Changing to a Different Tire Size
IMPORTANT: Refitting is only permissible to a tire combination
that is authorized for the tractor. Please note that it may be necessary
to adjust the transmission ratio or to exchange the steering valve.
Further information on tire combinations and for calculating the transmission
ratio can be found in this section of the operator's manual.
Changing to a different tire size may make considerable adjustments
necessary. The scope of this depends on the tractor's configuration.
Be sure to take all the information in the following list into
account and follow the recommendations in the right column.
| Symptom | Problem | Solution |
|
The indicated speed is lower or higher than the actual
speed.
| Parameters to determine the wheel speed do not fit to
the new tires. |
An adjustment of the
top speed becomes essential. Entry of the correct parameters by an
authorized dealer.
|
|
The emergency steering characteristics may get worse.
| A change to different tires on the front wheels may
cause increased steering forces. This has an effect in particular
on the steering characteristics without motor support. |
An authorized dealer
needs to check whether a different steering valve is required for
using the new front tires.
If a non-suitable steering
valve is used, the operating license becomes void.
|
|
Error messages when using a radar.
| The calibration of the radar does not comply with the
tire size. |
New calibration by an
authorized dealer.
|
|
Increased wear of tires and front-wheel drive clutch
| The value for the front wheel lead of the front wheels
may get worse. |
Check of the tire combination
by an authorized dealer. If necessary, retrofitting of a fitting transmission
ratio.
|
|
Strains in the drive train may occur.
| The transmission ratio between rear and front axle does
not fit. |
Check of the tire combination
by an authorized dealer. If necessary, retrofitting of a fitting transmission
ratio.
|
|
Tires may come into contact with tractor components.
| Modifications to tread width or tire size make a readjustment
of the steering stop and fenders necessary. |
An authorized dealer
has to carry out the adjustment of steering stop and fenders.
|
|
The load capacity of the front tires may get worse.
| If tires with a smaller load index are used, the load
capacity decreases. |
Accustomed tasks may
possibly be carried out no longer.
|
|
The oil sight glass shows a wrong oil level.
| If you change to a different tire size, the height ratio
of rear to front axle may change. This has an effect on the oil level.
|
An authorized dealer
needs to check whether an exchange of the oil sight glass becomes
necessary.
|
|
The automatic switch-off1 of the front-wheel
drive does not function.
| The maximum possible shut-off angle for the automatic
engagement and disengagement of the front-wheel drive depends on the
tire type, tread width, and steering stop and can be less than the
angle that can be selected on the display. |
Set the shut-off angle
for the automatic engagement and disengagement. See “Engage
Front-Wheel Drive” in the “Operate the Tractor —
General” Section.
|
|
1 If equipped
|
OULXBER,0001C75-19-20151125
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