gentry of backhoe attachment.
into engine clutch, main drive chain case, jackshaft
(17) One 1-pound charge against each corner
bevel gear case, horizontal gear train, and propelling
single at midpoint of crane boom.
shaft oil pan.
(18) One 6-pound charge at boom point
(3) Start engine and engage clutch.
sheaves on crane.
(4) Operate the front end attachment forcibly
(19) One 4-pound charge at dragline pins and
into a bank or tree, or another object, to damage boom
a 2-pound charge at hoist line pins of dragline bucket.
and break cables.
(20) One 4-pound charge on upper closing
(5) Drop bolts, nuts, and tools into gear trains.
sheaves and one 41/1 pound charge at lower closing
(6) Operate unit until failure occurs.
sheaves and hinges of clamshell bucket.
(21) Three 4-pound charges along piledriver
5-6.
Demolition by Explosives or Weapons Fire
leads.
a. Demolition by Explosives. Place as many of the
(22) One 6-pound charge in propelling gear oil
following charges as the situation permits, and detonate
pan.
them simultaneously with detonating cord and a suitable
(23) One 4-pound charge on each of the
detonator.
crawler tracks at crawler drive sprocket.
(1) One 4-pound charge on engine drive
(24) One 4-pound charge on each chain drive
sprocket and jack-shaft sprocket.
sprockets on end of horizontal propelling shaft.
(2) One 4-pound charge against the main
b. Demolition by Weapons Fire.
Fire on
clutch and machinery side frame castings at each end of
craneshovel unit with the heaviest weapon available.
main drum shaft.
(3) One 4-pound charge against boom hoist
5-7.
Other Demolition Methods
mechanism.
(4) One 2-pound charge against each of the
a. By Scattering and Concealment. Remove all
swing clutches on the jackshaft.
easily accessible vital parts, such as fuel injectors,
(5) One 4-pound charge in the jackshaft
hydraulic lines, control levers, brake and clutch
bevel gear case.
cylinders, starting motor, and hook rollers. Scatter these
(6) One 4-pound charge on top of the vertical
parts through dense folage; bury them in dirt or sand, or
propelling shaft.
throw them in lake, stream, well or other body of water.
(7) One 2-pound charge between starter and
b. Burning. Pack rags, clothing or canvas under
engine.
and around unit, particularly around engine, clutches,
(8) One 4-pound charge at each of the boom
brakes, and fuel tanks, saturate, this packing with
hinges.
gasoline, oil or diesel fuel and ignite it.
(9) One 4-pound charge against each of the
c. Submersion. Totally submerge the craneshovel
hook rollers.
unit in a body of deep water to provide water damage
(10) One 4-pound charge against side of
and concealment. (Salt water does most damage to
engine.
metal parts).
Note.
The above charges are considered
minimum requirements for this method.
5-8.
Training
(11) One 8-pound charge on shipper shaft of
All operator's should receive thorough training in
shovel boom.
methods of destroying the crane-shovel unit. Refer to
(12) One
8-pound
charge
on
dipper
FM 5-25. Simulated destruction, using methods listed
handlebucket connection.
above, should be included in operator training programs.
(13) One 1-pound charge on each of boom
It must be emphasized in training that demolition
hoist sheaves.
operations are only necessitated by critical situations,
(14) One 8-pound charge at bucket-dipper
when time available for destruction is limited. For this
stick connection of backhoe attachment.
reason, it is necessary that operators be thoroughly
(15) One 4-pound charge at stick point, and
familiar with all methods of destruction and be able to
another at stick pivot of backhoe attachment.
perform demolition without referring to this or any other
(16) One 6-pound charge against auxiliary
manual.
5-2
