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. 3.10 Tires transported at environment temperatures more low than minus 40°C, should be preserved from mechanical effects.

4 Storage of tyres

4.1 For prevention of warning new and serviceable tyres should be stored in the dry, cool location, protected from effect of solar rays and moisture. To store tyres it is necessary in a tilt position with a bearing part on a strong rack or wall. The pitch angle between the tyre and the horizontal surface should be 60-70 degrees. For prevention of displacements from two sides of the tyre it is necessary to place wooden blocks. 4.2 At storage of tyres out of a location they should be covered by canvas cloth or another light - and a moisture-resistant material. The common service life of tyres without protection taking into account time of transportation of tyres from the manufacturer should not exceed 2 months. 4.3 It is not possible to remove clampers and a protective board boot from the new tyre till the moment of its mounting on a rim it. 4.4 At long-term storage in order to avoid nonreversible deformations it is necessary to turn 1 time in two months tyres, changing the point of contact with the earth fulcrums on the opposite. 4.5 For deformation prevention the storage of tyres in stacks in horizontal position is forbidden. 4.6 It is necessary to store the mounted tyres at an internal pressure of air 80-100 кPа in horizontal position. 4.7 Storage of tyres and ring gaskets together with combustive-lubricating materials and chemicals (acids, alkalis, etc.), destroying rubber is forbidden, and also is closer than one meter from heating devices. 4.8 At tyre storage it is recommended to do group by following signs: - New, not mounted; - Dismantled, applicable to the further exploitation; - repaired; 4.9 Before sending on storage of the dismantled and applicable tyre to the further maintenance it is necessary:

8 - To delete the stones which have stuck in a tread and other articles; - To repair (if necessary) local damages; - To attach a label to the tyre with the indicating of its run, remained tread depth, garage number of the car from which the tyre is removed. 4.10 Places of storage of tyres should be arranged by primary fire extinguishing means.

5 Mounting and dismantle of tyres 5.1 Rules of mounting and dismantle 5.1.1 Assembly and dismantling operations are carried out on tyres mounting site according to instructions of the Belarus car factory or foreign firms with qualified personnel by means of the special equipment and tools, namely: - wheel dismantle installation; - Hand tool set. 5.1.2 Tires and the thickening rubber rings for mounting, should be pure and dry. 5.1.3 Base of a rim, demountable board edges, demountable landing ring, spring key ring should be without strains and damages, are cleared of a rust and dyed. 5.1.4 At tyre mounting on a rim it is necessary to be careful, not to suppose damages of sides of the tyre, a ring gasket and the elements of a rim ensuring impermeability of joints. The tyre in assembly with a rim is presented on Figure 2.

Fig. 2 The 1-tyre, 2, 10-ring gaskets 3 - key ring of a wheel tread, 4-rim, 5-landing ring, 6- bead ring, 7- valve stalk, 8-valve, 9-nut, 11- valve case

5.1.5 For preparation and holding of installation works it is necessary: - To remove packaging and to make an external examination of the tyre about detection of damages; - External examination to check up a condition of a rim and its details, to clear them of a dirt and a rust. With special carefulness it is necessary to clear grooves for thickening and key rings. The details having damages, cracks, strains, it is necessary to substitute. 5.1.6 Mounting and dismantle of tyres should be manufactured on the stand (figure 3), ensuring smooth and a loading uniform distribution on a sprocket detail.

9 Fig. 3 Tyre mounting stand for mounting and dismantle of tyres: 1 - rack; 2 - hydraulic actuator; 3,14 - nut; 4 - basic rib; 5 - supporting ring; 6 - mobile thrust blocks of the upper beam; 7 - upper thrust block; 8 - upper beam; 9 - pump station; 10 - lower thrust block; 11 - support; 12 - lower beam; 13 - anchor bolt; 15 - base, 16 - tyre.

Tyre mounting on a rim is executed in the following sequence: - At the removed upper beam place a wheel tread on basic platforms of ribs and to put on it a bead ring; - To put on a rim the tyre and to impose on it the second bead ring; - To place inside of sides of the tyre a landing demountable ring; - To grease a new ring gasket with a mixture of silicone fluid or a soap solution and to lay it on a rim butt; - To lay a key ring; - To position the upper beam on a rod of an actuator and to stop its gripper; - pressure by means of the stand a demountable landing ring together with a bead ring below a groove on a rim under a ring gasket; - To lay a ring gasket in a groove; - To position a key ring in a groove of a rim and, having convinced of its correct landing to remove effort from a landing ring, having assigned the upper beam in the upper position. At tyre mounting on a rim it is necessary to observe the big caution in order to avoid damage of sides of the tyre, a ring gasket and the elements of a rim ensuring impermeability of joints. It is forbidden: - To use the ring gaskets having any imperfections; - To use a holes for valve for slinging of rims; - To throw a rim and its details; - To use plugs, plugs and other accommodating, not allowing to measure an air pressure in the tyre; - To make the technological operations connected with heating of a rim and its details (welding, kerf, purification, etc.) when the rim is in assembly with the tyre; - To use the ring gasket, which was used before. 5.1.7 Tire inflation by air is executed using the tyre mounting stand with the fixed press device on a rod of the power cylinder or on a site having a special protection, providing the safety of the working personnel in case of failure of a key ring at wrong mounting of tyres, an air hose at tyre inflation, etc. Inflation is carried out in following order:

