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Check, remove, and refit wheels and tyres from heavy machines or
equipment
Level
4
Credits
10
Purpose
This unit standard is for people in the heavy equipment and tyre repair
industry. People credited with this unit standard are able to: carry out
maintenance checks on heavy machine or equipment tyres; remove wheels
from heavy machines or equipment; remove pneumatic tyres from wheels
and refit them; remove and fit industrial cushion solid type (resilient) tyres;
and refit wheels to heavy machines or equipment.
Subfield
Motor Industry
Domain
Tyres
Status
Registered
Status date
25 January 2008
Date version published
25 January 2008
Planned review date
31 December 2012
Entry information
Prerequisite: Unit 24461, Demonstrate knowledge of
heavy machine and equipment tyres and wheels, or
demonstrate equivalent knowledge and skills.
Replacement information
This unit standard and unit standard 24461 replaced unit
standard 11741 and unit standard 11742.
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 relevant to this unit standard may include but is not limited to – Health
and Safety in Employment Act 1992; Land Transport Rules: Tyres and Wheels 2001,
Rule 32013; Vehicle Repair 1998, Rule 34001.
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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/.
3
Definitions
Company requirements refer to instructions to staff on policy and procedures which
are documented in memo or manual format and are available in the workplace.
These requirements include but are not limited to – company specifications and
procedures, work instructions, manufacturer specifications, product quality
specifications, and legislative requirements.
Heavy machines and equipment in this unit standard refers to forklifts, earth moving
equipment, grader equipment, loaders, dozers, tractors, and other heavy portable
industrial equipment using tubed or tubeless radial and cross ply tyres or industrial
cushion solid type (resilient) tyres.
Suitable tools and equipment means industry approved tools and equipment that are
recognised within the industry as being the most suited to complete the task in a
professional and competent manner with due regard to safe working practices.
4
Range
This unit standard includes – maintenance checks, and removal and refitting
procedures only.
5
Special safety requirements
If the incorrect wheel nuts are loosened in performance criterion 2.5, the split rim may
separate.
Some heavy machines and equipment models have inner and outer nuts that vary by
only 1mm. Precautions must be taken to prevent placing the nuts on the wrong studs
in element 5.
Elements and performance criteria
Element 1
Carry out maintenance checks on heavy machine or equipment tyres.
Performance criteria
1.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
personal safety, safety of others, machine safety, site safety,
environmental safety, tools and equipment safety.
1.2
Suitable tools and equipment are selected and used to carry out maintenance
checks in accordance with company requirements.
1.3
Inflation checks are carried out on cold tyres and tyre pressures are adjusted in
accordance with tyre manufacturer specifications for cold pressure settings.
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1.4
Hot pressure checks are performed to determine pressure build-up during
operating conditions, and any pressure build-up above 25% from cold settings is
reported to the supervisor or operator of the machine or equipment.
1.5
Visual inspection of the tyres is completed in a safe manner and
recommendations for further use or repair are given to the supervisor or
operator of the machine or equipment.
Range
1.6
Factors that determine tyre performance are identified in accordance with tyre
manufacturer recommendations.
Range
1.7
may include but is not limited to – under-inflation damage and
wear, over-inflation damage and wear, heat damage, impact
breaks, cuts, tread depth, tread damage, wall damage.
may include but is not limited to – hours of service, average
speed, grades and curves, matching tyres to application,
operational limits, length of haul, tyre temperature, tyre
maintenance, payload and payload distribution, operator driving
practices.
Tyre maintenance checks are carried out on machines or equipment in
accordance with tyre manufacturer recommendations. Any damage or action
required to prevent damage is reported to the supervisor or operator of the
machine or equipment.
Range
may include but is not limited to – tyre to machine clearance;
wedged stones; matching of dual tyres; overloading; repairs to
cuts; oil, grease or fuel contamination; mechanical problems; rim
damage; wheel damage; abnormal wear; air leaks; separation of
tread or piles; tread depth; valve caps fitted; wheel nuts secure;
locating key secure.
Element 2
Remove wheels from heavy machines or equipment.
Range
single wheels, dual wheels.
Performance criteria
2.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
2.2
personal safety, safety of others, machine safety, site safety,
environmental safety, tools and equipment safety.
Suitable tools and equipment are selected and used to enable the wheel to be
removed in accordance with company requirements.
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2.3
Wheel type is identified to enable manufacturer removal procedure to be
followed in accordance with company requirements.
Range
2.4
The machine or equipment is raised and secured in accordance with
manufacturer specifications to enable the wheel to be removed.
