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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 heavy vehicle manual 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 manual 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 manual 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 vehicle 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 heavy vehicle manual 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 manual 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 manual 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 vehicle 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: using transmission lifting and supporting equipment manual handling heavy vehicle manual transmissions.
Environmental requirements must include:	procedures for trapping, storing and disposing of clutch dust, brake fluid and oils released from manual 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:

disassemble and reassemble one heavy vehicle manual transmission that has a minimum of 9 speeds.

diagnose and repair a fault in three of the following components of a heavy vehicle manual transmission:

input shaft

gear shift mechanisms

gears and shafts

transmission bearings

auxiliary section and controls

gasket and seal leaks

remove, refit or replace a heavy vehicle manual transmission.

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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 heavy vehicle transmissions, including procedures for:

using transmission lifting and supporting equipment

manual handling heavy vehicle manual transmissions

environmental requirements, including procedures for trapping, storing and disposing of clutch dust, brake fluid and oils released from manual transmissions

operating principles of heavy vehicle manual transmissions and associated components, including:

gears, including:

gear types

gear ratios and torque reduction and multiplication

simple gear trains

compound gear trains

application, purpose and operation of heavy vehicle manual transmissions and components, including:

power flows, including:

longitudinal manual transmissions

transfer cases

synchromesh operation

gearshift mechanisms, including:

mechanical

air

electrical/pneumatic

electronically automated manual transmissions

transfer cases

power take-off

diagnostic testing procedures for heavy vehicle manual transmissions, including:

abnormal noise diagnosis

electronic diagnosis

shift diagnosis

dismantling procedures for heavy vehicle manual transmissions, including:

measuring clearances and tolerances

inspecting components

repair procedures for heavy vehicle manual transmissions, including:

gears, shafts and bearings

electronic control systems

gear shift mechanism

post-repair testing procedures for heavy vehicle manual transmissions.

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