Page 1 of 7 Title 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. Classification Motor Industry > Tyres Available grade Achieved Entry information Critical health and safety prerequisites Unit 24461, Demonstrate knowledge of heavy machine and equipment tyres and wheels, or demonstrate equivalent knowledge and skills. Explanatory 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. 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 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.
Page 2 of 7 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 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. Outcomes and evidence requirements Outcome 1 Carry out maintenance checks on heavy machine or equipment tyres. 1.1 Safe working practices are observed throughout the task in accordance with 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. 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. 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.
Page 3 of 7 1.6 Factors that determine tyre performance are identified in accordance with tyre manufacturer recommendations. 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. 1.7 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. 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. Outcome 2 Remove wheels from heavy machines or equipment. single wheels, dual wheels. 2.1 Safe working practices are observed throughout the task in accordance with 2.2 Suitable tools and equipment are selected and used to enable the wheel to be removed in accordance with company requirements. 2.3 Wheel type is identified to enable manufacturer removal procedure to be followed in accordance with company requirements. 2 part component (PC), 3 PC, 4 PC. 2.4 The machine or equipment is raised and secured in accordance with manufacturer specifications to enable the wheel to be removed. 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.
Page 4 of 7 2.5 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. 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. Outcome 3 Remove pneumatic tyres from wheels and refit them. 3.1 Safe working practices are observed throughout the task in accordance with 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. 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. 3.6 The tyre is removed from the wheel without damage to the beads and wheel rims. 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.
Page 5 of 7 3.7 Components are checked for condition and cleaned. Any faults or damage are reported to the supervisor in accordance with company requirements. 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. 3.8 The tyre and tube assembly is assembled to the wheel without damage to components in accordance with company requirements. 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. 3.9 The tyre is inflated to the tyre manufacturer recommended operating pressure, and the valve cap replaced. 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. 3.10 The tyre is checked to ensure that no leaks exist as a result of fitting the tube or tyre assembly. Outcome 4 Remove and fit industrial cushion solid type (resilient) tyres. rubber, urethane, press on band (POB). 4.1 Safe working practices are observed throughout the task in accordance with 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.
Page 6 of 7 4.4 Suitability of replacement and compatibility are established in accordance with tyre manufacturer recommendations. may include but is not limited to condition of wheel and tyre, compatibility of wheel and band, intended use. 4.5 The tyre is pressed off and pressed on to the wheel in position, without causing damage to the wheel assembly, tyre or band. Outcome 5 Refit wheels to heavy machines or equipment. single wheels, dual wheels. 5.1 Safe working practices are observed throughout the task in accordance with 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. may include but are not limited to spacers, inner and outer nuts, location lugs, tyre type and size, tyre condition, load capacity. 5.4 The wheel is fitted to the machine or equipment in a safe manner, without damage to components in accordance with company requirements. 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. Replacement information This unit standard was replaced by unit standard 30220 and unit standard 30221. This unit standard and unit standard 24461 replaced unit standard 11741 and unit standard 11742.
Page 7 of 7 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 25 January 2008 31 December 2019 Review 2 18 May 2017 31 December 2019 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. 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.