Tyre Care

 

1. Inflation Pressure

The use of proper inflation pressure is the most important factor contributing to the satisfactory performance and maintenance of industrial tyres. Correct inflation pressure can be determined by weighing axle loads and then referring to the load/inflation tables shown for the tyre size. All tables give load per tyre.

Underinflation

Can cause damage to the cord body of the tyre. The continued abnormal flexing of the tyre causes premature failure of the tyre carcass.

Check Inflation Pressures Frequently

Inflation pressures should be checked regularly (at least every two weeks). For accurate inflation use a special low pressure gauge which should be checked for accuracy at least once a year. Tyres should be tested when they are cold and before the machine is put into operation. A tyre that appears to have sufficient pressure when it is hot will be underinflated when it cools.

2. Use of Recommended Rims

The use of rims narrower than the recommended brings potential mounting problems because the rim shield or flange cover molded into most tyre designs tends to interfere with the seating of the tyre beads on a narrow rim. Once mounted on a narrow rim, the tyre rim shield applies undue pressure on the rim flange, with possible tyre sidewall separation or premature rim failure at heel radius. On a narrow rim the tread is rounded. As with overinflation tyre treadwear will be concentrated in the centre area of the tread and traction in the field will be reduced. Always use the recommend rim.

3. Valve Damage

When valves are torn off the tubes, it indicates a slippage of the tyre bead on the rim or an improper centering of the valve rim. Slippage of the tyre bead on the rim may be caused by:

• Low inflation pressure.

• Improper seating of the bead on the rim.

• Excessive use of a lubricant on the bead or rim when mounting the tyre.

• Run below tolerance

4. Tyre Construction Mixing

Mixing radial and bias tyres on the same axle should be avoided at all times. It can lead to instability and cause mechanical damage. In certain countries this practice is even legally prohibited.

5. Grease and Oil

To avoid damage of the rubber, do not allow tyres to come into contact with grease or oil. After using the tractor in spraying operations, wash any chemicals from the tyres.

6. Competent Repair

Tyres should be inspected for possible damage, particularly cuts or breaks that enter into or expose cords in the carcass. Damaged tyres should be removed promptly from the wheel and sent to a reputable tyre services station for full internal inspection and if possible permanent repairs.

7. Tyre Safety

Always use specialized mounting and demounting tools as specified by tyre suppliers.

Never attempt to unseat the beads of an inflated tyre.

Never re-inflate a tyre that has run flat or was seriously underinflated without removing it and checking for tyre, tube or rim damage.

Always remove the valve core and housing and completely deflate the tyre before servicing.

Never rework, weld, heat or braze rims. Whenever any work on rims has to be performed, make sure tyre is demounted first.

Always inspect valve cores for proper air retention. Replace damaged or leaky valves.

Never install tubes that have buckled or creased or use a tube in a tyre different from what is specified by the manufacturer.

Always inspect inside of tyre for loose cords, cuts, penetrating objects, or other carcass damage. Repairable damage should be repaired prior tube installation Tyres with non-reparable damage should be discarded.

Always inspect inside of tyre for dirt, liquids, or foreign material and remove this before inserting a tube.

Always use new valves and tubes in new tyres.

Always clean and inspect rim and check rim diameter corresponds to the tyre diameter.

Always lubricate with approved tyre mounting lubricant. Never use anti-freeze, silicon or petroleum-base lubricants.

Never exceed 2.5 bar (35 psi) inflation pressure for bead seating during tyre mounting.

Always use an extension hose with gauge and clip-on chuck so that operator can stand aside during inflation and be protected by an approved safety cage.

Never try to fit a tyre to a rim that does not exactly match the rim diameter. Example: 15 inch & 15.3 inch must not be mixed.