Range
2.5
2 part component (PC), 3 PC, 4 PC.
may include but is not limited to – ensuring load capacity of hoist
and jacking equipment is sufficient for the lift, jacking carried out
on hard even surface, wheels chocked, park brake or emergency
brake applied, jacking point on a load bearing structure that will
support the weight of the machine, supporting blocks of sufficient
load capacity and secure.
The wheel is removed from the machine or equipment in a safe manner and
without damage to the wheel retaining threads in accordance with company
requirements.
Range
may include but is not limited to – valve core removed and tyre
deflated before attempting to remove from the machine or
equipment, visual inspection of tyre and wheel condition before
wheel nuts are loosened, nuts loosened diagonally with machine
or equipment on the ground, wheels removed without risk of
personal injury.
Element 3
Remove pneumatic tyres from wheels and refit them.
Performance criteria
3.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
personal safety, safety of others, machine safety, site safety,
environmental safety, tools and equipment safety.
3.2
Suitable tools and equipment are selected and used to enable the tyre to be
removed and refitted to the wheel in accordance with company requirements.
3.3
The tyre is completely deflated prior to doing any other work on the assembly.
Range
may include but is not limited to – removing valve core, ensuring
valve stem is not obstructed, keeping clear during deflation.
3.4
The tyre bead is removed from its seat on the rim without damage to the tyre
wall and wheel rim.
3.5
The lock ring and flange are removed from multi-piece wheels without stretching
and bending components.
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3.6
The tyre is removed from the wheel without damage to the beads and wheel
rims.
Range
3.7
Components are checked for condition and cleaned. Any faults or damage are
reported to the supervisor in accordance with company requirements.
Range
3.8
may include but is not limited to – ensuring tube and flap are
located without creasing or twisting, dressing the rim, locating
valve stem, lifting tyre and rim, locating and fitting flange and lock
ring, ensuring beads are seated on the rim, ensuring lock ring is in
position in the rim base groove, new O-ring fitted for tubeless tyre,
lubrication, rims assembled before inflating.
The tyre is inflated to the tyre manufacturer recommended operating pressure,
and the valve cap replaced.
Range
3.10
components may include but are not limited to – flange, locking
ring, rim, rust band, tube, flap, valve, tubeless tyre O-ring;
faults or damage may include but are not limited to – removing rust
and dirt, removing foreign objects from inside the tyre, removing
stones from tread, tread condition, inner casing damage, beading
damage.
The tyre and tube assembly is assembled to the wheel without damage to
components in accordance with company requirements.
Range
3.9
may include but is not limited to – lubricating beads, ensuring
beads are in the wheel well, commencing removal of the bead at
the valve, guiding the tube valve through the rim, removing the
rust band and tube from the tyre, lifting rim base from tyre.
may include but is not limited to – wheel assembly placed in a
safety cage or safety restraint, no person standing in front of the
tyre while inflating, assembly positioned in place, ballast
requirements.
The tyre is checked to ensure that no leaks exist as a result of fitting the tube or
tyre assembly.
Element 4
Remove and fit industrial cushion solid type (resilient) tyres.
Range
rubber, urethane, press on band (POB).
Performance criteria
4.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
personal safety, safety of others, machine safety, site safety,
environmental safety, tools and equipment safety.
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4.2
Suitable tools and equipment are selected and used to enable the tyre to be
pressed off and pressed on the wheel in accordance with company
requirements.
4.3
The wheel assembly is inspected for damage. Any signs of faults are reported
to the supervisor in accordance with company requirements.
4.4
Suitability of replacement and compatibility are established in accordance with
tyre manufacturer recommendations.
Range
4.5
may include but is not limited to – condition of wheel and tyre,
compatibility of wheel and band, intended use.
The tyre is pressed off and pressed on to the wheel in position, without causing
damage to the wheel assembly, tyre or band.
Element 5
Refit wheels to heavy machines or equipment.
Range
single wheels, dual wheels.
Performance criteria
5.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
personal safety, safety of others, machine safety, site safety,
environmental safety, tools and equipment safety.
5.2
Suitable tools and equipment are selected and used to enable the wheel to be
fitted to the machine or equipment in accordance with company requirements.
5.3
Wheel to be fitted is compatible to the machine or equipment’s application, and
conforms to machine or equipment manufacturer specifications.
Range
5.4
may include but are not limited to – spacers, inner and outer nuts,
location lugs, tyre type and size, tyre condition, load capacity.
The wheel is fitted to the machine or equipment in a safe manner, without
damage to components in accordance with company requirements.
Range
may include but is not limited to – wheel lifted without risk of
personal injury, nuts tightened diagonally and torqued to machine
or equipment manufacturer specifications, machine lowered to the
ground and rendered safe, inflation pressure to machine or
equipment manufacturer specifications.
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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)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016