10 - Preliminarily the tyre is pumped up to pressure of 70-80 кPа and correctness of assembly of the tyre on a rim is checked; - For security of a dense gapping of tyre sides to a shelf of a rim the tyre is pumped up to the pressure, in 1,2-1,25 times exceeding working pressure for the tyre and is used within 10-15 minutes; - The air pressure in the tyre is reduced to the recommended working pressure and the tyre is checked on impermeability. 5.1.8 The test of joints of a rim in assembly with the tyre is executed in the following sequence: - The wheel is placed in a horizontal position by a key ring up and in a groove of board edge the soap solution is filled in. Impermeability of the second side is checked similarly, but the wheelis placed by a key ring downwards. Impermeability of joints valve-rim and the valve chamber-valve is checked with use of a soap solution. The definitive estimation of impermeability of a wheel in assembly with the tyre is executed by a vacuum gauge on pressure decay during 24 hours. Pressure decrease is not supposed. In case of pressure drop detection in the tyre it is necessary to determine and eliminate the reason. After tyre inspection on impermeability the pressure in it drops to 80-100 кPа and the tyre is ready for installation to the car. After fixing by all nuts on a hub it is pumped in to working pressure. 5.1.9 Tire inflation is carried out by means of a hose pipe having a special tip, which ensures pressing a needle of a valve core for free receipt of air in the tyre. 5.1.10 Dismantle of the tyre from a rim is carried out on tyre mounting stand in the absence of a pressure in the tyre. Operation is executed in the following sequence: - To position thrust blocks 7, 10 (See fig. 3) on an hydraulic actuator and the lower beam. On the lower thrust blocks 10 to install a supporting ring 5; - To position a rim with the tyre in assembly on basic platforms of ribs 4 key base of a rim in the upper position; - To position the upper beam on an hydraulic actuator rod, to stop it using a catching device and, displacing the upper beam downwards, by means of mobile thrust blocks press a landing demountable ring before discharging of grooves under key and thickening rings; - To remove key and thickening rings from grooves, leaving them at the stand; - To fix the rim by thrust blocks 7 so that thrust blocks did not support external diameter of a rim; - Displacing the upper beam up to press together by means of the lower thrust blocks 10 and a supporting ring 5 through the lower bead ring of the wheel the lower side of the tyre to an oversize of a landing ring together with the lower side of the tyre from a rim; - Make free the upper beam and a gripper of the upper beam to take the tyre with landing demountable, board, key and thickening rings and to remove from the stand by means of a load mounting device; - To position thrust blocks 7 so that thrust blocks supported external diameter of a rim on a value of 4-5 mm; - To position the tyre with a landing demountable ring on mobile thrust blocks 7; - To position the upper beam, to stop it and press by means of mobile thrust blocks 6 bead ring, having pressed together thus side of the tyre from a landing demountable ring; - To remove a landing demountable ring from the stand and, having moved mobile thrust blocks 7 to stop a rim; - To remove the tyre with a bead ring from the stand; Before removal of dual (rear) sprockets it is necessary to evacuate the air from both tyres.

11 It is strictly forbidden the removal of wheels with any residual pressure!!! For protection of valves from pollution and damages on valves there should be placed a metal, rubber or other reliable safety caps. 5.1.11 At temperature of the tyre surface more low than the minus 40ºС is forbidden its mounting on a rim, dismantle and installation on the car. For execution of these operations is necessary to place the tyre a location and to start execution of the enumerated operations after reaching of temperature of the tyre close to an ambient temperature. The air temperature indoors should be not more low than minus 30ºС. 5.1.12 Rules of storage for dismantled, applicable to the further utilization, retreaded tyres are similar to rules for new tyres.

6.Order of acquisition by tyres of dump trucks large and super large weight-lifting capacity

6.1 For obtaining of a maximal efficiency of use of tyres it is necessary to complete rear axles of dump trucks of big and especially big weight-lifting capacity with tyres of one standard size and one model.

Installation of tyres of various models on a front axle is forbidden.

Additional completing of dump trucks of large and super large weight-lifting capacity tyres, instead of gone out of exploitation, is carried out with their selection according to their external diameter. The difference in dimensions of tyres should not exceed the meanings given in th table 2.

Table 2 Designation of The possible difference of sizes in mm tyres External diameters Length of a circle 18 21 21 24 Less than 11 Less than 35 18.00R25 21.00R33 21.00R35 24.00R35 24 27 31/90-49 33 36/90-51 Less than 14 Less than 44 40 46/90-57 27.00R49 33.00R51 40.00R57

12 External diameter of the tyres, which are mounted on a rim and have been pumped up to working (recommended) pressure, is defined longwise circles by measuring with a roulette on external diameter at the cap centre. In case of installation of the coupled tyres of different diameters the tyre greatest diameter will be overcharged, that will lead to significant drop of its life cycle. Dimensions of the tyres mounted on an dump truck, may be checked up as follows: - To be convinced, that in checked tyres internal pressure corresponds to the standard; - By the application of an elbow to two coupled tyres (fig. 4) or a cord tension between extreme tyres (fig. 5) to check up the conformity of their diameters.

Fig. 4 Fig. 5

6.2 Installation of the coupled tyres of radial and diagonal constructions is forbidden. 6.3 For provide the traffic safety it is forbidden to use on the front axle of autodump trucks the tyre with the repaired local damages and repaired by deposition of new tread.

