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Elements and Performance Criteria

1. Prepare to diagnose and repair transmission
   • Job requirements are determined from workplace instructions
   • Diagnostic information is sourced and interpreted
   • Diagnostic options are analysed and those most appropriate to the circumstances are selected
   • Hazards associated with the work are identified and risks are managed
   • Diagnostic tools and equipment are selected and checked for serviceability
2. Diagnose transmission
   • Diagnostic tests are carried out according to workplace procedures and safety requirements
   • Faults are identified from diagnostic test results and causes of faults are determined
   • Diagnosis findings, including recommendations for necessary repairs or adjustments, are reported according to workplace procedures
3. Dismantle transmission
   • Tools, equipment and materials are selected and checked
   • Transmission is dismantled as required according to workplace procedures and safety and environmental requirements
   • Transmission is cleaned and components arranged for inspection according to workplace procedures and safety and environmental requirements
   • Transmission components are measured and compared with manufacturer specifications
   • Final repair recommendations are made and reported according to workplace procedures
4. Repair and reassemble transmission
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures and safety and environmental requirements, and without causing damage to components or systems
   • Transmission is reassembled according to manufacturer specifications, workplace procedures and safety requirements
   • 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
5. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and vessel or transmission is 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
   • Tools and equipment are checked and stored according to workplace procedures
   • Workplace documentation is processed according to workplace procedures
6. Prepare to diagnose and repair transmission
   • Job requirements are determined from workplace instructions
   • Diagnostic information is sourced and interpreted
   • Diagnostic options are analysed and those most appropriate to the circumstances are selected
   • Hazards associated with the work are identified and risks are managed
   • Diagnostic tools and equipment are selected and checked for serviceability
7. Diagnose transmission
   • Diagnostic tests are carried out according to workplace procedures and safety requirements
   • Faults are identified from diagnostic test results and causes of faults are determined
   • Diagnosis findings, including recommendations for necessary repairs or adjustments, are reported according to workplace procedures
8. Dismantle transmission
   • Tools, equipment and materials are selected and checked
   • Transmission is dismantled as required according to workplace procedures and safety and environmental requirements
   • Transmission is cleaned and components arranged for inspection according to workplace procedures and safety and environmental requirements
   • Transmission components are measured and compared with manufacturer specifications
   • Final repair recommendations are made and reported according to workplace procedures
9. Repair and reassemble transmission
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repairs and component replacements and adjustments are carried out according to manufacturer specifications, workplace procedures and safety and environmental requirements, and without causing damage to components or systems
   • Transmission is reassembled according to manufacturer specifications, workplace procedures and safety requirements
   • 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
10. Complete work processes
    • Final inspection is made to ensure work is to workplace expectations and vessel or transmission is 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
    • Tools and equipment are checked and stored according to workplace procedures
    • 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.

Safety requirements must include:	work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for: working with inboard propeller drive systems and rotating shafts working near hot exhaust systems working in restricted spaces using manual and mechanical lifting equipment.
Environmental requirements must include:	procedures for trapping, storing and disposing of fluids released from transmissions.

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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:

diagnose and repair a fault in two different marine inboard transmissions.

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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 diagnosing and repairing inboard transmissions, including procedures for:

working with inboard propeller drive systems and rotating shafts

working near hot exhaust systems

working in restricted spaces

using manual and mechanical lifting equipment

environmental requirements, including procedures for trapping, storing and disposing of fluids released from transmissions

operating principles of inboard transmissions and associated components, including:

gear types

gear ratios and torque reduction and multiplication

simple gear trains

compound gear trains

lubricant types

application, purpose and operation of inboard transmissions and components, including:

power flows

V-drive transmissions

in-line transmissions

step-up transmissions

hydraulic transmissions

counter shaft transmissions

planetary gear transmissions

mechanical dog clutch transmissions

cone clutch transmissions

methods of matching propeller to transmission gear ratio, engine output and boat performance

diagnostic testing procedures for inboard transmissions, including procedures for analysing:

gear selection problems

drive problems

abnormal system noise

removal procedures for inboard transmissions

dismantling procedures for inboard transmissions, including procedures for:

measuring clearances and tolerances

inspecting components

repair procedures for inboard transmissions, including procedures for replacing:

gearshift mechanisms

bearing and seals, including oil replacement

gears and transmission shafts

assembly procedures for inboard transmissions, including:

shimming bearings and gears

adjusting preloads

installation procedures, including procedures for aligning engines

post-repair testing procedures for inboard transmissions, including procedures for water testing.

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