INSERTS AND JIB
Figure 1 illustrates the jib for the Model 5060 crane.
This manual is confined to lubrication, installation,
removal, adjustment and general information concerning
operation and maintenance of the boom inserts , jib and
headache ball. It also contains repair parts information.
BOOM AND JIB WORKING RANGE
The working range and other pertinent specifications are
shown in Figure 2.
procedures for: increasing boom length, adding jib, and
erecting and lowering the jib. The procedures given are
for attaching items, whenever possible, without the use
of an assisting machine. If an assisting crane is required
it is noted that it is required. It is important that the
machine operators manual is read before proceeding
INCREASING BOOM LENGTH. To increase the boom
length beyond the basic boom (base plus tip), proceed
This machine is not to exceed 70 of boom. DO
NOT add inserts beyond a total boom length of
Using the basic boom, arrange the required
inserts, on blocking in a line. See Figure 3 for the boom
and guy line arrangement at the particular length of
boom required. Do not pin the inserts together at this
time. Also arrange and assemble the jib and jib strut, if
using, on a minimum of 6 inches of blocking. This is
done at this time so that when the main boom is
assembled the machine can be moved up to the jib base
and be pinned to the tip section of the main boom.
When the required inserts are laid out, lower the
basic boom. Provide a minimum of 6 inches of blocking
under the base and tip section (see Figure 2, View A).
Pin the upper spreader to the boom base and remove
the guy lines connecting the tip section to the upper
spreader. Engage the boom hoist to remove all slack in
the hoist lines.
Remove the bottom connecting pins of the boom
base and tip section.
Do not stand under the boom or inside the boom
structure when removing pins. The boom could
fall if improperly supported and could cause
Allow the attachment to hinge about the top
connecting pins and lower the base and tip until they rest
on the blocking. Remove the top connecting pins (see
Figure 2, View B).
Engage the boom hoist and slowly raise the
base (insert) off of the blocking. Reposition the machine
behind the next insert to be added and align the top
connectors. Insert the top connecting pins(Fig. 2, View
Engage the boom hoist and raise the attachment
until the bottom connecting pins can be inserted.
Lower the attachment and provide blocking
under the end of the insert. Install the guy lines from the
end on the insert to the spreader (see Figure 2, View
C).). Unpin the upper spreader from the boom base.
Repeat steps 5 and 6 until a total of 50 feet of
inserts have been connected. When a total of 50 feet of
inserts have been connected it will be necessary to
install additional guy lines (see Figure 2, View D).
Do not cantilever more than 50 feet of inserts.
The attachment or guy lines could be damaged if
more than 50 feet of inserts are cantilevered.
Continue adding inserts, as explained in steps 5,
6 and 8, until the required inserts and tip section have
Consult the load rating chart (TM 5-3810-303-14)
regarding the boom lengths which require
JIB. To attach the jib, proceed as follows: