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M A E D A Mini-Crawler Crane Section 2 – SAFETY PRECAUTIONS
3/2019 MC305C-3 2-3
The safety messages that follow have
DANGER level hazards.
Electrocution Hazard
Contact with, or proximity to, an electrically
charged power line will result in death or serious
injury:
・
This unit will not provide protection from contact
with, or proximity to, an electrically charged
power line when the components at the boom
tip are in contact with, or in proximity to, another
power line, ground or pole.
・
All metal and fiberglass components at the
boom tip may become energised.
・
Operators must follow safe electrical work
practices in accordance with their employers’
work rules and applicable government
regulations including:
・ Maintain minimum approach distances
from electrical power lines.
・
Allow for boom, electric line and load sway.
・
If any part of the unit is elevated within the
minimum approach distance of an energised
conductor, all unauthorised personnel must
KEEP CLEAR.
The safety messages that follow have
WARNING level hazards.
Tip / Boom Failure Hazard
Overloading the crane may cause it to tip over or
the boom to fail:
・
Before you try to hoist a load, it is essential that
you know:
・
Boom angle (use boom angle indicator)
・
Working radius (use operating range chart)
・
Boom length (use rated total load chart)
・
Rated total load (use rated total load chart)
・
Never try to hoist a load that exceeds the rated
total load. Rated total load is the mass of the
load plus weight of the winch lines and the
weight of the hook block.
・
Always calculate the total load using the rated
total load chart before you attempt to hoist the
load. Never rely on the moment limiter as the
primary means to determine whether a load is
safe to lift.
・
All the values provided on the rated total load
chart assume that the machine is located on a
level and firm surface. Always use outrigger
pads when you deploy the outriggers on soft or
unpaved surfaces.
・
The values shown in the operating range chart
do not account for boom deflection when the
load is raised. Boom deflection will widen the
working radius. Use the next largest radius on
the operating range chart to account for this.
・
Always extend outriggers before lifting load. If
the terrain is not completely level and you must
adjust the outrigger position to compensate, you
must derate the rated total load by the amount
stated in the "Crane Operation with
Minimum/Medium Outrigger Extension" section
of the
"RATED TOTAL LOAD CHARTS" on
page 3-11. All outrigger monitor lights, other
than the boom stowing lamp, must be on.
・
Always look at the level gauge when setting the
outriggers. Look at the level gauge when
making adjustments during operation. Always
keep the machine body level when operating.
・
Sudden or jerky movement of the travel, crane
or outrigger controls can cause the machine to
tip over. Always operate these controls
smoothly.