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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 hydrostatic 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 hydrostatic transmission
   • Diagnostic tests are carried out according to workplace procedures, safety and environmental 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 hydrostatic 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
   • 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 system
   • 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 vehicle or machinery 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 hydrostatic 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 hydrostatic transmission
   • Diagnostic tests are carried out according to workplace procedures, safety and environmental 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 hydrostatic 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
   • 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 system
   • 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 vehicle or machinery 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.

Diagnostic tests must include:	using pressure gauges and flow meters to diagnose hydrostatic transmissions, including taking pressure readings of the following systems: charge pilot hot oil main hydrostatic loop.
Safety and environmental requirements must include:	work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for: working with high pressure and stored energy hazards isolating and stabilising machines environmental requirements, including procedures for trapping, storing and disposing of fluids released from hydrostatic 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 the hydrostatic transmission systems of two different vehicles or machinery, including in three of the following components:

charge pump

main pump

drive motor

hydraulic lines

heat exchanger

control valve.

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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 hydrostatic transmissions, including procedures for:

working with high pressure and stored energy hazards

isolating and stabilising machines

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

operating principles of hydrostatic transmissions and associated components, including:

closed loop

charge circuitry

flushing circuit

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

charge pump

main pump, including pilot control systems

drive motor, including control systems

filtering

hydraulic lines

heat exchanger

reservoir

diagnostic testing procedures for hydrostatic transmissions, including:

testing charging system

testing closed loop system

testing flushing system

measuring case drains

testing internal and external fluid leaks

checking abnormal noises and operation

using scan tools and multimeter

repair procedures for hydrostatic transmissions, including procedures for:

isolating faults

dismantling components and parts

inspecting and evaluating worn components

repairing and replacing parts

post-repair flow and pressure testing procedures for hydrostatic transmissions.

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