Printed in U.S.A.
3-38
918070/FP0811
When excavating in confined areas, excavate by
rotating the upper carriage and swiveling the boom
(Figure 3-50).
Figure 3-50 Excavating Trenches Sideways
•
Working alongside trenches and deep excavation
are two applications where the dozer blade might
restrict bucket movement. When working along-
side trenches, lower and place the dozer blade on
the ground to avoid damage to the boom cylinder.
When deep excavating, position the machine so the
lowered dozer blade is on the opposite side of the
excavation (Figure 3-51).
Figure 3-51 Dozer Blade Positioning
Loading Vehicles
When loading vehicles, consider the following:
•
Whenever loading in a confined area with a limited
range of motion, position the truck so maximum
visibility is ensured for the excavator operator.
•
When work conditions permit, position the truck so
the excavator can load material at the rear of the
truck instead of the sides (1, Figure 3-52). The
most effective way to load into the rear of the truck
is when the truck and excavator form a 45° angle
(2, Figure 3-52).
•
Raise the boom and dipper arm to dump height just
before rotating toward the truck.
•
Whenever possible, dump upwind to keep dust and
airborne debris away from the operator, and the
excavator air filters and fans.
Figure 3-52 Loading Vehicles
WARNING
Placing the dozer blade on the opposite
side of the excavation decreases machine
stability. Always consider operator safety
when operating the machine, especially
under less-than-ideal working conditions.
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Summary of Contents for 503Z
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