7 Modes and conditions of tyres exploitation

7.1 The main factors which observance defines economic efficiency of use of tyres are the next: - Loading on the tyre (Q, t): - The maximum supposed speed of an dump truck travelling; - Middle exploitation travelling speed of an dump truck (V с.e., km/h); - Magnitude of internal pressure in the tyre (Р, кPа); - Maintenance operation of an dump truck and tyres; - Condition of roads, faces and dumps. Non-observance of recommendations about one of factors inevitably gives in the result the accelerated deterioration of tyres and their premature exit out of operation, what calls essential increase in cost of transportations. 7.2 Radial load on the tyre of a loaded dump truck should not exceed the nominal value specified in the specifications and technical documentation. In order to avoid an overload of tyres of separate positions in a body it is necessary to place a material uniformly (fig. 6) according to the passport of loading developed by the enterprise-consumer of tyres taking into consideration mountain-geological particularities of open-cast mines and open mines.

13 Fig. 6 Х - it is wrong, O- it is correct.

The consumer makes monthly an evaluation of operation loading on a sampling basis or together with the supplier by weighing (a load cell, reweighing, mine-surveyor measuring, etc.) loaded dump trucks on 10 % of cars of each version or other weighing. Results should be confirmed by acts. Excess of maximally permissible load on the tyre result in reduction of its life cycle because of thermal and deformation collapses, intensive tread wear and increase in mechanical damages. Dependence of life cycle of tyres on magnitude of loading is presented on fig. 7

Overloading Loading life cycle of tyres Fig. 7 For correct use of tyres, it is necessary to observe following 5 points with assistance of 5 experts presented in tab. 3. Table 3 The factor Responsible 1. Correct intrinsic pressure in the tyre The driver 2. Determined loading The excavator operator 3. Foreseen travelling speed of the car The driver 4. Correct maintenance of the car The mechanician 5. Roads in full order for exploitation The road workers

As the basic technical characteristics of operation capability of career tyres it is useed an index – operation productivity ТКH of "Tons-km/hours" which is calculated using the formula:

ТКPH = Qm. x Um.e.s. Where: Qm. – a normal load on the tyre, kg; Umes – Middle exploitation speed of an dump truck, km/h. Qm. = 0,5 (Qe. + Qch.) Where: Qe. – loading on the tyre of an empty dump truck, kg; Qch. - loading on the tyre of a loaded dump truck, kg.

14 Um.e.s. = 2L х n t Where: L – transportation distance, km; n - number of runs; t - the total time of an dump truck work in hours.

Meaning of index ТКPH for an ambient temperature above plus 38ºС should be modified by the formula:

ТКPH = ТКH n. ______1 + (Ta.-Tn.)-0,0096

Where: TKPHn. - nominal index of ТКH; Тa. – an actual air temperature, ºС; Тn. – a nominal air temperature for nominal index ТКH, ºС.

7.3 Middle speed of work is determined for a labor shift by division of the common operating time in kilometers on the common duration of shift in hours. 7.4 Middle working speed of movement of dump trucks for shift and transportation distance in the conditions of open-cast mines should not exceed the meanings specified in working standard documents on the tyre (GOST, technical specifications). Travelling speed on turning movements: - For exclude the influence on tyres of critical side forces, on turning movements with the minimum radius of round R, admissible travelling speed U, should not exceed speed specified in tab. 4: - Table 4 Admissible travelling speed R, m 15 50 90 140 200 270 350 550 U, km/h 8 15 20 25 30 35 40 50

Travelling speed of dump trucks BELAZ on technological roads depending on flatness of a road cloth on 10 m of road, km/h is specified in tab. 5:

Table 5 Class of roughness Height of roughness, cm 3-5 6-10 11-15 16-20 21-25 26-30 More than 30 1-2 pieces 42 30 22 17 11 5 2 More than 2 pieces 42 28 20 15 9 4 2

The example of determination of TKPH for the tyre 33.00R51

Main parameters of BelAZ-75131 Vehicle capacity, t - 130 Mass (without charge), kg - 105000 Mass with complete charge, kg - 235000

Distribution of mass of the equipped dump truck on shafts in % is presented in tab. 6.

15 Table 6 Distribution of mass of the Without a weight, % With a weight, % equipped dump truck on shafts Front 47 33 Rear 53 67

Loading on the tyre is presented in the table 7. Table 7 Loading on the tyre, kg empty charged Front axle, kg 26723 38775 Rear axle, kg 12888 39360

Calculation of TKPH Qm. = 0,5 (Qem. + Qch.) Qm. = 0,5 (26723+39360) = 33040 kg

Middle operating speed of an dump truck for a working day should not exceed the meanings given in table 8. Table 8 Environment temperature, 16 and 20 25 30 35 38* 40 45 °С low Middle operating speed of 19,0 18,5 17,5 17,0 16,5 16,2 16,0 15,0 an dump truck, km/h *) Meaning of an index according to which the working productivity is determined.

Um.e. It is taken equal to 16,2 km/h

ТКPH = 33040 х 16,2 = 535 t.km/h

At standard definition of ТКH, the concrete traffic diagram by a self-contained route, the time of working day, quantity of runs, and the total time of work are determined. Then, the middle operating speed of dump truck Um.e. is determined, which is used in calculation. For temperature definition in tyre inside layers it is necessary to make tread drilling according to the schema of temperature measuring points of disposition, for example in the tyre 33.00R51 (fig. 8).

