SET-UP AND INSTALLATION 777 OPERATOR’S MANUAL
4-2 Published 10-01-12, Control # 044-05
• Counterweight handling pendants and counterweight
pivot frame for installing and removing the
counterweights.
• Counterweight installation and removal can be
controlled by the counterweight remote control (in setup
mode) or by the boom hoist control located in the cab.
• 30 USt (27 t) load block and 4-leg chain sling with hooks
for handling parts.
ASSEMBLY AND DISASSEMBLY NOTES
The crane, boom, and jib shall be assembled and
disassembled by experienced personnel trained in erection
and operation of construction cranes.
Read and become thoroughly familiar with the instructions in
the applicable capacity charts, in this section, and in the
rigging drawings at the rear of this section before attempting
to assemble or disassemble the crane, boom, or jib.
Contact your Manitowoc dealer for assistance if any
procedure is not fully understood.
ASSEMBLY AND DISASSEMBLY AREA
Select an assembly/disassembly area that has a firm, level,
uniformly supporting surface. Make sure the area is large
enough to accommodate the crane, the selected boom and
jib length, movement of trucks with trailers, and movement of
the 777 (or assist crane).
Set the carbody jack pads on a flat, firm foundation that will
support the load placed on them. The maximum load on
each jack is 70,000 lb (31 752 kg).
Do not set the jack pads in holes, on rocky ground, or on
extremely soft ground.
If necessary, use wood blocking or steel plates under the
jack pads to properly distribute loading. Blocking or steel
plates must be:
• Free of defects.
• Strong enough to prevent being crushed or bent.
• Of sufficient size to prevent settling under load.
Contact Manitowoc Crane Care for ground bearing
information.
ACCESSING PARTS
Some parts of the crane, boom, and jib cannot be reached
from the ground. Take necessary precautions to prevent
falling off the crane or boom during assembly and
disassembly.
Owner/user shall provide approved ladders or personnel
hoists so workers can safely access those areas of crane,
boom, and jib that cannot be reached from ground. Adhere to
local, state, and federal regulations for handling personnel.
Optional boom ladders (stored in boom butt) are available
from Manitowoc. If your crane has ladders, see instructions
later in this section.
CRANE WEIGHTS
See Crane Weights in Section 1 for overall weight of the
crane and individual weights of components.
RETAINING CONNECTING PINS
Connecting pins are retained in various ways:
• Snap pins.
• Quick-release pins.
• Cotter pins.
• Keeper plates with cap screws and lock washers.
Do not operate crane until all connecting pins are installed
and properly retained.
COLD WEATHER MAST OPERATION
The mast, mast cylinders, and mast arms can be damaged
when attempting to lower the mast during cold weather.
Do not attempt to lower the mast during cold weather until
the following steps have been performed:
• Hydraulic oil warmed up to at least 60°F (16°C).
• Mast cylinders fully extended and retracted twice to fill
cylinders with warm oil.
NOTE: To check hydraulic fluid temperature, observe HYD
TANK FLUID TEMP on the digital display in the
operator’s cab.
LOWERWORKS LUBRICATION AT
ASSEMBLY
Each time the crawlers are assembled to the carbody,
thoroughly clean and apply Never-Seez
®
or equivalent anti-
seizing compound to all machined surfaces on the carbody
and the crawlers — surfaces marked ✱ in Figure 4-1.
If this step is not performed, excessive friction will occur in
the closely machined mating surfaces between the crawlers
and the carbody. The result will be loud noises coming from
the lowerworks when turning (cutting) the crawlers or
swinging the upperworks over the corner of the crawlers.
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