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Title / Demonstrate knowledge of RAD and RFD type diesel governors, and overhaul either of them
Level / 4 / Credits / 6
Purpose / This unit standard is for people in the automotive fuel injection industry. People credited with this unit standard are able to: demonstrate knowledge of RAD type and RFD typefuel governor operations and their repair procedures; dismantle RAD and/or RFD typegovernors and complete inspection reports; renew and replace governor components and reassemble governor; and bench test RAD and/or RFD typefuel governors attached to pump assemblies and adjust their settings.
Classification / Motor Industry > Automotive Fuel Systems and Exhaust
Available grade / Achieved
Explanatory notes
1The following legislation and amendments are required to be consulted and followed where applicable:
Health and Safety in Employment Act, 1992.
2Reference to suitable tools and workshop equipment means industry approved tools and equipment that are recognised within the industry as being the most suited to complete the task to a professional and competent manner with due regard to safe working practices.
3Because of the particular nature of this unit standard, it is essential that the practical assessment evidence is obtained from commercial jobs in the workplace under normal workplace conditions.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of RAD type and RFD typefuel governor operations and their repair procedures.
Evidence requirements
1.1Governor construction is described according to manufacturer's workshop manual description.
Rangefeatures, identification of components, layout of components.
1.2Governor operation is explained according to manufacturer's workshop manual explanation.
Rangemechanical action, torque control devices, cold start devices, boost control.
1.3The importance of cleanliness when working with fuel injection components is identified.
Rangecontamination, precise machining tolerances and close operating fits of components, damage and premature failure.
1.4Faults which affect the governor operation are described according to manufacturer's workshop manual description.
Rangemisalignment of drive train, timing, oil leakage, adjustments, wear.
1.5Wear patterns on components are described according to manufacturer's workshop manual description.
Rangemisalignment, lack of lubrication, corrosion, abrasion.
1.6Servicing procedures are described according to manufacturer's workshop manual description.
Rangeremoving and refitting, cleaning, testing, dismantling, overhauling, reassembling.
Outcome 2
Dismantle RAD and/or RFD typegovernors and complete inspection reports.
Evidence requirements
2.1Safe working practices are observed throughout the task.
Rangepersonal safety, safety of others, equipment safety.
2.2Suitable tools and workshop equipment are selected and used, to enable the governors to be dismantled and inspected.
2.3The governors are dismantled on stripping jigs according to manufacturer's instructions.
2.4All parts are cleaned to enable inspections to be carried out.
2.5Condition reports are completed and given to the supervisor.
Rangeinspection of parts, identifying and recording faults, recommending repairs and replacement of parts.
Outcome 3
Renew and replace governor components and reassemble governor.
Evidence requirements
3.1Safe working practices are observed throughout the task.
Rangepersonal safety, safety of others, equipment safety.
3.2Suitable tools and workshop equipment are selected and used, to enable the components to be replaced and the governor to be reassembled according to manufacturer's specifications.
3.3All parts that are determined as needing replacement are ordered from a supplier.
Rangeinterpreting parts catalogues, using updates and supersessions, obtaining pricing and delivery details.
3.4The governor is reassembled with new and existing parts according to manufacturer's instructions and specifications.
Outcome 4
Bench test RAD and/or RFD typefuel governors attached to pump assemblies and adjust their settings.
Evidence requirements
4.1Safe working practices are observed throughout the task.
Rangepersonal safety, safety of others, equipment safety, safety precautions when working with high pressure fuel.
4.2Suitable tools and workshop equipment are selected and used, to enable the governors to be tested and adjustments made according to manufacturer's specifications.
4.3The governors and fuel pump assemblies are mounted and set up for testing and setting on test benches according to manufacturer's instructions.
4.4The governors are tested, and settings made according to manufacturer's specifications.
4.5The governors and fuel pump assemblies are removed from the test bench with fuel inlets and adjustments sealed.
Replacement information / This unit standard has been replaced by unit standard 24216 and unit standard 24217.This unit standard is expiring. Assessment against the standard must take place by the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process / Version / Date / Last Date for AssessmentRegistration / 1 / 23 February 1999 / 31 December 2016
Review / 2 / 19 April 2002 / 31 December 2016
Review / 3 / 25 January 2008 / 31 December 2020
Rollover / 4 / 19 November 2010 / 31 December 2020
Rollover / 5 / 22 August 2014 / 31 December 2020
Consent and Moderation Requirements (CMR) reference / 0014
This CMR can be accessed at
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
NZ Motor Industry Training Organisation (Incorporated)SSB Code 101542 / New Zealand Qualifications Authority 2018