TM 5-3810-289-12
d. The crane-shovel has sufficient bearing area for
holes will in some cases provide the extra traction
required.
propelling over average soft ground. Where ground is
too soft to support the machine, timber mats should be
used. These can be made by drilling holes through logs
2-26. Operation in Salt-Water Areas
or timber and inserting rod bolts or wire rope to hold them
together. Use of rope gives completed mat more
If machine is operated within a few miles of sea coast,
flexibility follow uneven ground conditions than use of rod
paint exposed painted surfaces (outside of cab, boom,
bolts. Addition of timbers or planks along side of mat will
etc.) carefully with suitable paint and take care in
help prevent machine slipping side ways off mat. Mats
repainting wherever and whenever paint becomes
can be made in sections about 4 feet wide by 12 feet
scratched or worn away. Exposed metal parts that
long with rope slings ends. Sections can be hoisted with
cannot be painted should be kept well coated with oil or
a separate rope or chain sling and swung from rear to
grease. If machine operates with lower works immersed
front machine progresses.
in salt water, all parts that are in contact with water
should be kept well coated with asphaltum.
e. If material or time for mat construction not
available, logs or branches can be laid crossways of
2-27. Operation in High Altitudes
tracks to form corduroy road for propelling over soft
ground.
The crane-shovel is designed to operate at altitudes up to
5,000 feet above sea level. Higher altitudes will require
f. Extra traction for unusually soft or loose footing
readjustment of the fuel pump and fuel injectors to
can be improvised by drilling four holes in every fourth
maintain the proper air and fuel mixture.
tread and bolting on bars
short lengths of chain. The use of bolts only in the drilled
2-59
