Manitowoc Published 12-10-19, Control # 258-05 2-11
MLC90A-1/MLC100-1 OPERATOR MANUAL SAFETY INFORMATION
- Of sufficient thickness, width, and length to
completely support the jack pad or float,
transmit the load to the supporting surface, and
prevent shifting, toppling, or excessive
settlement under load.
k. Fully retract and lock the jacks and the outrigger
beams so they cannot extend when not in use.
l. Operate with extreme caution when using two or
more cranes to lift the same load.
One designated person shall be responsible for
operation when two or more cranes are used to lift
the same load. The designated person shall analyze
the lift and instruct all personnel involved in proper
rigging and positioning of the load and all
movements to be made. Decisions such as the
necessity to reduce crane ratings, load position,
boom position, ground support, and speed of
movements must be in accordance with the
designated person’s decision.
m. Do not lower the load or the boom to a point where
less than three full wraps of wire rope remain on the
respective drum (or as otherwise indicated in local,
state, or federal regulations).
n. Engage the boom hoist pawl when operating with
the boom at a fixed radius.
o. Engage the luffing hoist pawl when operating with
the luffing jib at a fixed radius.
3. While traveling, the operator shall take the following
precautions:
a. Sound the signal horn before traveling and
intermittently while traveling, especially when
approaching personnel.
If equipped, the automatic travel alarm will sound
when the crane is traveled.
b. Carry the boom in-line with the lowerworks and
facing the direction of travel.
c. Do not position the boom so high that it could
bounce over backwards whether traveling with or
without load.
d. Secure the rotating bed against rotation except
when it is necessary to negotiate a turn, and then
only when the operator is seated at controls or the
boom is supported on a dolly.
e. Lash or otherwise restrain unused hooks so they
cannot swing freely.
4. Before traveling with a load, the operator shall take the
following additional precautions:
a. A designated person shall be responsible for
operation. Decisions such as the necessity to
reduce crane ratings, load position, boom position,
ground support, and speed of movements must be
in accordance with the designated person’s
decision.
b. Maintain specified tire pressures (truck cranes).
c. Avoid sudden starts and stops. Use taglines or other
restraints to control the position of the load.
Multiple Load Line Operation
Multiple load line operation is becoming common practice for
applications like panel tilt-up, pile tilt-up, pile driving, rolling
fabricated sections, etc. The multiple lines may be on a
common shaft (each with different parts of line) or on multiple
shafts (lower boom point and upper point, boom point and
fixed jib point, etc).
Manitowoc authorizes multiple load line operation for those
applications requiring it, provided the following steps are
performed:
1. The qualified lift planner and crane operator shall read
and become thoroughly familiar with the appropriate
Capacity Charts and Wire Rope Specification Charts.
2. The lift planner and the crane operator shall make sure
the total load does not exceed the rated capacity given
in the Capacity Chart and Wire Rope Specification Chart
for given boom point or jib point, whichever is less.
EXAMPLE: If one load line is lifting from the jib point, the
proper jib chart applies.
3. The crane must be thoroughly inspected by a qualified
person prior to setup.
4. The crane must be thoroughly inspected for load line
interference caused by routing and reeving of multiple
load lines. If interference is found, it must be eliminated.
5. For cranes produced before 2003, Rated Capacity
Indicators/Limiters were not required by ASME B30.5 for
non-personnel lifting.
To aid the operator in staying within the crane's Capacity
Chart with the total applied load, Manitowoc
recommends that its cranes be equipped with Rated
WARNING
Avoid Over Load and Side Load Damage to Crane
Manitowoc highly recommends that you contact your
Manitowoc dealer for lift planning assistance and
approval.
To Next Page
Loading...
Need help?
General
