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Nokian Heavy Tyres
General information

General information

Product catalog summary

Overview: The Nokian Heavy Tyres Technical Manual provides detailed information on tyre solutions for extreme conditions across various sectors such as forestry, farming, municipal contracting, and transportation. It includes guidance on tyre selection, inflation pressures, and accessories to ensure optimal performance and reliability.

General Information:

Testimonials: User experiences highlight the reliability and efficiency of Nokian tyres, particularly with the Tyre Pressure LED warning system that alerts users to critical pressure drops.
Tyre Markings: Descriptions of tyre markings include section width, construction type, load index, and speed symbols, along with a classification of tread types for different applications.
Tyre Structures: Differences between radial, diagonal (bias ply), and bias belted tyres are explained, focusing on construction and stabilization features.
Inflation Pressure: Emphasizes maintaining correct tyre inflation pressure to prevent damage and ensure longevity, with a diagram showing the relationship between inflation pressure and air temperature.
Accessories: Discusses non-skid chains and other accessories like tracks, tyre pressure drop warning systems, rims, tubes, and valves, highlighting the importance of proper chain installation to avoid excessive tyre wear.

Key Recommendations:

Regularly check tyre inflation pressures, especially in varying temperatures, to maintain optimal performance.
Use wider tyres instead of reducing inflation pressure to improve machine footprint on soft soil.
Inspect and properly install non-skid chains to prevent tyre damage and ensure effective operation in challenging terrains.

Technical Manual Overview: The document provides technical information on Nokian Heavy Tyres, focusing on accessories such as tracks, tire pressure systems, rims, and their specifications. It includes guidelines for selecting and maintaining these components to ensure optimal performance and safety.

Tracks: Emphasizes selecting the correct track type for specific tire sizes and tread designs, with a table of recommended inflation pressures for various tire sizes when using tracks.

Tire Pressure LED™ System: Introduces the Tire Pressure LED system for monitoring tire pressure, outlining benefits such as reduced maintenance and prevention of tire break-ups, with instructions for installation and use.

Rims: Provides detailed information on rim markings, types, and standards, explaining differences between wide well-base and flat-base rims and the importance of using rims that meet industry standards.

Standards and Recommendations: References standards organizations like TRA, ETRTO, JATMA, and STRO for tire and rim compatibility, stressing the importance of consulting manufacturers to confirm rim and wheel strength for intended services.

Forestry and Agricultural Rims: Discusses specific recommendations for forestry and agricultural rims, including reinforcements and knurling to prevent tire slippage, and highlights the advantages of tubeless forestry rims.

Inspection and Maintenance: Provides guidelines for inspecting rims using mandrel and contour gauges to ensure proper fit and prevent damage, specifying tolerances for radial and lateral run-outs in agricultural and industrial use.

Mandrel Gauge Specifications:

The tolerance for the mandrel circumference is +/-1.2 mm.
Under-swing on circumference accelerates rim wear and can cause tyre rotation or bead chafing.
Exceeding circumference can damage the tyre during fitting.

Tubes:

Tubes may fit multiple tyre sizes, indicated by combination size designations.
Ensure tube size matches tyre size before installation.
Proper mounting with dual inflation and talcum powder reduces premature tube failure risk.
Improper lubricants can cause rim slippage and valve damage.

Ground Pressure Comparison:

Tyre diameter and width affect the contact area size.
Diameter increase impacts machine mobility more than width increase.
Ground pressure values vary with operating conditions but are useful for performance comparison.

Load Capacity and Inflation Pressure:

Correct inflation pressure for tyre 650/65R 26.5 is 2.8 bar (41 psi) for a load of 7000 kg at 40 km/h.
Maximum speed for tyre 650/60 R 34 is 30 km/h with a load of 10,000 kg and 4.0 bar (58 psi) inflation.
Minimum inflation pressure for road use is 2.8 bar (41 psi) and for field use is 1.6 bar (23 psi) for tyre 710/55R34 with a load of 7000 kg.

Limited Warranty:

Warranty covers defects in materials and workmanship for three years from purchase or five years from manufacture.
Exclusions include normal wear, misuse, racing, faulty mounting, and damage from accessories.
Warranty is void if tread depth is below legal requirements.

Limited Warranty Overview: Nokian provides a limited warranty for its tyres, requiring customers to report defects within 14 days of discovery. The defective tyre must be returned to Nokian or an authorized dealer promptly.

Liability and Replacement: If a tyre is found defective and covered by the warranty, Nokian's liability is limited to providing a new tyre, with the customer paying the difference based on remaining tread depth.

Additional Costs: Nokian covers mounting/dismounting costs only as required by local consumer protection laws. Liability for studding is included if it complies with local laws and is performed by an approved third party.

Exclusions: Studs are not covered by the warranty. Component product warranties apply to defects in materials and workmanship.

Force Majeure: Nokian is not liable for warranty obligations affected by force majeure events such as war, natural disasters, or governmental acts. Liability is suspended until such events conclude.

Limitations: Nokian's liability is strictly limited to the terms outlined and does not cover indirect, incidental, or consequential damages, including loss of business income or inability to use the tyre.

