Table of Contents
Advertisement
Transport Operation
When operating the machine in ideal conditions (e.g.
level graded surfaces) normal driving and gear se-
lection must be used.
The machine may be operated at maximum speed in
accordance with the site regulations.
Always adapt the machine speed to the conditions.
When driving through a bend do not drive too fast,
especially while transporting a load. If the surface is
slippery or cambered, the operator could lose con-
trol.
The machine load must not be allowed to fall off the
machine at any time.
Do not use the inter-axle differential lock when oper-
ating on smooth graded surfaces.
Due to the mass of the machine allow for long brak-
ing distances, especially on slippery surfaces.
Uphill Operation
The machine operates in full automatic mode and
the transmission will select the correct gear for trav-
elling uphill.
When operating on slippery surfaces the inter-axle
differential lock must be applied to allow for even
traction on all the driving wheels.
The engine speed must be kept constant at all times
when driving uphill.
Note: Shift cycling or "gear hunting" on certain uphill
applications can be eliminated by correct use of the
range hold switch.
"Gear Hunting"
Under certain conditions, the transmission may start
shift cycling or "gear hunting" i.e.. The transmission
changes up and down between two gears at short in-
tervals. This is because the power is insufficient for
operating in the higher gear but is sufficient for up-
shifting from the lower gear.
When the range hold switch is ON the transmission
will hold the gear that it is in at the time of the switch
being activated. Normal down shifting will occur, but
the transmission will not up shift to a higher gear until
the switch is switched OFF.
When level ground is reached the machine must be
operated normally.
870984-01
June 1, 1999
Downhill Operation
When driving downhill the exhaust brake and retar-
der must be utilised to assist the service brakes and
to reduce brake pad wear.
If necessary, slow down before the downhill slope
begins so that the transmission automatically selects
a low gear.
During icy or other slippery conditions, utilise the
inter-differential lock to improve traction and braking
effect.
Using the Engine to Slow the
Machine
‹ WARNING
If the operator just downshifts or just uses the
service brakes while going downhill, he may lose
full control of the machine.
To help in keeping full control on downhills, use a
combination of downshifting, braking and the retar-
der.
Downshifting to a lower gear increases engine brak-
ing and helps the operator maintain full control.
The transmission has a feature which prevents auto-
matic upshifting above the lower gear selected.
However during downhill operation, if engine gov-
erned speed is exceeded in the lower gear, the
transmission may upshift to the next higher gear.
This will reduce braking and may cause a loss of
control.
Apply the service brakes to prevent exceeding en-
gine governed speed in the lower gear selected.
To use the engine as a braking force, the operator
must:
• Take his foot off the accelerator.
• The transmission will start to downshift and the
exhaust brake will be applied.
If the machine is exceeding the maximum speed for
this gear, use the service brakes to slow the ma-
chine.
When a lower speed is reached, the ECU will auto-
matically downshift the transmission.
Engine braking provides good speed control for trav-
elling downhill. When the machine is fully loaded, or
the gradient is steep, it may be desirable to pre-
select a lower gear before reaching the gradient.
39
Advertisement
Table of Contents