16 Fig. 8 7.5 Internal pressure in the tyre. 7.5.1 Internal pressure in the "cold" tyre is the standard pressure recommended by GOST, technical specifications for tyres when the tyre temperature is equal to an environment temperature. Standard meanings of internal pressure in the "cold" tyre should correspond specified in working standard documents on tyres (see tab. 10, 11). 7.5.2 Pressure should be checked on "cold" tyres. 7.5.3 Cap executes a role of an additional valve, therefore it should be all time placed on the valve. 7.5.4 During exploitation the tyre pressure can raise on ~ 20 % owing to tyre heat that is supposed by a tyre construction, therefore to regulate pressure in "warm" tyres it is forbidden. 7.5.5 It is necessary to avoid not completely pumped or completely collapsed tyres, this will produce their destruction.

17 7.5.6 If pressure in tyres is regulated indoors in view of very low temperature outdoor of room, it is recommended to do this procedure by the following technique: - To determine the difference between the temperature inside and outside; - To calculate demanded pressure with the help of the graph (fir. 9); - Accordingly to increase pressure. The graph for pressure adjusting Increase Pressure, % 20

18

16

14

12

10

8

6

4

2

0 0 5 10 15 20 25 30 35 40 45 50 Temperature, °С Fig. 9

7.5.7. An incorrect pressure can lead to uneven wear, therefore it is recommended the following steps to minimize uneven wear: - Always to pump in tyres to recommended "cold" pressure. 7.5.8 Non-observance of norms of internal pressure in the tyre results in the reduction of a period of its service because of thermal collapse, bruises, intensive tread wear, etc. (tab. 9). Table 9 Low pressure in the tyre High pressure in the tyre 1. Tread separation, stratification (explosion) 1. The increased wear of the central part of a tread and the subsequent collapses of a framework because of reduction of a tooth contact with road. because of a increased heat generation. 2. Tearing up of cables and destruction (explosion) 2. Exfoliation rubbers of sidewall, break or of a framework in the presence of damages or tearing up of a framework because of an stratifications. increased deformation. 3. The non-uniform great wear on angles of a 3. Cracks at the base of tread bars, circular cracks tread because of an increased deformation. on the centre of a tread. 7.6 Maintenance operation of tyres. 7.6.1 During the maintenance operation of tyres following operations are performed: - Inspection of technical state of tyres, key rings, edges, valves, slide valves, presence of protective caps on valves, the work of stones evacuators;

18 - Measuring and correction of internal pressure in tyres. These operations, as a rule, should be executed at a corresponding category of maintenance of the car (ТО-1, ТО-2), but is not more rare than 1 time in 7 days. 7.6.2 Daily, before the work beginning drivers execute an external examination of cars for determine the technical state of tyres for provide the profitability of transportations and traffic safety. Classification of the basic defects and the technical state of tyres are presented in table 12.

Technical characteristics of large-sized and supergiant tyres Of a diagonal construction Table 10 Designation, tyre model The index name 18.00-25 35/65-33 21.00-33 21.00-35 24.00-35 ВF-76ЕМ FBel-283 ВF-166АМ Bel-5I Fbel-150 Number of layers 32 36 30 32 36 42 External diameter, mm 1615+25 1615+25 2100+32 1940 1990 2175 Width of a cross-section, mm 498+15 498±15 889±27 571 572 653 Mass of the tyre, no more, 345 345 1240 505 530 750 than, kg Е-4 Tread pattern type Е-3 L-4 Е-3 Е-4 Е-4 The pressure corresponding to a gross capacity on the tyre, 600±25 750±25 425±25 560±25 575±25 550±25 kPа Tread pattern height on the 35 35 70 37 50 58 deterioration indicator, mm Maximally admissible load on 8750 13000 21200 12000 13250 16500 the tyre, kg Maximal possible supposed 50 27 10 50 50 50 speed, km/h Working productivity 117 - - 160 204 234 (ТКPH), t.km/h

Designation, tyre model 24.00-49 27.00-49 31/90-49 33.00-51 33.00-51 36/90-51 Index name Bel-174 FТ-115 Bel-182 FТ- FТ- Bel-180 116АМ2 116АМ2 Number of layers 48 48 54 56 58 58 External diameter, mm 2543±38 2690±40 2694±40 3045±25 3045±25 3045±45 Width of a cross-section, mm 665±20 765±25 771±25 955 955 925±30 Maximally possible load on 36500/4000 21800 25000 27200 35500 35500 the tyre, kg 0* The pressure corresponding to 650 575 650 575 575 575/600* a maximal load on tyre,25кPа Maximal possible speed, km/h 50 50 50 50 50 50/25* Mass of the tyre, no more, 1200 1385 1400 2190 2190 2300 than kg Tread pattern type Е-4 Е-4 Е-4 Е-4 Е-4 Е-4 Tread pattern height by the 56 74 62 89 89 84 deterioration indicator, mm

19 Working productivity 277 355 360 492 492 520 (TKPH) at t.km/h

Table 10 Continuation Designation, tyre model The index name 40.00-57 46/90-57 FT-117 FT-117 FT-117М Bel-160 Bel-170 Number of layers 60 68 68 68 68 External diameter, mm 3575±53 3575±53 3575±53 3575±53 3575±53 Width of a cross-section, mm 1140±35 1140±35 1140±35 1175±35 1175±35 Maximal possible load on the 50500/5810 54500/5950 54500/59500 56500/61500* 56500/61500* the tyre, kg 0* 0* * The pressure corresponding to a maximal loading on the tyre, 500/580* 550/580* 550/580* 580/605* 580/615* ±25кПа Maximal possible speed, km/h 50/32* 50/25* 50/25* 50/25* 50/20* Mass of the tyre, no more, 3550 3550 3550 3600 3620 than kg Tread pattern type Е-4 Е-4 Е-4 Е-3 Е-4 Tread pattern height by the 96 96 91,5 76 91,5 deterioration indicator, mm Operation productivity 670 675 675 680 680 (ТКPH), in t.km/h *) – Admissible modes of exploitation (loading, pressure, speed).

