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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

Photo: Sandvik

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...

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

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...

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.

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

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.

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.

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...

Nokian Heavy Tyres Technical manual / General information / Accessories

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...

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...