Catalog excerpts

Nokian Heavy Tyres Technical manual / General information General information Nokian Heavy Tyres is passionate in developing high quality solutions for the most extreme conditions found in forests, modern day farming, municipal contracting, transportation terminals and underground applications. In addition to tyre and supplementary item information, this manual focuses on the special necessities and requirements in each product category. The forestry section, for example, has a detailed guide on the right tyre and inflation pressure choice by application. This technical manual will be your tool in finding the right tyre for your work, with a promise on carefree working hours. General information includes: 2.1 Testimonials 2.6 Ground contact pressure comparison 2.2 Tyre markings 2.7 How to use load capacity tables? 2.3 Tyre structures 2.8 Limited warranty 2.5.3 Tyre pressure drop warning system

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Photo: Sandvik

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Nokian Heavy Tyres Technical manual / General information / Testimonials / Kone-Rauhansuu Ltd Red giant in wolves’ nest Jari Pinomäki, foreman, Kone-Rauhansuu Ltd Tyre Pressure LED pressure watch adds reliability and efficiency to working hours Pulp wood falls down. Forestry machine leaves behind a row of neat stacks. Intermediate felling is under way in Yläne, Pöytyä in southern Finland. Jari Pinomäki sits behind the wheel of Valmet 901.4 harvester. The new machine was fitted with wide Nokian Forest King F tyres mounted on a 22.5” rim. This was to make the crane reach even further. – Tyres should...

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Nokian Heavy Tyres Technical manual / General information / Tyre markings Tyre markings Tyre markings Manufacturer or brand name Tyre section width (mm or inches) Warning / max. inflation pressure in seating beads Aspect ratio Construction (R = radial, - = diagonal, B = bias belted) Production date week/year -code (14th week, year 2010) Construction type Commercial name or identity Tubeless (TL) or tube type (TT) Tread classification code Load index (max. load/tyre) Speed symbol

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Nokian Heavy Tyres Technical manual / General information / Tyre markings Tyre classification codes Optional marking TRA Code Tread type Tread type Agricultural tractor drive wheel tyres Loader and dozer tyres (Front-end loaders and dozers) Regular service (tread) Traction regular Rock regular Sprayer / spreader service Rock deep tread Cane and rice service (deep tread) Rock extra deep tread Flotation service (shallow tread) Smooth deep tread Industrial service (construction application) Smooth extra deep tread Agricultural tractor steering wheel tyres (non-traction pattern) Compactor tyres Industrial...

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Nokian Heavy Tyres Technical manual / General information / Tyre markings LOAD INDEX The LOAD INDEX (LI) is a numerical code associated with the maximum load a tyre can carry. LI Examp le 157 A8 a tyre c an carry m aximum 4125 kg /9 at the m 100 lb a speed o ximum f 40 km /h / 25 m ph.

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Nokian Heavy Tyres Technical manual / General information / Tyre markings UNITS Quantity Other units 1 bar = 100 kPa 1 pound per square inch (p.s.i. or lb/in2) = 6.895 kPa 1 kg/cm2 = 98.066 kPa SPEED SYMBOL The SPEED SYMBOL (SS) indicates the maximum speed at which the tyre can carry a load corresponding to its Load Index. SS pictogram Marked on both tyre sidewalls Explicts the maximum inflation pressure not to be exceeded for bead seating during tyre mounting. example) must be the same as specified by the tyre The value of inflation pressure (2.5 bar in the

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Nokian Heavy Tyres Technical manual / General information / Tyre markings PRESSURE UNIT, Conversion table kPa * Values in p.s.i. and kg/cm2 rounded to the nearest practical unit.

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Nokian Heavy Tyres Technical manual / General information / Tyre structures Tyre structures Radial Tyre The tyre carcass is stabilized by an inextensible circumferential belt. The ply cords are laid substantially at 90° to the centerline of the tread. diagonal (or bias ply) tyre The ply cords are laid at alternate angles substantially less than 90° to the centerline of the tread. Bias BelteD The tyre carcass is stabilized by an inextensible circumferential belt. Tyre structure of diagonal tyre.

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Nokian Heavy Tyres Technical manual / General information / Inflation pressure Inflation pressure Choosing the right inflation pressure Maintaining the proper tyre inflation pressure The inflation pressures of tyres should be checked carefully at regular intervals. Perform a visual check daily and repeatedly when operating. A slow leak can cause damage to the tyre sidewall or lead to tube failure before the under-inflation can be felt in the handling of the machine. Repairable damage should be repaired immediately in order to help obtain regular tyre life. When operating machinery in winter conditions,...

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Nokian Heavy Tyres Technical manual / General information / Accessories

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Nokian Heavy Tyres Technical manual / General information / Accessories / Non-skid chains Non-skid chains Non-skid chains Nowadays, the general tendency is to work increasingly without chains. This is turn places additional demands on forestry tyre selection in order to ensure access to difficult terrain while, at the same time, minimising ground disturbance. In practise, however, there are situations when the use of chains cannot be avoided. In such cases, it is important to pay attention to some basic considerations. Use of chains Before installing new chains, it is recommended that they be...

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Nokian Heavy Tyres Technical manual / General information / Accessories / Tracks Recommended inflation pressures when using tracks Tracks Track manufacturers give their recommendations in slightly Tyre size different ways. The practice, that is becoming increasingly common, is where track manufacturers specify their products according to the tyre manufacturer, the tread design and the tyre size. The minimum requirement is that the track manufacturer provide the tyre size and the tread design for each track type. When acquiring tracks, it is extremely important for the user to select the correct...

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