TM 5-3810-288-12
1.
Master light switch
16.
Emergency-release-park lever
31.
Horn button
2.
Cab dome light switch
17.
Starting aid
32.
Directional signal lever
3.
Oil temperature warning switch
18.
Inter-axle differential lockout
33.
Trailer brake lever
4.
Water temperature warning light
19.
Dry road switch
34.
Windshield washer control
5.
Engine oil pressure gauge
20.
Windshield wiper switch
35.
Headlight dimmer switch
6.
Left turn directional lamp
21.
Fuel level gauge
36.
Clutch pedal
7.
Speedometer/odometer
22.
Panel lamp
37.
Brake treadle valve
8.
High beam indicator
23.
Panel lamp
38.
Accelerometer pedal
9.
Tachometer/hour-meter
24.
Water temperature gauge
39.
Main transmission shift lever
10.
Right turn directional lamp
25.
Cab heater switch
40.
Transmission shift button
11.
Air pressure gauge
26.
Panel lamp
41.
Transfer case control lever
12.
Park abort control
27.
Battery generator indicator
42.
Front axle control lever
13.
Engine throttle control
28.
Ignition switch
43.
Low air pressure indicator
14.
Reservoir drain valve
29.
Hazard warning switch light
44.
Windshield wiper hand lever
15.
Tractor protection valve
30.
Hazard warning switch
45.
Emergency switch
Figure 6-1. Carrier instruments and controls.
(3) Place the lever in the RELEASE position. The
or slippery conditions. When front axle drive is used, the
carrier brake system is now ready for normal operation.
operator should also consider engaging the interaxle
differential lockout, as well as the SLIPPERY ROAD
d. Towing Another Vehicle. To tow, another vehicle,
position of item 19, figure 6-1.
b. Engaging Front Axle Drive. To engage the
proceed as follows:
front axle drive, proceed as follows:
(1) Connect both the EMERGENCY and SERVICE
(1) Stop the vehicle completely.
BRAKE systems at the rear of the truck crane to the
(2) Shift the transfer case into the LOW position.
vehicle to be towed.
(3) Shift the front axle control lever (41, fig. 6-1)
(2) Place lever (fig.
into the IN position.
EMERGENCY position and run the engine until the
(4) Shift the main transmission lever to the desired
carrier air pressure is at least 50 psi. It is recommended
starting position and bring the carrier up to operating
that the towed vehicle not be moved until it reaches
speed in the usual manner.
normal system pressure. When the low air pressure flag
c. Disengaging Front Axle Drive. Disengage
rises, place the lever in the RELEASE position.
front axle drive as follows:
(3) Depress valve (15, fig. 6-1). The towed vehicle
(1) Stop the carrier.
brakes will now operate when the carrier air brakes
(2) Shift the transfer case into the HIGH range.
operate, and the carrier can be driven normally. The
(3) Shift the front axle control lever to the OUT
trailer brake lever (33, fig. 6-1) is used to apply the
position.
brakes on the towed vehicle only. Be careful to avoid too
(4) Bring the carrier up to speed, using the main
much speed on grades and use more caution than usual
transmission shift lever.
when towing another vehicle.
6-9. Front Axle Drive
a. General. The use of the driving front axle
should be restricted to off highway or very rough
Section IV. OPERATION UNDER USUAL CONDITIONS
specific operations for which the equipment is designed.
6-10. General
a. The instructions in this section are published
6-11. Starting
a. Preparation for Starting.
for the information and guidance of personnel
responsible for operation of the Model M320T truck
(1) Perform the pre-operation services (para 2-1).
crane carrier.
b. The operator must be thoroughly familiar with
(2) Lubricate the carrier as specified in (LO 5-3810-
288-12.
the use of the controls of Model M320T truck crane
b. Starting. Refer to figure 6-2 and start the
carrier. This section gives instructions on starting and
carrier.
stopping the carrier, operation of the carrier, and on
coordinating the basic motions required to perform the
6-5
