4Wd Operating Precautions - New Holland T7030 Operator's Manual

SECTION 2 - - CONTROLS, INSTRUMENTS AND OPERATION
NOTE: The following applies only to tractors fitted
with a steering angle sensor.
Wheel speed falls below 10 Km/h (6.2 MPH) and
•
steering angle
SuperSteer). Four wheel drive will re--engage
when the steering angle is reduced.
Wheel speed is between 10 and 20 Km/h (6.2
•
and 12.4 MPH) and steering angle exceeds 25°
(17° with Supersteer). Four wheel drive will
re--engage when the steering angle is reduced.
NOTE: The above steering angles are set during
manufacture, if an alternative angle setting is
required, consult your authorised dealer.
The indicator light (1) Figure 152 on the instrument
panel will also illuminate but will only remain lit when
four wheel drive is engaged.

4WD Operating Precautions

WARNING
Four wheel drive greatly increases traction. Extra
caution is needed on slopes. Compared to two-wheel
drive, a 4WD tractor maintains traction on steeper
slopes, increasing the possibility of overturning.
IMPORTANT: To avoid excessive tyre wear when
travelling on the public highway or any hard surface,
it is recommended that four wheel drive be
disengaged. Always use the specified front/rear tyre
combinations to ensure acceptable tyre wear.
WARNING
Tractors with four wheel drive engaged or
disengaged should not be allowed to exceed 50 km/h
(31 MPH) where permitted. Overspeeding by towing
or coasting downhill with clutch depressed or
transmission in neutral may cause loss of control,
personal injury to the operator or bystanders or
mechanical failure.
2--90
exceeds 30° (21° with
NOTE: Keep the tractor in the same gear going
downhill as would be used when going uphill.
On four wheel drive tractors, drive to the front axle is
automatically engaged when both brake pedals are
applied simultaneously to provide four wheel
braking. Additionally, you may have the optional front
disc brakes. The effectiveness of four wheel braking
greatly enhances tractor braking performance
therefore appropriate care should be exercised
during heavy braking.
Front tyres should never be inflated above the
recommended pressure. Ideally, rear tyre pressures
should be maintained at least 0.4 bar (6 lbf/in
front tyre pressures, provided the manufacturers'
recommendations are not exceeded.
IMPORTANT: Never attempt to drive the tractor with
the drive shaft removed, even if you have no intention
of using four wheel drive. With the drive shaft
removed, application of the brakes will result in
severe damage to transmission components.
CAUTION
152
2
) above