appropriate to the circumstances are selected 3.3 Repair tools, equipment and materials are selected and checked 3.4 Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures and safety requirements, and without causing damage to components or systems 3.5 Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair process are rectified |
4. Complete work processes | 4.1 Final inspection is made to ensure work is to workplace expectations and vessel is presented ready for use or stored according to workplace procedures 4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected 4.3 Tools and equipment are checked and stored according to workplace procedures 4.4 Workplace documentation is processed according to workplace procedures |
Evidence of Performance
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:
diagnose and repair a fault in three different marine inboard propeller drive systems, including two of the following:
direct drive
V-drive
drop-centre.
Evidence of Knowledge
Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing inboard propeller drive systems, including procedures for working with rotating shafts
application, purpose and operation of inboard propeller drive systems and components, including:
direct drive, including:
drive plate
transmission (forward, neutral and reverse)
coupling and key
propeller shaft
gland
log
strut, including A frame and I type
bearing, including cutlass and fibre bearings
propeller
V-drive, including:
drive plate
jack shaft
transmission (forward, neutral and reverse)
coupling and key
propeller shaft
gland
log
strut, including A frame and I type
bearing, including cutlass and fibre bearings
propeller
drop-centre drive, including:
drive plate
transmission (forward, neutral and reverse)
coupling and key
propeller shaft
gland
log
strut, including A frame, I type and stern tube
bearing, including cutlass and fibre bearings
propeller
diagnostic testing procedures for inboard propeller drive systems, including:
propeller shaft wear, including trueness and run-out
bearing wear and run-out measurements
coupling alignment checking methods, including laser and feeler gauge procedures
engine and transmission mount testing procedures
dismantling procedures for inboard propeller drive systems, including procedures for:
using propeller pullers
using bearing pullers
applying heat and cooling
inspecting components, including shaft run-out
repair procedures for inboard propeller drive systems, including procedures for replacing couplings and bearings
assembly procedures for inboard propeller drive systems, including procedures for:
checking and adjusting propeller shaft run-out
aligning couplings
post-repair testing procedures for inboard propeller drive systems, including procedures for water testing.
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 inboard propeller drive systems in marine vessels that they have worked on, 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:
marine repair workplace or simulated workplace
workplace instructions
manufacturer inboard propeller drive system specifications
three different marine vessels with faults in the inboard propeller drive systems specified in the performance evidence
diagnostic equipment for inboard propeller drive systems
tools, equipment and materials appropriate for repairing and adjusting marine inboard propeller drive systems.
Foundation Skills
This section describes those language, literacy, numeracy and employment skills that are essential to performance and are not explicit in the performance criteria.
Skills | Description |
Learning skills to: | locate appropriate sources of information efficiently. |
Reading skills to: | interpret information from manufacturer and workshop literature when seeking inboard propeller drive system specifications and procedures. |
Writing skills to: | legibly and accurately fill out workplace documentation when reporting diagnostic findings, making repair recommendations, and recording parts and material used. |
Oral communication skills to: | clarify instructions report diagnostic findings and make repair recommendations. |
Numeracy skills to: | measure inboard propeller drive system components and use basic mathematical operations, including addition and subtraction, to calculate distances, tolerances and deviations from manufacturer specifications. |
Planning and organising skills to: | plan own work requirements and prioritise actions to achieve required outcomes and ensure tasks are completed within workplace timeframes. |
Technology skills to: | use precision measuring equipment, such as micrometers and dial indicators. |
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.
Safety requirements must include: | work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with rotating shafts. |
Sectors
Technical - Driveline and Final Drives
Competency Field
Marine