AS 1973-1993 pdf free

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AS 1973-1993 pdf free.Pneumatic tyres – Passenger car, light truck, and truck/bus – Retreading and repair processes.
AS 1973 sets out a code of practice for the retreading of pneumatic diagonal and radial ply tyres. including requirements for initial inspection, processing, marking and final inspection. It also sets out requirements for in-service repairs to tyres and repairs made in conjunction with the retreading process.
1 It is a fundamental requirement of this Standard that all retreaded tyres be marked to identify the retreader, and that all repairs be identified and marked by the repairer (which may be a retreader where the lyre is repaired concurrently with retreading) (see Section 9).
2 Temporary repairs including the use of externally applied plugs or liquid puncture sealants are not included in this Standard.
1.2 APPLICATION This Standard is intended to be used by repairers and retreaders of passenger car, light truck, and truck/bus tyres intended primarily for on-road use (see Note). Unless otherwise specified, the requirements apply to both tube type and tubeless tyres but do not permit major repairs in passenger car tyres of speed category ‘V’, or higher. This Standard does not apply to pneumatic tyres or tyre/wheel assemblies of the ‘limited-run-flat’ type. the temporary spare. or moped and motorcycle tyres. or to tyres designed primarily for earthmoving. agricultural, industrial, or aviation application.
NOTE: The tyres covered by this Standard are those listed in The Tyre and Rim Association of Australia Standards Manual (Passenger, Truck/Bus Section), or in the equivalent sections of the following documents of overseas organizations:
(a) The Tyre and Rim Association. Year Book.
(b) The Japan Automobile Tyre Manufacturers Association. Year Book.
(c) The European Tyre and Rim Technical Organization. Standards Manual.
1.4.1 Asymmetric tyres—a tyre which, through tread pattern or construction, is required to be titled to a vehicle so that one particular sidewall faces outwards.
1.4.2 Bead—the part of the tyre made of steel bead wires, wrapped or reinforced by piy cords, that is shaped to lit the rim.
1.4.3 Bead area—the area of a tyre between the fitting line (at the bottom of the sidewall) and the bead toe.
NOTE: This area involves both the exterior and the corresponding interior surface of the lyre.
1.4.4 Bead toe—the innermost part of the bead opposite the heel.
1.4.5 Belts—two or more layers of substantially inextensible cord material embodied circumtèrentially within a tyre immediately outside the carcass plies and under the tread. The cord angle relative to the Lyre circumference is lower than that for the carcass plies. Belts are used in radial ply tyres and form an integral structural component of the lyre construction.
1.4.6 Belt edge cover ply—one or more layers of cord fabric, (e.g. nylon) applied circumferentially over the belt edges of some radial ply tyres.
1.4.7 Bias ply tyre—.see Diagonal piy Lyre (Clause 1.4.24).AS 1973 pdf download.

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