Moving the Machine
Changing Speed and Direction
Transmission Range Selector
Stop the machine immediately if the low
air pressure indicator goes on, or the elec-
tric warning horn sounds. There may be a
malfunction of the air and brake system.
After an emergency stop, be sure the air
pressure is in the operating range before
First, second and reverse are torque
moving the machine.
converter driven. Third through eighth
speeds are direct drive.
First and reverse must be selected
manually. The transmission will shift
automatically between second and any other
speed selected in the automatic range
(third through eighth).
Manual shifting during loading, hauling or
spreading is not necessary or
recommended. Select the highest usable
speed for job conditions.
However, if more wheel torque is
required, manually shift to first speed.
Pull the button out to apply the
emergency brakes if the service brakes fail.
The emergency brake will be applied
First speed is not protected by downshift inhi-
automatically if the air pressure in the
bitor. Engine overspeed could result if the
reservoirs drops below 280 kPa (40 psi).
transmission is shifted into first speed at over
8 kph (5 mph).
The machine must be stopped and the engine
If the air pressure drops, or if the emergency
must be running at low idle when changing
brakes are applied, be prepared for a sudden
For more information on the most efficient
Have your seat belt properly adjusted at all
use of the transmission, see "Operating
Techniques for the Caterpillar Eight Speed
Transmission," Caterpillar Form Number