On Maintenance Tubeless Large-Sized and Supergiant Tyres of A
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BELSHINA OPEN JOINT-STOCK COMPANY APPROVED BY _________ V.M.Gushcha Chief Engineer of BELSHINA Open Joint-Stock Company ______________ 2008. GUIDE On maintenance tubeless large-sized and supergiant tyres of a radial and diagonal construction for dump trucks of big and especially big weight-lifting capacity, and also the road-building machinery __________ S.N.Kajushnikov Deputy Chief Engineer for technology of BELSHINA Open Joint-Stock Company _______________ 2008. __________ I.N.Kotljarov Chief Designer for tyres of BELSHINA Open Joint-Stock Company _______________ 2008. ___________ V. A. Klyachenkov Chief of technical board of BELSHINA Open Joint-Stock Company _______________ 2008. Bobruisk 2008 THE SUMMARY The present Guide is elaborated on the base and in development earlier developed in 2004 Guide on exploitation tubeless large-sized and supergiant tyres for dump trucks of big and especially big weight-lifting capacity, and also the road-building machinery», by experts of the factory of supergiant tyres of BELSHINA Open Joint-Stock Company . In Guide data on the basic technical characteristics of tubeless tyres of a radial and diagonal construction, particularities of their exploitation are presented. Questions of marking, acceptance, packaging, storage, order of holding of cargo handling operations, transportations of tubeless tyres, order of acquisition by tyres of cars, rules of mounting and dismantle of tyres, maintenance operation and care of tyres, classification of principal types of operation imperfections, the reasons of their origin and the recommendation for elimination of the reasons of origin of imperfections, the calculation of operation of tyres are presented, the claims. The present Guide is obligatory for all economy and the enterprises which use tubeless tyres, intended for dump trucks and lorry convoys of big and especially big weight-lifting capacity, and also the road-building machinery. 2 THE CONTENTS 1 Acceptance of tyres 4 2 Marking and packaging of tyres 5 3 Cargo handling operations and transportation of tyres 7 4 Storage of tyres 8 5 Mounting and dismantle of tyres 9 6 Order of acquisition by tyres of dump trucks of large and super large weight-lifting capacity 12 7 Modes and exploitation conditions 14 8 Calculation of working time of tyres 26 9 Presentation of tyres on the regenerative repair and write-off in breakage 27 10 Manufacturer's Warranty. Claims 27 11 Recommendations to repair of tyres 28 Applications A Instruction on transportation and storage 30 B Calculation of working time of the tyre 31 C Journal of inspection of pressure in tyres 32 G Act about write-off of tyres 32 D Accompanying list 33 Е Act of the claim 34 3 Tubeless large-sized and supergiant tyres of a radial and diagonal construction for dump trucks of large and super large weight-lifting capacity 1 Acceptance of tyres 1.1 Tyres are accepted in lots. The lot are tyres of one designation in number of no more than 4000 pieces, for tyres 24.00-49; 27.00-49; 27.00R49; 31/90-49; 33; 33.00R51; 36/90-51; 40.00-57; 46/90-57 no more than 2000 pieces, accompanied by the quality certificate containing: - Trade mark or trade mark and the manufacturer name; - Designation, model and amount of tyres; - Designation of the standard documents according to which tyres are made; - Batch number; - Shipment date; - Affirming about conformity of tyres to requirements of the standard document on which tyres are made; - Duplicate of the certificate of conformity or data on certification confirming conformity of tyres to obligatory requirements of the standard document on which tyres are made. The acceptance of tyres for dump trucks of large and super large weight-lifting capacity should be carried out according to working order of acceptance of production on amount and quality. Tyres with manufacturing defects and the identification mark mismatching requirements of the working standard documentation on the tyres are not subject of acceptance. 