Figure 81. Heater and defroster, removal and in8tallation.
Section XXI. BOOM ASSEMBLY AND COMPONENTS
Boom Assembly and Backstop
(1) Remove all reeving from the crane
General. The boom assembly consists of
two sections. The lower base section is connected to
(2) Remove boom assembly from the
the revolving frame. The upper point section carries the
boom point sheave assembly. A 20 foot boom insert
section is provided to be inserted between the base and
disassemble boom and components.
point sections to extend the boom. All sections are of
Cleaning, Inspection and Repair.
all parts with an approved
cleaning solvent and dry thoroughly.