Technical characteristics of large-sized and supergiant tyres Of a radial construction Table 11 The index name Designation, tyre model 21.00R35 24.00R35 27.00R49 33.00R51 40.00R57 Bel-112 Bel-122 Bel-132 Bel-102 Bel-162 Bel-150

External diameter, mm 2035 2175 2702 3020 3020 3562 Width of a cross-section, mm 590 653 737 950 950 1127 Maximal possible loading on 15000 19050 27250 40100 40100 60000 the tyre, kg The pressure corresponding to 560 700 650 690 690 650 a maximal loading on the tyre 25кPа Maximal possible speed, km/h 50 50 50 50 50 50 Mass of the tyre, no more than, 650 805 1368 2225 2225 3591 kg Tread pattern type Е-4 Е-4 Е-4 Е-4 Е-4 Е-4 Tread pattern height by the 59 59 65,5 82 82 88 deterioration indicator, mm Operation productivity 281 388 513 535 535 940 (ТКPH), km/h

20 Classification of the basic imperfections

Table 12 № Aspects of damages The reasons of damages Recommendations

1 The cuts which are not reaching Unsatisfactory condition of roads and To clean road and cargo handling Framework. Damage of cargo handling platforms. platforms. integument rubbers. Aggravating factors: To expand a carriageway. To reduce - high speed of movement; travelling speed, to check pressure in - Aberration from norm of a tyre tyres, to eliminate an overload. pressure; In due time to inspect tyres. - Overload. Removal of stones, nails etc. from the tyre for prevention of the further infiltration into the tyre. To continue the further maintenance of tyres. 2 The cuts reaching a framework. See Item 1 Cables are not damaged. See Item 1 To execute dismantle and tyre repair. To continue the further maintenance of the tyre 3 Cuts penetrating. See Item 1 Framework layers are damaged To do the dismantle and: -//- - Tyre repair if the sizes and damages are in supposed limits; - Change the tyre if the sizes of damage exceed supposed meanings. 4 Destruction of protective rubbers. -//- See Item 1 Destruction of pattern elements of a tread 5 Significant in the sizes -//- The further maintenance of the tyre destructions up to cables is not possible 6 Cracks protective and coating rubbers: - The small on the surface; Exploitation of tyres with a departure To observe norms of pressure in from the nom of an air pressure, tyres, to eliminate an overload. overloads, violations of rules of storage of tyres.

- Numerous, penetrating, Maintenance of tyres with a departure The further maintenance of the tyre is reaching a framework; from the norm of an air pressure, not possible. overloads, violations of rules of storage of tyres 7 Treadwear: - Uniform, premature to Loosening of tyre by cuts etc. at an To perform the operations specified extremely possible meaning unsatisfactory condition of roads. in item 1

Swelling of rubber at oiling by mineral To clear a stall and repair places of oil of stalls and repair zones. mineral oil.

Aggravating factors: To eliminate overloads of tyres, to - Overload; reduce travelling speed. - High speeds of movement of a dump The tyre is subject to placing out of truck. service at reaching of marginal deterioration.

- The one-sided The failure of the car connected with To check technical conditions an dump misfit of angles of an oversize and a truck. camber of sprockets, excess of Timely tyres switching.

21 meanings of cross bevels of roads. Wrong seating of a weight.

- The ramp Wrong resetting of an oversize of To check technical conditions of an sprockets, failure of brakes dump truck. The tyre is subject to placing out of service at reaching on by one of angles of magnitude of marginal deterioration.

- The spotty Hard braking, jamming of brakes. To eliminate failures. The tyre is subject to placing out of service at reaching of magnitude of extremely supposed deterioration in one or several "spots".

- increased centre of tyre top Exploitation of tyres with an increased To control thee pressure in tyre see pressure item 7.5 of "Guide …"). The tyre is subject to placing out of service at reaching of magnitude of marginal deterioration on the cap centre.

- Deterioration over the Absence of regular visual inspection of To carry out a daily inspection of tyres. permissible tyres The further use of the tyre is excluded. 8 Local tread separations, External cuts from stones. Control of recommended pressure blisters (for radial all- metal Moisture infiltration into a zone of and avoidance of excess of loading cord tyres) damage of an under tread layer. on the tyre. Non-observance of a recommended tyre The use of tyre, which specification pressure and loading excess. corresponds to service conditions. Regular inspection of tyres. Immediate repair of zones of damage for prevention of their increase. The further use the tyre is impossible 9 Bond liftoff of details in a Consequences of growth of cuts etc. To eliminate the reasons of origin of junction place, framework Aggravating factors: primary imperfections. stratification - Movement high speeds; Repair the roads - Overload; Further exploitation tyres is - High speed of movement. impossible 10 Tearing up of one or External cuts of the tyre. Maintenance of a condition of roads severallayers of a framework Driving with a high pressure in the Regular inspection of tyres. (diagonal, crosswise, Т and V- tyre, an overload. Immediate repair of a zone of damage shaped). Movement high speeds. at detection of initial cuts. Maintenance of a recommended tyre pressure and avoidance of an overload of a dump truck. The further use of the tyre is excluded. 11 Framework break. Driving with a low pressure or on The further use of the tyre is excluded. completely collapsed tyre, an overload.

