BS ISO 14400-2021 pdf free download – Road vehicles — Wheels and rims — Use, general maintenance and safety requirements and out-of-service conditions.
This document specifies requirements for the use, general maintenance and safety of wheels and rimsincluding multi-piece wheels and rims. This document defines their out-of-service conditions, such ascracked, worn and bent wheels and rim components. lt is applicable to wheels intended for use on roadas defined in ISO 3833 and off road vehicles.This document does not include mopeds and motorcycles.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3911 apply.
IS0 and IlEC maintain terminology databases for use in standardization at the following addresses:-ISO online browsing platform: available at https://www.iso.org/obp
一IEC Electropedia: available at https://www.electropedia.org/
4 Use and general maintenance requirements
WARNING—On multi-piece rims, the use ofthe wrongring components can resultin catastrophicwheel failure.
4.1Wheel and wheel components
Wheels or parts of wheels which cannot be identified shall not be used even if they seem to have thecorrect functions and the identical dimensions.The characteristics of the wheel centre shall correspondexactly to vehicle parts, especially the axle hub and the brake, in order to guarantee a proper fitting andan effective load transmission.
A neutral non-aggressive mounting paste or liquid shall be used to lubricate the tyre beads. The hub,studs,nuts and the wheel attachment face shall be carefully cleaned.In the case of multi-piece wheels,all contact surfaces shall be cleaned.
Inspect parts for out-of-service conditions, see Clause 6. If cleaning does not restore the originalcondition for the mating surfaces or if the parts have any of the conditions described in Clause 6, theparts shall be replaced.
On the new vehicle and always after a wheel replacement, the mounting torque shall be verified afterapproximately 50 km of running and, where necessary, the wheel nuts shall be retightened. Periodicchecks should also be carried out.
5 General safety requirements
After removal, wheels, rims, studs and nuts shall be checked closely to ensure that they are in goodcondition: namely that any fracture, crack, deformation, corrosion, heavy wear or other kind of non-conformity are not present.
Moreover, no technical modification on the wheel shall be made.Repair by means of welding or by theaddition of material on rims or wheel centres having breakage, fissures, cracks or high wears, shalil notbe made, as they can introduce additional stresses in the critical areas.
NOTE Further detailed information regarding safety recommendations can be found in the technicalcatalogues of the wheel and/or vehicle manufacturers.
6 out-of-service conditions
Typical out-of-service conditions of wheels,rims and components are shown in the following tables andfigures.The conditions of wheel centres are shown in Table 1 and Figures 2 to 14, and the conditions ofrims and components are shown in Table 2 and Figures 15 to 29.
Before checking, wheels shall be cleaned of mud and dirt.
Wheels, rims and components in such conditions shall be removed from service and discarded.Rubbercomponents (valves, sealing rings and 0-rings) with excessive ageing, brittleness or cracks shall beremoved from service and discarded.BS ISO 14400 pdf download.