SETUP AND INSTALLATION 2250 OPERATOR MANUAL
4-70
Published 06-24-16, Control # 241-01
BOOM LADDER ASSEMBLY (#44 BOOM)
See Figure 4-38 for the following information and
procedures.
General
Two ladders are installed inside the boom butt, one on either
side. The ladders are designed for use in assembly/
disassembly and maintenance of #44 boom sections and
components. Each ladder weighs approximately 8 kg (18 lb).
Removal from Boom Butt
It is recommended that two people remove the ladder from
the boom butt, one person inside the boom butt to unlatch
and lift the ladder and another person outside the boom butt
to help guide the ladder out of the boom butt.
1. Lower the boom onto blocking at ground level.
NOTE: Boom sections must be horizontal.
2. Unhook the rubber latches (see View A).
3. Lift the ladder up and out of the hooks.
4. Guide the ladder through the lacings to the outside of the
boom butt.
Installation on Boom Inserts
See Figure 4-38, View C for the following procedure.
Lift the ladder to the desired outside location on the insert so
that the upper pad is securely hooked over the backside of
the upper chord and lower pads rest firmly against the lower
chord.
NOTE: The ladder must hang vertically against the boom
insert when in use.
Storage in Boom Butt
See Figure 4-38 for the following procedure.
It is recommended that two people store the ladder in the
boom butt, one person outside the boom butt to help guide
the ladder into the boom butt and another person inside the
boom butt to lift the ladder and latch it into position.
1. Hang the ladder rails over hooks inside the boom butt
(see View B).
2. Pull the rubber latches tightly over the lower rail and
latch in the keepers (see View A).
3. Ensure that the ladder cannot move once latched in
place.
WARNING
Equipment Use Hazard!
Observe the following precautions, or serious injury can
occur:
• Limit the load on the ladder to 136 kg (300 lb).
• Avoid improper use. This ladder is intended for use
only on Manitowoc Cranes #44 boom inserts. Any
other use is prohibited.
• Use the ladder for boom assembly/disassembly and
maintenance only when the boom is horizontal.
• Make sure the ladder is properly secured to the
insert.
• When climbing the ladder, hands must be free of any
objects. Objects that cannot be carried in pockets or
tool belts must be lifted into place onto the ladder
platform prior to climbing the ladder.
• Stand only on the platform. Do not stand on cross
braces.
WARNING
Falling Load Hazard!
Injury can occur if ladders are not properly stored.
Ladders must be properly stored to prevent them from
falling out of the boom butt when the boom is raised.
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