12 Bubbles in hermetic layer, a High temperature in the tyre. The further use of the tyre is excluded. destruction of hermetic layer. 13 Damage of a board part of the Tyre installation on a rim is made out of To observe rules of transportation and tyre conformity with rules. A non-uniform assembly and dismantling operations, coating of a landing place on a rim (a to eliminate use of faulty rims and strain, rust, teases, cracks etc.). An overloads. overload of tyres. The tyre is subject to placing out of service at loss of tightness 14 Cut on sidewall a punching A bad road. Use of a recommended tyre pressure framework through or Breed jamming between the coupled and avoidance of an overload of a damaging it. tyres. dump truck.

22 Excessive deformation of the tyre on Accurate driving. sidewall as a result of its reduced Immediate repair of a zone of damage pressure. at detection of initial cuts. Excess of loading of a dump truck. The further use of the tyre is excluded. 15 Damage of the tyre to a place of Poor-quality repair. Execute of repair work according to the made repair. Misfit of a repair material. recommendations. Maintenance heavy conditions. Tyre exploitation on a rear position. To avoid heavy conditions of exploitation . 7.6.3 At detection of an intensive or uneven wear of a tread pattern and other aspects of operation imperfections of tyres it is necessary to determine the reasons of their origin and immediately to arrange for their elimination. 7.6.4 Tires rearrangement is recommended to be done at detection of technical necessity which is defined by the heads of enterprise. As the base for tyres rearrangement can be: - Tyre damage; - Tread pattern uneven wear; - Necessity of correct selection of twin tyres. 7.6.5 Tire pressure should be checked by a vacuum gauge having limits of measurement from 0 to 100 кPа and precision class 0,5 or 1,0 with scale interval 10-20 кPа. The quality of vacuum gauges work should be controlled according to the rules. 7.6.6 Inspection of pressure in the "cold" tyre - the tyre temperature is identical with an ambient temperature - and its finishing to the norm is necessary during maintenance operation ТО-1, (ТО-2)of the dump truck, but not more rare than once in seven days with an obligatory mark in the journal. 7.6.7 At pressure installation in the "cold" tyre in garage with the subsequent statement of a dump truck out of garage at 24 and more hours it is necessary (at departure from garage) to make correction α кPа to nominal value of a tyre pressure according to table 13, depending on a difference of temperatures ∆ t of the environment and of the garage. If the environment temperature is below of the air temperature in garage, the correction is taken over with a plus sign «+», above – with a minus sign «-». Table 13 Environment and garage 10 20 30 40 50 60 temperature difference ∆ t, °С Correction for nominal value 20 30 50 70 80 100 of pressure α, кPа

7.6.8 Inspection of pressure in a heated tyre is necessary every day before the beginning (after the termination) work at a not loaded dump truck with a mark in the journal. Pressure in a heated tyre should not exceed norms for a cold condition more, than on 110 кPа. If pressure in a heated tyre exceeds admissible, it is necessary to stop a dump truck, determine and eliminate the reason of pressure increase (an overload, excess of speed etc.). In a case if the reason is not determined, it is necessary to cool the tyre and check pressure in it on conformity to norm (in the cold tyre). To adjust pressure in a heated tyre is forbidden. Attention! During exploitation at increased deformations owning to driving with the reduced pressure in tyres, overflows of loading and a great speed the tyre can become explosive owing to framework destruction.

23 7.6.9 Before departure the driver is obliged to check up tyres, rims, pressure in tyres by means of a vacuum gauge or on the automatic monitoring system of pressure control in tyres (SCPT), presence of slide valves and safety caps. It is forbidden execute the measuring of pressure in the tyres having penetrating cuts reaching a framework, a blister. Such tyres are subject to immediate removal. 7.6.10 It is forbidden the work of trucks tyres of which have : - Wear of a tread pattern when the remained height by the deterioration indicator is equal 0 mm; - Tread separation and blister of coating rubbers irrespective of the sizes; - Framework break, framework stratification; - The cracks of a tread reaching of a cord; - Cuts, break-down with damage of cord layers of a framework; - Faulty valves and valve cores, and also valves without caps or with plugs; - Air pressure does not correspond to the determined norms (see table 2). 7.6.11 In order to avoid premature deterioration and bruises of tyres while in service the driver is obliged: - To begin dump truck movement continuously, not to suppose skid of wheels; - To avoid tripping-over on lumps of rocky breeds, acute subjects, and others; - Not use a hard braking at stops to avoid movement "sliding". 7.6.12 After parking of an dump truck more than 24 hours at an environment temperature of minus 40ºС and more low it is necessary in the beginning of work limit the speed to 5-10 km/h before heating of tyres. 7.6.13 At transit of super size dump trucks to new places of work it is necessary to fulfill following requirements: - The dump truck should be not loaded; - Before departure to check up internal pressure of air in tyres which is recommended to be raised on 12-14 % concerning standard meaning; - The maximum traveling speed on motorways no more than 50 km/h; - Through each 80 km of a path or 2 hours of continuous driving to do the cooling of tyres by adump truck stopping for 30 minutes, in each 4 hours of transit to do the cooling of tyres by an dump truck stopping at 1 hour. 7.6.14 Parking places of dump trucks should be the pure, not soiled by mineral oil and other substances destroying rubber. 7.6.15. Parking of cars in which tyres pressure not corresponds to the norm, and also parking at full load for a time more than two days is forbidden. At impossibility of unloading it is necessary to change a contact point of the tyre with the surface 1 time within 48 hours. 7.7 Requirements to roads 7.7.1 Performances of career roads should correspond to Construction norms and Rules. 7.7.2 Career roads, entrances to dredges and dumps should be in a good condition to avoid possible damage of tyres. 7.7.3 In the course of road maintenance operation it is necessary: - Regularly clean constants and service roads, loading and unloading platforms; - To carry out a necessary repair of injured sites, compaction of a soft surface and drainage of the flooded sites of roads by creation of drainage. 7.7.4 Add pour only the grinded rubble or gravel in the size no more than 50 mm. 7.7.5 During the winter period it is necessary to clear the road from snow and ice. For this aim it is recommended to use a mixture of calcium chloride and sodium chloride with norm of expenditure 30-40 gr/m2. 7.7.6 Principal types of refusals of tyres at an unsatisfactory condition of career roads and platforms are presented in table 14.

