Operation and maintenance manual
DX140R/DX140LCROperation
3-42
Lifting Unknown Weight
When loads are not accurately known are to be lifted, the person
resp
onsible 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
pr
ecautio
n 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.
Lifting Known Weight
The load chart is the governing factor when lifting known
w
e
ights. It is recommended that you feel your way into any lift as
a precaution against tip-over. Whenever possible, lift and swing
payloads between the front idler area.
Pick and Carry
The machine can pick and carry payloads without added labor.
We re
commend when traveling with a suspended payload, you
evaluate the prevailing conditions and determine the safety
precautions required in each case. The following factors must be
considered before attempting to pick and carry a load.
Align the boom with the forward dire
ction of machine travel.
Maintain this boom position when turning the machine. Turn only
when necessary, at the slowest speed, and at a wide turning
radius.
1. Use the shortest lifting radius distance possible.
2. Keep the load as close to the ground as conditions will
per
mit.
3. Provide tag lines to prevent load from pendulating.
Pendulatin
g can cause a change in radius. A change in
radius could exceed the load chart rating or cause a tip
over condition.
4. Govern travel speed to suit conditions.
5. Avoid sudden starts and stops.
FRONT LIFT
ZONE
SIDE LIFT
ZONE
SIDE LIFT
ZONE
REAR LIFT
ZONE
HAAD3842
Figure 95
DANGER
AVOID DEATH
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.