b. Close rain shutters (fig. 2-32).
that the load or hook block has been lowered to the
ground.
c. Close the hand throttle. If possible, allow the
2-13. Starting the Crane
engine to run at half speed or less for several minutes
before closing the throttle and stopping the ' engine.
a. Start the crane engine (para 2-11).
This will allow the engine to cool down and will prevent
b. Make certain that all operating clutches are
overheating due to localized residual heat.
disengaged and that all brakes are set. Engage the
d. Stop the crane engine (fig. 2-35).
engine clutch, and listen for noisy operation.
c. Check the drum brakes by applying the brakes
2-15. Crane Operation
and engaging the drum clutches very slightly, pulling
against the set brakes. Any slipping of the brakes will be
a. General. The model M320T2 truck crane, with
felt and seen.
d. If possible lift a maximum load a few inches
the crane boom installed and reeved for crane operation
is capable of accurate placement of a load at an
above the ground and make certain that it is held without
elevation above or below the level of the crane cab.
drifting. If the brakes-will not hold the load, report to
b. Load Limits. Refer to paragraph 1-4 for load
organizational maintenance.
e. Release each drum brake in turn, and try the
limits before starting operation.
c. Positioning the Carrier. Back the carrier to the
drum clutches for smooth engagement and responsive
work site so that most of the work will be performed over
operation.
f. During an operational test, make a check for
the rear of the carrier. Dumping or unloading should be
done over the sides of the carrier, if possible. Set the
leaks from fuel and oil lines, and from the cooling
carrier brakes, and extend and set the outriggers. Refer
system.
to figure 2-2.
g. Check all housings for overheating. Prolonged
d. Operating cycle. The crane operating cycle
use of brakes or clutches, in excess of normal operation,
consists of five steps: setting the boom angle (boom)
will cause overheating, lining wear, and damaged drums.
hoist operation , lifting the load (hoisting),.
h. If there is evidence of equipment failure, report
swinging the load. spotting the load. and lowering the
the condition to organizational maintenance.
load. Start the crane engine (para 2-11) and operate the
crane as shown on figure 2-36.
2-14. Stopping the Crane
a. Place all control levers in the neutral position.
b. Make certain that the swing brake is set, and
2-34