24 Table 14 № Technical state of roads and Aspect of refusal of tyres platforms. 1 Spilling of transported mountain mass Cut, break-down, framework tearing up in a cut place 2 Are badly planned, there are deep hollows. Uneven tread wear, tearing up of a framework owing to high inertial reactions at blows. 3 The width, radiuses of turning movements less Cuts, intensive uneven wear, thermal collapse of than admissible, slopes are long, value of the tyre. slopes is more than admissible.

8 Calculation of work of tyres

8.1 Calculation of monthly run new and retreated tyres should be carried on regularly for each tyre separately. New tyres should be calculated by factory numbers, retreated tyres – according to numbers given by the repairing enterprise. In a case of a loss while in service or repair of tyres of their factory numbers, it is possible give new numbers of garage numbers on sidewalls of tyres. The depth of the plotted numbers should not exceed 1 mm, and the height of 40 mm. 8.2 For everyone (including with a dump truck) tyre, new, restored or being in use a card of the calculation of working time (Application B) should be done. At the depersonalized aspect of the restoration in an calculation card the mark about presentation of the tyre for restoration (with the indicating of group of repair and the reference to documents for restoration) and then the card is closed. At surrender in not depersonalized aspect of repair and returning after restoration of this tyre in an enterprise, the operation of calculation proceeds in earlier acquired card. 8.3 Card is the basic form of the calculation of operation and repair of tyres and serves as the basic document at definition of run of tyres, their validity at the presentation of claims, etc. Filling of all columns of a card is necessary. 8.4 If the tyres placed on wheels of the car, within a month were not substituted by other tyres run of each tyre should correspond to actual run of the car for a month. If within a month the tyres have change the place or they were taken off exploitation, it is necessary to write in the calculation card the date, factory number of the tyre which, and also its actual run, the chang or removal reason and the remained height (average value) of a tread pattern. The remained height of a tread pattern is measured with a device certified by metrology service according to the wear indicator The tread wear indicator - the index which is a signal to end the exploitation of the tyre in the result of tread wear. The tread wear indicator is executed in the form of protuberances on a bottom of grooves. The average value of the remained height of a tread pattern is defined by division of the sum of meanings of three measuring into three.

25 9 Surrender of tyres on the regenerative repair and write-off in breakage

9.1 Tires with the worn out tread pattern and an efficient framework go to a tyre restoration enterprises with the accompanying list (Application D). 9.2 The selection of tyres for the restoration in places of a dislocation of transport is carried out with the assistance of the representative this enterprises by an agreement between them. 9.3 Visual inspection and definition of technical state of tyres for write-off is made by the commission on write-off of tyres which is designed by the order of the head of the enterprise. On each tyre shown to write-off the filled card of the work calculation of the tyre should be presented. 9.4 Classification of the basic imperfections and the conclusion about the technical state of tyres are executed according to the recommendations given in table 10 of the present "Guide..." 9.5 On all tyres, out of service, the Act about write-off of tyres (Application G) which is signed by the commission on write-off of tyres of the enterprise in which tyres were operated is made".

10. Manufacturer's warranty. Claims.

10.1 Manufacturer guarantees the conformity of tyres to requirements of the standard document on which tyres are made, at observance of service conditions, transportations and storages. 10.2 Guaranty period of storage of tyres – 5 years from the date of manufacture. The presentation of the claim for poor-quality production is manufactured according to "Regulations about delivery of products on amount and quality", confirmed by Decision of the Cabinet of Ministers of Belarus No. 285 of 26.04.1996 10.3 At the presentation of the claim the act claims (Application E) and a certified card of the calculation of operation of the tyre should be directed to the manufacturer. In addition to the claim act data on operation of tyres not less than for last two days of tyres work must be presented, including: - Exploitation conditions (quantity and length of transportations and amount of the runs executed on them, when the tyre has failed, the time of the dump truck work); - Modes of exploitation (loading, middle traveling speed of an dump truck, the pressure in tyre); - Characteristic of meteorological conditions. Defective tyres and conditions of their exploitation for all period are shown on request of the manufacturer. Period of claims examination is defined by the contract on delivery of tyres. 10.4 Guarantees don’t concern the tyres which have gone out of exploitation in the result of violation of rules of exploitation: - Mechanical damages or cuts influencing working capacity of tyres, tearing up from impulsive dynamic knocks, by stones and other foreign bodies; - Uneven wear because of wrong resetting of units and mechanical imperfections of the car which affect on working capacity of tyres, and also the imperfections called by violations of the instruction of driving; - Uneven wear and the refusals called by excessive or insufficient tyre pumping by air; - The refusals called by excess of loading on the tyre, specified in tables 10, 11; - The refusals called by aggressive substances, for example, by oil, lubricant, benzene,

26 etc.; - The refusals called by imperfections of wheel parts. 10.5 At an exit of tyres from exploitation not because of the consumer fault the supplier reimburses cost unused time of exploitation of tyres up to the time of guarantee work 10.6 At appearance of questions at issue between the consumer and manufacturer concerning quality or delivery of tyres, the consumer should address the claims in the System of arbitration.

