Operating Techniques - Doosan DX700LC Operation And Maintenance Manual

OPERATING TECHNIQUES

Lifting
IMPORTANT
There may be local or government regulations, about the
use of excavators for the lifting of heavy loads. Always
contact your local and government agencies in regards to
these regulations.
To prevent injury, do not exceed the rated load capacity of the
machine. If the machine is not on level ground, load capacities
will vary.
Short slings will prevent excessive load swing.
Use the lifting eye on the bucket that is provided to lift objects.
Always try to maintain the lifting eye (Figure 90) straight below
the center line of the arm and bucket pin. In this manner the
weight of the load is being primarily held only by the pin, and not
by the bucket cylinder, link, and link pins.
When a lifting eye is used, the sling/lifting device must be
fastened to the eye in a manner that will not allow it to come
loose.
The most stable position is over the corner of the machine.
For best stability, carry a load as close to the ground and
machine as possible.
Lift capacity decreases as the distance from the machine swing
center line is increased.
Lifting Unknown Weight
When loads are not accurately known are to be lifted, the person
responsible for the job shall ascertain that the weight of the load
does not exceed the machine LOAD RATING CHART at the
radius at which it is to be lifted.
It is recommended that you feel your way into any lift as a
precaution against tip-over. One method is to position the boom
at 90° over the side of the machine. Slowly lift the load until it
clears the ground. A lift over the side is the most unstable, and
as the load is swung into the front zone of the excavator it will
become more stable. DO NOT INCREASE SWING RADIUS
AFTER THE LOAD IS LIFTED.
If a load is picked up from the front zone and swung into the
side zone, a tip-over could result causing a deadly or fatal
injury.
Operation
3-40
DANGER
Figure 90
FRONT LIFT
ZONE
SIDE LIFT
ZONE
REAR LIFT
ZONE
Figure 91
HAAD3830
SIDE LIFT
ZONE
HAAD3842
OP001122