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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare to diagnose and repair powershift 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 powershift transmission
   • Diagnostic tests are carried out according to manufacturer specifications, workplace procedures, and environmental 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. Repair powershift transmission
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repair tools, equipment and materials are selected and checked according to manufacturer procedures
   • 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
   • 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
   • Final inspection is made to ensure work is to workplace expectations and machinery or transmission is presented ready for use
   • 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
5. Prepare to diagnose and repair powershift 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
6. Diagnose powershift transmission
   • Diagnostic tests are carried out according to manufacturer specifications, workplace procedures, and environmental 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
7. Repair powershift transmission
   • Repair information is sourced and interpreted
   • Repair options are analysed and those most appropriate to the circumstances are selected
   • Repair tools, equipment and materials are selected and checked according to manufacturer procedures
   • 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
   • 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
8. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and machinery or transmission is presented ready for use
   • 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 isolating and stabilising machines.
Environmental requirements must include:	procedures for trapping, storing and disposing of hydraulic fluid released from powershift 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 vehicles or machines with the following powershift transmissions:

multiple countershaft transmission

planetary shift transmission

conduct powershift transmission stall test during above work according to manufacturer specifications and workplace procedures.

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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 powershift transmissions, including procedures for isolating and stabilising machines

environmental requirements, including procedures for trapping, storing and disposing of hydraulic fluid released from powershift transmissions

operating principles of powershift transmissions and associated components, including:

torque converters, torque divider torque converters and variable capacity torque converters

electronically modulated transmission

countershaft transmissions, including:

gear types

gear ratios and torque reduction and multiplication

simple and compound gear trains

compound planetary transmissions, including:

gear types

gear ratios and torque reduction and multiplication

simple and compound planetary gear trains

transmission control valves and solenoids

hydraulic circuits and schematics

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

power flows in:

multiple countershaft transmissions

compound planetary transmissions

torque converters, torque divider torque converters, and variable capacity torque converters

hydraulic components and hydraulic control components, including:

oil pumps

hydraulic valves

electronic transmission pressure modulation

power train electronic control system

mechanical components, including:

clutch packs

one-way clutches

planetary gears

compound gear sets

powershift electronic control systems

transfer cases

hydraulic oils and filters

diagnostic testing procedures for powershift transmissions, including:

following safety requirements when stall testing

stall testing according to manufacturer specifications and workplace procedures

dismantling procedures for powershift transmissions, including:

measuring clearances and tolerances

inspecting components

repair procedures for powershift transmissions, including procedures for inspecting, evaluating and measuring component wear

post-repair testing procedures for powershift transmissions, including:

stall testingaccording to manufacturer specifications and workplace procedures.

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