NZQA Expiring unit standard
8185 version 5
Page 1 of 3
Title
Describe four wheel drive (4WD) systems, and diagnose and rectify
free-wheeling hub faults
Level
4
Credits
4
Purpose
This unit standard is for people in the automotive repair
industry. People credited with this unit standard are able to
demonstrate knowledge of four wheel drives, and diagnose and
rectify 4WD free-wheeling hub faults.
Classification
Motor Industry > Automotive Transmission Systems
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Appropriate driver's licence for the vehicle being driven.
Explanatory notes
1
The following legislation, publication, and amendments are to be consulted and
followed where applicable:
– Health and Safety in Employment Act, 1992;
– New Zealand Road Code, Land Transport Safety Authority.
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.
3
Because 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.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
8185 version 5
Page 2 of 3
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of four wheel drives (4WD).
Evidence requirements
1.1
Four wheel drive arrangements are described according to vehicle
manufacturer’s manual descriptions.
Range
1.2
Transfer assembly layouts are described according to vehicle manufacturer’s
manual descriptions, and parts are identified.
Range
1.3
transmission and transfer case assembly, manual transmission
with a transfer case, centre (third) differential, four wheel drive
transaxles.
Power transfer through a transfer case is described according to vehicle
manufacturer’s manual descriptions.
Range
1.4
light commercial vehicle, car with normal front wheel drive
arrangement, vehicles with rear engines.
gear transfer, chain drive, centre differential lock, viscous coupling.
Power flow through a transfer case is described according to vehicle
manufacturer’s manual descriptions.
Range
two wheel drive high range, four wheel drive high range, four
wheel drive low range.
Outcome 2
Diagnose and rectify 4WD free-wheeling hub faults.
Evidence requirements
2.1
Safe working practices are observed throughout the task.
Range
personal safety, safety of others, equipment and vehicle safety.
2.2
Suitable tools and equipment are selected and used that enable hub faults to be
rectified.
2.3
The vehicle is operated, in compliance with the Road Code where applicable,
and the nature of any faults is determined according to vehicle manufacturer's
specifications.
2.4
The hub is disassembled and cleaned according to vehicle manufacturer's
instructions.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
8185 version 5
Page 3 of 3
2.5
The parts are inspected for damage and wear, and their suitability for further
service is determined when compared with vehicle manufacturer's
specifications.
2.6
The hub is assembled according to manufacturer's instructions, any faults are
rectified, and adjustments are made to meet vehicle manufacturer's
specifications.
Replacement information
This unit standard has been replaced by unit standard
24325, unit standard 24326, and unit standard 24327.
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
21 August 1996
31 December 2016
Review
2
20 December 1998
31 December 2016
Revision
3
16 October 2003
31 December 2016
Review
4
25 February 2008
31 December 2016
Rollover
5
19 November 2010
31 December 2016
Accreditation and Moderation Action Plan (AMAP) reference
0014
This AMAP 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, 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 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.
Consent 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.
NZ Motor Industry Training Organisation
(Incorporated)
SSB Code 101542
 New Zealand Qualifications Authority 2016