a. General. The truck crane may be converted to
lengths, and must be for the specific boom installed so
that the connecting joints of the boom and insert match.
crane operation by installing the crane front-end
Longer guy cables are necessary when the length of the
assembly. The following components are necessary for
boom is increased. Refer to table 1-1.
the equipment conversion; one 15 foot boom base
b. Boom Installation.
section, one 15 foot point section, boom foot pins, boom
Note. To install the boom, a cribbing will be
guy cables, boom hoist cable, boom backstops, hoist
necessary to support the boom in a horizontal position.
line, and hook block. The basic crane boom may be
The cribbing must be high enough to bring the boom into
extended by installing boom inserts between the boom
position with the boom foot lugs on the revolving frame,
base section and the boom point section. The boom
as shown in figure 2-4.
inserts .are in 10-foot
Figure 2-4. Cribbing prepared for boom assembly and installation.
(1) Lift the boom sections into place on the
lugs on the revolving frame are alined with the bores in
cribbing.
the boom base section.
(2) Refer to figure 2-5 and install the boom
(4) Refer to figure 2-6 and install the boom
connection capscrews, lockwashers and locknuts so that
foot pins.
the boom base section, insert (if used), and tip section
form a complete assembly.
Figure 2-5. Connecting boom sections.
Figure 2-6. Installing boom foot pins.
(3) Carefully move the carrier up to the
cribbed up boom, so that the bores in the boom foot
2-3