4 2 Identification mark and packaging of tyres 2.1 On each tyre should be accurately indicated: For tyres of a diagonal construction (fig. 1а) Fig. 1а 1 - trade mark and (or) the name of the manufacturer; 2 - company name; 3 - designation of the size of the tyre (on both sides of a tyre cover); 4 - designation of model of the tyre (on both sides of a tyre cover); 5 - "Tubeless" - for tubeless tyres; 6 - ply-rating of NC or PR *; 7 - country-manufacturer in English "Made in BELARUS"; 8 – order number; 9 - indicating of the standard document (technical specifications or GOST); 10 –tread pattern code; 11 – assignment of the tyre for cars in English “Off the road”; 12 – the symbol of speed; 13 – the loading index; 5 For tyres of a radial construction (fig. 1b) Fig. 1b 1 - trade mark and (or) the name of the manufacturer; 2 - company name; 3 - designation of the size of the tyre (on both sides of a tyre cover); 4 - designation of model of the tyre (on both sides of a tyre cover); 5 - "Tubeless" - for tubeless tyres; 6 –strength index **; 7 - country-manufacturer in English "Made in BELARUS"; 8 –order number ***; 9 - indicating of the standard document (technical specifications or GOST); 10 –tread symbol of speed; 11 –loading index; 12 –designation radial all-metal cord tyres in English “Radial all steel”; 13 – assignment of the tyre for in English “Off the road”; 14 –tread pattern code. * The norm of layer conditionally means strength of a framework and allow to define limits of a permissible load and other operating parameters according to standard documents. At the same norm of layers the actual number of layers of a framework can be various depending on strength of an applied cord (for example PR-58). 6 ** Strength index. For radial tyres the index of strength or a norm of layers is indicated by two asterisks. Conformity of norm of layers for diagonal tyres and an index of strength for radial tyres are reduced in tab. 1. Table 1 Designation Norm of layers for the corresponding Designation of an index of strength of tyres sizes of tyres of a diagonal construction or norm of layers for radial tyres 21.00R35 To 44 24.00R35 To 48 27.00R49 To 54 33.00R51 To 64 40.00R57 To 74 *** The order number should consist of four digits from which first two specify an order number of week of year of the manufacture, two the subsequent - last two digits of year of manufacture. Example: 0508 Where 05 - week of year; 08 - year of manufacture; Bel - the manufacturer index; 3216 - article order number; On tyres additional designations, for example for tyres with the directed tread pattern a directional signal of rotation in the form of an arrow can be written. The tyres intended for export to areas with a tropical climate and made under the separate order, should have the distinctive identification mark - an inscription "Tropics" (TROPICS) or "North" (THE NORTH), deposited by special tool. On the case of elaboration for the tyre of the certificate of conformity on the tyre the sign. 2.2 Tubeless tyres for dump trucks of big and especially a big weight lifting capacity at storage, transportation and holding of cargo handling operations should be in the packaged aspect. At tubeless tyre packing the protective board boot is used. The clearance between sides of a tyre cover should be fixed a clamper. Ring gaskets insert to a tyre cover and fix in it. 2.3 The set of the tyre includes the tyre and three ring gaskets, "The Instruction on transportation and storage of tubeless tyres" (the Application 1). 3 Cargo handling operations and transportation of tyres 3.1 Cargo handling operations and transportation of tubeless tyres should be made so that not to suppose damage of sides of the tyre. 3.2 Lifting and transportation of tyres by a loader with flat captures are executed for external perimeter, not making damage to layers of rubber (see Appendix A). It is forbidden: to enter flat captures of a loader inside of the tyre. 3.3 Loader transportation only one tyre with width of a cross-section of 27 inches and more inches of an inclination towards a loader is authorized. The loader should have the dowel of round section in diameter not less than 150 mm. 7 3.4 At execution of cargo handling operations by means of the crane tyres than 140 mm and not less than 6 meters should be manufactured length by a soft flat tape sling of sufficient strength, width not less. It is forbidden: use for tyres lifting steel ropes and chain slings, a hook for side, for a cord of rope the accident protection device of side or wire rope, applied during transportation by rail. 3.5 Tyres are transported by any kind of transport according to rules working on everyone mode of transport. 3.6 At transportation by open cars and platforms over 5 days of the tyre should be protected from effect of the sun and moisture by a canvas cloth or a polyethylene film. 3.7 At seating of tubeless tyres on vehicles the conditions eliminating a strain of sides and side walls of tyres should be ensured. 3.8 At transportation of tyres by rail they must be placed vertically (except tyres of the size 40.00-57; 46/90-57). The fixation of tyres is carried out by means of the wooden blocks enclosed under a tread from two sides and fixed by a strand. Tyres of the size 40.00-57; 46/90- 47 are placed on a platform horizontally and fixed by a metal strand. 3.9 It is forbidden: transportation of tyres and ring gaskets together with mineral oil, acids, alkalis and other substances destroying rubber.