freightliner Cargo Manual page 31

10/01/98
Fig. 3.8, Interrupt Switch
lights will come on and stay on as long as the problem
exists.
If the yellow engine check light comes on while driving,
some engine features will not work, but the vehicle can
still be driven. If the red engine stop light comes on
while driving, and if the engine will not accelerate, pull
off the road and shut down the engine. In either situa-
tion, have the problem repaired as soon as possible.
See Group 54 in the Cargo Workshop Manual for
troubleshooting procedures.
Driver Controls and Instruments
Cruise control and PTO governor are controlled with
two switches. An ON/OFF switch allows the driver to
select cruise control or to drive using the foot throttle. A
spring-loaded SET/RESUME switch allows the driver to
select the cruise speed or to resume the cruise speed
after slowing down.
The power takeoff mode of operation is also controlled
with the cruise control switches, when the vehicle is sta-
tionary. The engine speed can be set in the 800 to 1600
rpm range by placing the ON/OFF switch in the ON po-
sition, then pressing the SET/RESUME switch when the
desired rpm is reached. See
erating instructions.
f601424a
Parking Brake Control Valve Knob
A diamond-shaped knob in the control panel operates
the parking brake control valve. See
knob is out, the truck's spring parking brakes are ap-
plied. When the knob is in, the parking brakes are re-
leased. Before the parking brakes can be released, air
pressure in either brake system must be at least 65 psi
(447 kPa).
See Chapter 7
ing brake valve.
Chapter 4 for detailed op-
Fig. 3.9. When the
for instructions on the use of the park-
3.6