918070/FP0811 3-37 Printed in U.S.A.
Excavating
Proper Bucket Position
Move the flat side of the bucket so it is parallel to the
ground (Figure 3-47).
Figure 3-47 Proper and Improper Bucket Ori-
entations
Proper Digging Technique
1. Lower the bucket into the ground (4, Figure 3-48).
2. After the bucket penetrates the ground, adjust it so
its flat side is parallel to the ground (5, Figure 3-
48).
3. Pull the bucket towards the excavator by:
a. Moving the dipper arm toward the excavator,
and
b. Lowering the boom.
4. After the bucket is sufficiently filled:
a. Continue moving the dipper arm toward the
excavator.
b. Extend the dipper arm cylinder so the bucket is
tilted upward (6, Figure 3-48).
c. Raise the boom.
Figure 3-48 Proper Digging Technique
Trench Excavating
Trench excavating is most efficient when the machine
tracks are parallel to the line of the trench (Figure 3-
49). For larger trenches, excavate each side first and
then the center.
Figure 3-49 Efficient Trench Excavating
Positions 2 and 3 in Figure 3-47 show
improper bucket orientations while
excavating.
Position 2 forces the bucket downward into
the ground, slowing down work and
subjecting the engine and hydraulic pump
to overloading.
Position 3 forces the bucket upward toward
the ground surface, reducing productivity
because of reduced bucket loads.
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