TM 5-3810-288-12
(30) Hazard warning switch. This switch turns
on flashing lights at all four corners of the carrier. (item
(44) Windshield wiper hand lever. This lever
45).
may be used to operate the windshield wiper blade
(31) Horn button. Depress this button to sound
manually.
the carrier horn.
(45) Emergency switch.
Redundant hazard
(32) Directional signal lever. Pull this lever down
warning switch. Same function as item 30.
to turn on the left turn directional signal. Push this lever
up to turn on the right turn directional signal.
6-8. Brake System Operation
(33) Trailer brake lever. When towing an-other
a. Driving Normally. There are three positions of
vehicle, pull this lever down to apply the brakes of the
EMERGENCY-RELEASE-PARK lever (fig. 6-1, item 16).
towed vehicle.
To operate the carrier normally, drive to the work site in
the RELEASE position, stop the carrier, and place the
(34 Windshield washer control. Depress this
control in the EMERGENCY position. This position is
button to squirt windshield cleaning fluid on the
used for short term parking. When ready to move, flip
windshield.
the control to the RELEASE position and drive away.
(35) Headlight dimmer switch. Depress this
b. Overnight Parking. When through working
switch to change from low beam headlights to high
for the day, or when intermediate term parking (several
beam. Depress the switch again to reverse the process.
hours) is required, drive to the point where the carrier will
(36) Clutch pedal.
Depress this pedal to
be parked. Stop the carrier and place the lever (fig. 6-1,
disengage the carrier engine clutch while shifting gears.
item 16) in the PARK position. This will drain air
(37) Brake treadle valve. Depress this pedal to
pressure from the system and mechanically engage the
apply the carrier service brakes, and the brakes on the
carrier brakes. When ready to move the carrier again,
towed vehicle, when towing another vehicle.
start the engine, place the lever in the EMER-GENCY
(38) Accelerator pedal. Depress this pedal to
position, and wait until the low pressure indicator flag (fig.
increase carrier speed.
(39) Main transmission shift lever. Depress
minutes, and there may be an interval at about 95 psi air
clutch pedal (item 36) and shift the main transmission as
pressure when the charging seems to slow down. This
indicated on the transmission shift instruction plate on
is normal and should be overlooked. Also, the low air
the carrier dash. Refer to paragraph 6-9.
pressure buzzer will be on while the air pressure flag
(40) Transmission shift button. Pull up on this
goes up, place the lever in the RELEASE position and
drive the carrier normally.
button to shift the main transmission from the low speed
c. Park Abort. When it is desired to park the
range to the high speed range, or push it down to shift
carrier for a very long period of time, it is placed in the
from the high speed range to the low speed range.
(41) Transfer case control lever. Place this lever
PARK ABORT condition by means of item 12, figure 6-i.
Under these circumstances, the air supply is bled out of
in HIGH for normal highway driving. Place the lever in
the entire system and the brake shoes are mechanically
LOW for off-highway driving. A neutral position is also
prevented from coming in contact with the brake drums.
available. Stop the carrier before shifting.
(42) Front axle control lever. Place this lever in
Warning: While in the park abort condition, the
carrier will have no brakes. Always block the wheels so
the IN position when front wheel drive is to be used.
as to prevent truck crane motion before placing the
Keep the lever in the OUT position when driving under
machine in the park abort condition. Do not remove
normal highway conditions.
blocking until the carrier is re-turned to normal brake
(
system operation as follows:
43) Low air pressue indicator. This flag type
(1) Start engine.
indicator will allow the flag to drop when air pressure
(
drops
below
the
safe
operating
range.
GENCY position and run engine until the low air pressure
flag rises, indicating system pressure is within the
operating range.
6-3
