TM 5-3810-289-12
Section IV. OPERATION UNDER USUAL CONDITIONS
(5) If necessary to propel with the
2-14.
General
load suspended, snub it to the foot of the boom to
prevent it swinging out beyond the boom point.
a. Instructions in this section are
(6) Keep the load as low as possible
published for information and guidance of
and use extreme care when traveling with a high
personnel responsible for operation of the crane-
boom.
shovel.
(7) Use the auxiliary hoist line for
b. The operator must know how to
light loads only.
perform every operation of which the crane-shove
(8) Be sure hoist and boom
is capable. This section gives instructions on
suspension cables are in good condition before
starting and stopping the crane-shovel, basic
making any heavy lifts.
motions of the crane-shovel, and on coordinating
(9) Use the boom hoist to change the
basic motions to perform specific tasks for with the
boom angle for accurately spotting the load, but
equipment is designed.
Since nearly every
avoid using the boom hoist with heavy loads
presents a different problem, the operator have to
suspended.
vary given procedures to fit the individual job.
b. Operation.
(1) Start the crane-shovel (para 2-
2-15.
Starting
15).
a. Preparation for Starting.
(2) Refer to figures 2-40 through 2-
(1) Perform necessary daily prevent
44 to operate the crane.
maintenance services (para 3-6).
(2) Check load requirements.
2-18.
Operation of Dragline
b. Starting. Refer to figure 2-38 and start
a. General.
the crane-shovel.
(1) Work with boom at highest angle
that will allow the reach and accuracy needed for
2-16.
Stopping
the particular job.
a. Refer to figure 2-39 and stop the
(2) Avoid pulling the drag cable
crane shovel.
socket into the fairlead.
b. Perform
the
necessary
daily
(3) Be sure that the bucket teeth are
preventive maintenance operations (para 3-6).
kept sharp.
(4) Do not use bucket of larger
2-17.
Operation of Crane
capacity than recommended for normal rapid
a. General.
operation. Overloading results in extra maintenance
(1) Be sure the boom length and
and delay.
boom al are such that the load to be lifted comes
(5) Take an even cut and fill the
with the limit given in the table of maximum
bucket, being sure to fill the back corners. Keep
allowable lifting loads (para 1-5b, (9)).
the drag hitch adjusted for the best penetration of
(2) Crane ratings are based on a firm
materials.
level foundation for the crane and if the footing is
(6) Piling dirt under the boom foot
soft enough so that the crane will sink in to extent,
wastes time and power and makes a wearing trap
due allowance must be made.
for the drag cable.
(3) Swing the boom directly in line
(7) It is important to use the proper
with load before picking up the load.
length of dump-cable so that the bucket can be
(4) Pick up the load gradually and do
picked up at a considerable distance ahead of the
catch it suddenly on the brake when lowering such
machine without spilling the dirt.
practice places unnecessary strain on boom.
b. Operation.
(1) Start the crane-shovel (para 2-
15).
(2) Refer to figure 2-45 to operate
the drag-line.
2-39