11 Recommendations about repair of tyres

Repair large-sized and super giant tyres is supposed to be carried out according to engineering specifications on repair of local damages with equipment application "Type-top", ”Stalgruber” and domestic materials, similar variants (thus it is necessary to consult with the manufacturer of tyres) are possible. To repair the local damages of tyres with open and not open damages of a framework, a breaker and coating rubbers is possible when, the residual height of a tread pattern ensures an operating time not less than 1,5 thousand km. The maximum size of open damages is 250 mm. The next tyre is not subject to local repair: - Having more than two open damages, including earlier repaired; - With the damages located on distance less 400 mm from a heel of side; - With the open damages located on distance less of 1/5 lengths of a circle of a tyre; - With the framework layering which greatest size exceeds maximally admissible size of damage, or located on distance less than 1/5 lengths of a circle; - With a break or side collapse; - Being under a long-term influence of mineral oil or other substances calling swelling of rubber; - With ring destruction of a hermetic layer; - With visible indices of aging of rubber.

Repair of local damages of tyres will allow to raise the time of tyres using with not used resource of the tread, gone out of exploitation in the result of open and not open bruises in a zone of a cap of a tread and sidewall.

Appendix A THE INSTRUCTION On transportation and storage of tubeless tyres

Attention! TUBELESS TIRES Lifting and transportation of tyres Is forbidden To do by a loader with flat pitchforks to enter flat pitchforks of a loader Only by external perimeter or the round dowel in the tyre of a diameter not less than 150 mm

27 Slinging of tyres It is forbidden To use a soft tape sling slinging tyres by the cable and chain slings or a hook

To store tyres only in vertical position It is forbidden the storage of the tyres in stacks in the horizontal position.

The possible schema of loading and Possible scheme of loading and o unloading of tyres unloading of tyres of the size 27.00-49 of the size 40.00-57 by an external part and 33.00-51 by an external part

Appendix B

28 Card of the calculation of work of the tyre

The size and tyre model ______The total run of tyre, km ______A series and tyre number ______The manufacturer of the tyre ______Date of receipt of the tyre ______The enterprise ______

Mark Gara Tyre Tyre run The Techni Depth Shift, date The and ge posit On 1st day comm cal Tread, write- dump num ion of month on run state Mm off truck ber from of the reason model Mon Km the tyre 1 2 3 Disman Mount th beginn point point point tle ing ing of using 1 2 3 4 5 6 7 8 9 10 11 12 13

Head of the enterprise ______Accounting technician ______(Signature) ( name) (signature) ( name)

Mechanical engineer ______Driver ______(Signature) (name) (signature) ( name)

Appendix C

The journal of Pressure inspections in tyres

29 Mark and Measuring Tyre model Factory Tyre position Actual results Mark about the garage date number of the of pressure taken measures number of an tyre measuring, to put the dump truck кPа pressure in norm

1 2 3 4 5 6 7

Signatures:

Appendix D

ACT

About write-off of the tyres, which have gone out exploitation ______(enterprise) in the period from ______to ______200 __

The Tyre Factory Garage Positions Tyre run on The The reason size model number number in which Date positions in remain of escaping of the where the tyre which it ed of tyre the tyre was used Moun Disma worked also height of exploitation was ting ntle the common a tread used run, km at the moment of write- off, mm 1 2 3 4 5 6 7 8 9 10

Signatures: Responsible for the calculation of tyres

30 Appendix E

Accompanying List

On the tyres directed on ______(name of tyres restoring enterprise)

For restoration ______( name and the address of the enterprise which have submitted the tyres)

The size of tyres Factory number of the Mark about tyre take-over on Remarks tyre restoration 1 2 3 4

The head of a motor transport enterprise ______name, signature

The representative tyres restoring enterprise ______name, signature

Responsible for the calculation of tyres ______name, signature

Notes:

1. The accompanying list is made by the enterprise in two copies. 2. At acceptance of tyres on restoration the tyres restoring marks in the item 3 the date of restoration of each tyre. 3. One copy of the accompanying list remains on tyres restoring, another is given to the enterprise.

31 Appendix F

ACT On the new (repaired) tyre which has not withstood guarantee run, determined in the standard document on the tyre

1. The name of the enterprise which have presented the tyre on the claim ______2. The enterprise address ______

3. The manufacturer name (a factory executing repair of the tyre) ______4. Mark of the car on which the tyre was used ______

5. Data on the tyre presented to the claim

The size Tyre model Factory Mounting Dismantling Tyre Run, The cause of a tyre of the tyre number date date position Thousand failure km

The chairman of the commission of enterprise ______signature name

Members of the commission: 1. ______2. ______3. ______

32