Manitowoc Grove GRT880, Operator'S Manual

Page: 53 / 202

Grove
Published 3-25-2020, Control # 643-04
2-37
GRT880 OPERATOR MANUAL SAFETY INFORMATION
2
Make sure good rigging practices are being used. Refuse to
use any poorly maintained or damaged equipment. Never
wrap the hoist cable around a load.
If using a clam bucket, do not exceed 80 percent of the
crane’s capacity.
Make certain the boom tip is centered directly over the load
before lifting.
Make sure the load is well secured and attached to the hook
with rigging of proper size and in good condition.
Check the hoist brake by raising the load a few inches,
stopping the hoist and holding the load. Make sure that the
hoist brake is working correctly before continuing the lift.
When lowering a load always slow down the load’s descent
before stopping the hoist. Do not attempt to change speeds
on multiple-speed hoists while the hoist is in motion.
Watch the path of the boom and load when swinging. Avoid
lowering or swinging the boom and load into ground
personnel, equipment, or other objects.Never leave the
crane with a load suspended. Should it become necessary to
leave the crane, lower the load to the ground and stop the
engine before leaving the operator’s station.
Remember, all rigging equipment must be considered as
part of the load. Lifting capacities vary with working areas. If
applicable, permissible working areas are listed in the
Load
Chart . When swinging from one working area to another,
make sure that Load Chart capacities are not exceeded.
Know your crane!
Stop the hook block from swinging when unhooking a load.
Swinging rapidly can cause the load to swing out and
increase the load radius. Swing the load slowly. Swing with
caution and keep the load lines vertical.
Look before swinging your crane. Even though the original
setup may have been checked, situations do change.
Never swing or lower the boom into the carrier cab (if
applicable).
Never push or pull loads with the crane’s boom. Never drag
a load.
Do not subject crane to side loading. A side load can tip the
crane or cause it to fail structurally.
If the boom should contact an object, stop immediately and
inspect the boom. Remove the crane from service if the
boom is damaged.
When lifting a load the boom may deflect causing the load
radius to increase—this condition is made worse when the
boom is extended. Make sure that the weight of load is within
the crane’s capacity on
Load Chart .
Avoid sudden starts and stops when moving the load. The
inertia and an increased load radius could tip the crane over
or cause it to fail structurally.
Use tag lines (as appropriate) for positioning and restraining
loads. Check the load slings before lifting.
Make sure that everyone is clear of the crane and work area
before making any lifts.
Never swing over personnel, regardless of whether load is
suspended from or attached to the boom.
Hand Signals
A single qualified signal person shall be used at all
times when:
• Working in the vicinity of power lines.
• The crane operator cannot clearly see the load at
all times.
• Moving the crane in an area or direction in which the
operator cannot clearly see the path of travel.
At all times use standardized hand signals (Figure 2-10) that
have been previously agreed upon and completely
understood by the operator and signal person.
If communication with the signal person is lost, crane
movement must be stopped until communications
are restored.
Keep your attention focused on the crane’s operation. If for
some reason you must look in another direction, stop all
crane movement first.
Obey a signal to stop from anyone.