LOWLANDER HD MK2 & WIDEBODY MANURE SPREADER – INSTRUCTION & SPARES MANUAL
Page 112
7 TYRES AND WHEELS
7.1 TYRE AND WHEEL MAINTENANCE
Maintenance of correct inflation pressure is the basic essential factor in obtaining the best performance
and life from a pneumatic tyre. The air inside the tyre enables it to carry a load. It is only when the
inflation pressure is correctly matched that the tyre adopts its optimum cross-sectional shape and the tread
rests correctly on the road surface with the correct pressure distribution across its whole width, thus
allowing the sidewalls to provide the required degree of flexibility. Both performance and life of the tyres
will suffer if pressures are unsuitable so both over or under inflation ( or overload which has the same
effect ) are similary undesirable.
Underinflation results in excessive deflection which increases the heat generated by the tyre, this in turn
leads to its eventual disintigration. In addition the distortion of the casing will result in the lifting of the
centre of the tread, thus overloading the outer edges of the tread, producing rapid wear at those points.
Overinflation distorts the tyre’s casing, but in this case it tends to lift the outer edges of the tread off the
road surface and imposes extra load and more rapid wear on the centre of the tread. Owing to reduced
flexibilty the tyre will be more vulnerable to impact damage, ride quality will be impaired and the wheels
will be more liable to bounce which can result in skidding due to brakes locking.
Unlike cars on which tyre loads do not vary greatly it is not practicable to provide standard
recommendations. This is because tyre loading and operating conditions vary widely.
Remember that spreaders travel laden one way and unladen in the opposite direction, it is therefore
desirable to estabish a suitable mean pressure that mimimises both under inflation when loaded and
excessive over inflation when running light.
7.2 ROAD USAGE
Maximum gross combination weight is 31000Kg and maximum gross spreader
weight is 18290kg.
MACHINE WIDTH (metres) SPEED LIMITATION
WIDTH > 2.55 Max. 25 mph
2.55 > WIDTH ≤ 3.5 Max. 20 mph
WIDTH > 3.5
Max. 12 mph + Attendant
Police dispensation required
If in doubt contact your local authorities, where your machine will be operated.
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