NZQA Expiring unit standard
5452 version 6
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Title
Demonstrate knowledge of Cummins diesel fuel injectors, and
overhaul them
Level
4
Credits
4
Purpose
This unit standard is for people in the fuel injection industry.
People credited with this unit standard are able to: demonstrate
knowledge of Cummins PT and PT Top Stop type diesel fuel
injectors; and overhaul Cummins diesel fuel injectors.
Classification
Motor Industry > Automotive Fuel Systems and Exhaust
Available grade
Achieved
Explanatory notes
1
The following legislation and amendments are required to be consulted and followed
where applicable:
Health and Safety in Employment Act, 1992.
2
Reference 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.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of Cummins PT and PT Top Stop type fuel injectors.
Evidence requirements
1.1
Injector construction is described according to manufacturer’s manual
description.
Range
1.2
names of parts, shapes of parts, locations of parts.
Injector nozzle operation is explained according to manufacturer’s manual
explanation.
Range
fuel pressure path, needle valve operation, spray patterns.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
1.3
The importance of cleanliness when working with fuel injectors is identified.
Range
1.4
fuel contamination, wear, opening pressure, leakage, damage.
Removing and refitting procedures are described according to manufacturer’s
manual instructions.
Range
1.6
contamination, precise machining tolerances and close operating
fits of parts, damage, premature failure.
Faults which affect injector operation are described according to manufacturer’s
manual fault finding chart.
Range
1.5
5452 version 6
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sealing, cleanliness of injector and surrounding area, torque
settings.
Overhaul procedures are described according to manufacturer’s manual
instructions.
Range
cleaning, testing, dismantling, rectifying faults, reassembling.
Outcome 2
Overhaul Cummins diesel fuel injectors.
Evidence requirements
2.1
Safe working practices are observed throughout the task.
Range
personal safety, safety of others, equipment safety, safety
precautions when working with high pressure fuel.
2.2
Suitable tools and workshop equipment are selected and used, to enable the
injectors to be overhauled according to manufacturer's specifications.
2.3
The injectors are mounted and dismantled on a stripping jig according to
manufacturer's instructions.
2.4
All parts are cleaned to enable an inspection to be carried out.
2.5
A condition report is completed and given to the supervisor.
Range
2.6
inspection of parts, identifying and recording faults, recommending
repairs and replacement of parts.
All parts that are determined as needing replacement are ordered from a
supplier.
Range
interpreting parts catalogues, using up-dates and supersessions,
obtaining pricing and delivery details.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
5452 version 6
Page 3 of 4
2.7
The injectors are reassembled according to manufacturer's instructions and
specifications.
2.8
The injectors are mounted and set up for calibration on a test rig according to
manufacturer's instructions.
2.9
The injectors are calibrated according to manufacturer's specifications.
2.10
The injectors are removed from the test bench with fuel inlets, fuel outlets, and
adjustments sealed.
Replacement information
This unit standard and unit standard 19302 have been
replaced by unit standard 24195, unit standard 24196,
and unit standard 24197.
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 Assessment
Registration
1
31 October 1995
31 December 2016
Review
2
29 March 1999
31 December 2016
Review
3
19 April 2002
31 December 2016
Review
4
25 January 2008
31 December 2020
Rollover
5
19 November 2010
31 December 2020
Rollover
6
22 August 2014
31 December 2020
Consent and Moderation Requirements (CMR) reference
0014
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
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.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
5452 version 6
Page 4 of 4
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 2016