Maeda MC285C-3 - Page 132

Section 4 – CRANE OPERATION Mini-Crawler Crane M A E D A
4-58 1/2019 MC285C-3
• Do not hoist more than one load at a time.
Even if the load is within the rated total load
limit, multiple loads may be unstable once
they are hoisted. Only hoist one load at a
time and be sure it does not exceed the rated
total load limit.
• Always hoist a load in the shortest length
possible. Hoisting a load over a lengthy
distance may cause the load to become
unbalanced. Use extreme caution if a load
must be hoisted over a lengthy distance.
Hoist the load in as vertical a manner as
possible. Use additional methods, such as
applying a rope to both ends of the load, to
maintain balance.
• Verify that a load connected to a sling or
other retainer device (other than the hook
block) is secure before hoisting the load.
Before hoisting the slung load, check
whether the load is taught with the hook
block. Hoisting a slung load that is not
taught with the hook block may cause the
slung load to detach from the hook block
and fall once the slung load is hoisted.
Fig. 4-162
• Do not hoist a load by pulling it sideways,
drawing it in, or hoisting it diagonally or
laterally using the boom. These conditions
may cause unreasonable force on the
machine and uncontrollable movement of
the load. Only hoist the load when the hook
block and wire rope cable are perpendicular
to the ground.
WARNING! The following safety messages
address a potential Unsafe Operation Hazard
while hoisting or lowering a load:
• Do not continue to hoist a load if the
overwind alarm detector sounds. Stop the
operation immediately and return all
operation levers to the NEUTRAL position.
• Do not hoist a load if the wire rope cable is
twisted. Eliminate the twist in the wire rope
cable before hoisting a load.
• Do not allow the hook block to contact the
boom while hoisting a load. Damage to the
boom, hook block and/or wire rope cables
may result. Always maintain clearance
between the hook block and boom when
hoisting a load.
• Do not allow the hook block to contact the
boom when extending the boom. When
extending the boom, the hook block will
start to move toward the boom. Do not allow
the hook block to contact the boom. Damage
to the boom, hook block and/or wire rope
cables may result. Always maintain
clearance between the hook block and boom
when extending the boom.
• Never use damaged wire rope cable to hoist
or lower a load. The wire rope cable must be
in operation-ready condition to hoist or
lower a load.
• Do not allow the wire rope cable to become
twisted or wind irregularly onto the winch
drum. The wire rope cable must wind
uniformly onto the winch drum to prevent
damage to the wire rope cable.
WARNING! Entanglement Hazard. Always
keep the hook block away from people when it
is not in use. Keep the hook block wound up
and away from people if it is not in use.
WARNING! Tip Hazard. Never allow a hoisted
load to contact an outrigger. Always use
caution to prevent the hoisted load from
contacting an outrigger.