TM 5-3810-231-12
Figure 81. Heater and defroster, removal and in8tallation.
Section XXI. BOOM ASSEMBLY AND COMPONENTS
b.
Removal.
142.
Boom Assembly and Backstop
(1) Remove all reeving from the crane
a.
General. The boom assembly consists of
boom (fig. 23).
two sections. The lower base section is connected to
(2) Remove boom assembly from the
the revolving frame. The upper point section carries the
revolving frame (para 42).
boom point sheave assembly. A 20 foot boom insert
c.
Disassembly.
Refer to figure 82 and
section is provided to be inserted between the base and
disassemble boom and components.
point sections to extend the boom. All sections are of
welded construction.
d.
Cleaning, Inspection and Repair.
(1) Clean
all parts with an approved
cleaning solvent and dry thoroughly.
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