Alexander Dennis Trident 2, Operation Manual

Page: 47 / 52

47
Emergency Repairs
Tyre Pressures
The pressures quoted have been
determined to ensure an acceptable
compromise between ride comfort,
handling, and tyre life. Reduction of
pressures below those identified for
any given axle load is not permitted
unless agreed by the tyre
manufacturer.
An increase of up to 10% in front tyre
pressures may provide improved front
tyre life, particularly in urban conditions
where sharp corners or roundabouts
are frequently encountered. However,
this improved wear life may be
accompanied by a reduction in ride
quality.
Increasing the rear tyre pressures in
isolation is not permitted on rear
engined bus applications, as handling
could be adversely affected.
In case of doubt, reference should be
made to Alexander Dennis Guildford
Engineering Department or the
Technical Department of the tyre
manufacturer.
The table gives the nominal pressures
for max axle loadings for the vehicle.
Replacement Tyres
Replacement tyres should be of a
similar specification. Fitting tyres of a
different rating may affect accuracy of
speedometer readings, and plated
weight ratings. Do not mix crossply and
radial tyres. It is recommended that
tyres from different manufacturers are
not mixed on a vehicle.
Wheels and Tyres
Tyre Pressure Recommendations - Typical Axle Loads
Tyre Size:- BUS: XZU+ 275/70 R22.5 max. plated weights
Laden Front Axle Load Laden Drive Axle Load
Load (kg) Pressure Load (kg) Pressure
psi bar psi bar
6300 131 8.9 11500 123 8.4