"on". When the lighting switch is pulled out all the way, the
headlights, side marker lights and taillights are "on". To light
the instrument panel, turn the light switch control to the left; a
built-in rheostat controls the intensity of the panel light from
"off" to full "on". To turn the cab interior light on, turn the
lighting switch control counterclockwise to the extreme left
PARKING BRAKE CONTROL
The primary purpose of this brake is to hold the
vehicle in a parked position or to assist in bringing it to an
emergency stop. The parking brake should not be used to
brake the vehicle during normal driving.
To apply the parking brake, pull out control. To
release the parking brake, push in on control.
If air pressure is reduced to approximately 69 kPa (10 psi) in
both the primary and secondary systems, the parking brake
control will automatically apply.
The Orscheln (parking) brake lever is the over-center
locking type. It is tightened (while released) by turning the
adjusting knob clockwise. When properly adjusted, it pulls
overcenter with a distinct click.
POWER DIVIDER LOCK CONTROL
(For tandem drive axles)
The power divider lock control is used with vehicles
equipped with dual rear axles having inter-axle differentials.
A light, located on the instrument panel will illuminate
when the power divider lock is engaged.
POWER TAKE OFF CONTROL
The power take off control is used to assist in operating the
winch, dump body or wrecker equipment.
ON OFF SWITCH & VOLUME CONTROL The on-off switch
and volume control are combined and are operated with the
TONE CONTROL Tone control is behind the on-off switch.
Turn the tone control fully clockwise for voice position; mid-
position for music; fully counterclockwise for bass.
TO TUNE STATIONS MANUALLY Turn the right-hand knob
either left or right.
PUSH-BUTTON TUNING is accomplished by firmly pressing
one of the push-buttons which automatically selects the
station for which it was set. (See Section "TO SET PUSH-
FADER/BALANCE CONTROL Fader/Balance Control is
behind tuning knob. Turn control knob either clockwise or
counterclockwise to get desired relative volume between
speakers. (All models do not have this control.) To Set Push
Stations may be set up in any order. However, for
convenience in remembering, it is suggested that stations be
set up in frequency sequence.
Turn radio on and allow to operate for fifteen
Unlock push-buttons by pulling them out.
Accurately tune in a station with the manual tuning
Lock on push-button to that station by pushing firmly
Repeat above procedure to remaining pushbuttons.
In metropolitan areas, it is recommended that the
push-buttons be set up on a shielded place where signals are
weak, such as under a viaduct or in a steel-constructed
Antenna Trimmer Adjustment (Radio)
Turn radio on and increase volume until an audible
sound or station is heard.
Tune in a weak station (or random noise level
between stations) between 1400 and 1600 KHz.
Remove right radio control knobs (pull out).
Insert screwdriver through access hole in radio
mounting cover and adjust antenna trimmer screw
for maximum volume.