2340 version 3
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Demonstrate knowledge of pneumatic system principles and operation
for heavy vehicles and equipment
Level
3
Credits
6
Purpose
This theory-based unit standard is for people in the automotive repair
industry. People credited with this unit standard are able to demonstrate
knowledge of: pneumatic principles; heavy vehicle pneumatic suspension
operation; heavy vehicle and equipment transmission control systems; air
brake components on heavy vehicles and equipment; and air brake system
operation.
Subfield
Motor Industry
Domain
Automotive Pneumatics
Status
Registered
Status date
21 September 2007
Date version published
21 September 2007
Planned review date
31 December 2012
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
Accreditation and Moderation Action Plan (AMAP) reference
0014
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Legislation and publications relevant to this unit standard include but are not limited
to – Land Transport Rule: Heavy-vehicle Brakes 2006, Rule 32015 (incorporates the
Heavy Vehicle Brake Code); Vehicle Inspection Requirements Manual (VIRM) – Inservice certification.
 New Zealand Qualifications Authority 2016
2340 version 3
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2
Land Transport Rules are produced for the Minister of Transport by Land Transport
New Zealand. These rules are available online at
http://www.landtransport.govt.nz/rules/.
The VIRM is published by Land Transport New Zealand and is available online at
http://www.landtransport.govt.nz/certifiers/virm-in-service/index.html.
3
Definition
Service information may include but is not limited to – technical information of a
vehicle, machine, or product detailing operation; installation and servicing
procedures; manufacturer instructions and specifications; technical terms and
descriptions; and detailed illustrations. This can be accessed in hard copy or
electronic format and is normally sourced from the manufacturer.
Elements and performance criteria
Element 1
Demonstrate knowledge of pneumatic principles.
Performance criteria
1.1
Pneumatic principles are described in accordance with service information.
Range
atmospheric pressure, air pressure, partial vacuum, units of
measurement.
Element 2
Demonstrate knowledge of heavy vehicle pneumatic suspension operation.
Performance criteria
2.1
Heavy vehicle air springs and components are described in accordance with
service information.
Range
2.2
reversible sleeve air spring, bellows air spring, pressure protection
valve, levelling valve.
The operation of heavy vehicle air suspension is described in accordance with
service information.
Range
height adjustment, automatic levelling, manual level control, tag
axle lifting.
 New Zealand Qualifications Authority 2016
2340 version 3
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Element 3
Demonstrate knowledge of heavy vehicle and equipment transmission control systems.
Performance criteria
3.1
Transmission control systems are described in accordance with service
information.
Range
range change, splitter.
Element 4
Demonstrate knowledge of air brake components on heavy vehicles and equipment.
Performance criteria
4.1
The purpose and operation of the brake system components are described in
accordance with service information.
Range
compressor, governor, unloader, air tanks, drain, check and safety
valves, brake valve, relay valve, quick release valve, breakaway
valve, emergency air supply, air lines, brake chambers, slack
adjuster, spring brakes, emergency systems on dangerous goods
vehicles.
Element 5
Demonstrate knowledge of air brake system operation.
Performance criteria
5.1
The brake system type is identified from service information.
5.2
Brake operation is described using a brake schematic diagram.
5.3
The servicing requirements of the brake system are explained in accordance
with service information.
Range
5.4
compressor, reservoirs, adjustments, pressure, linings, leaks,
lubrication.
Air brake system requirements for Certificate of Fitness and conformity with
legislative requirements are identified.
Range
braking operation, pressure warning, reservoir capacity.
 New Zealand Qualifications Authority 2016
2340 version 3
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5.5
The operation of an anti-lock braking system (ABS) for an air brake system and
the purpose of the major components are identified in accordance with service
information.
Range
major components include wheel speed sensor, exciter ring,
electronic control unit, control valves.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP 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.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated)
janet.lane@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016