Grading Operation; Avoid Driving Bucket Teeth Into Ground; Avoid Abusive Operation - Hitachi ZX27U-2 Operator's Manual

GRADING OPERATION

Use the blade for soil refilling and general grading opera-
tions after excavation. Grading operation can be also per-
formed by operating the boom, arm, and bucket simulta-
neously.
IMPORTANT: When grading the ground with the
bucket, do not pull or push dirt with the
bucket while traveling the machine like a
bulldozer. Every part of machine may
receive excessively large loads, possibly
resulting in damage to the machine.
When grading by operating the boom, arm, and
bucket simultaneously:
1. When grading from the forward to the backward,
slowly roll in the arm while slightly raising the boom.
As soon as the arm passes the vertical position,
slowly lower the boom so that the bucket can be
horizontally moved.
2. When grading from the backward to the forward, op-
erated the arm and bucket rolled back, as shown.
Grading a slope surface can be performed by operating
the machine in the same method as mentioned above.
AVOID DRIVING BUCKET TEETH INTO
GROUND
WARNING: If the bucket teeth are forcedly driven
into the ground, crushed material may spatter,
possibly resulting in injury of the operator and/or
co-workers around the machine. Furthermore, the
service lifetimes of all front attachment parts may
be shortened.
If the bucket teeth are forcedly driven into the ground, the
service lifetime of all front attachment parts (especially the
bucket) may be severely shortened. When excavating
tightly fastened gravelly soil, use the bucket digging out
force. Operate the boom, arm, and bucket simultaneously
so that the bucket teeth can be effectively penetrated into
the excavation surface. Carefully operate the machine to
prevent crushed material from spattering, possibly resulting
in injury to the operator and/or co-workers around the ma-
chine.

AVOID ABUSIVE OPERATION

If digging force is increased by driving the machine while
pushing the bucket into the ground, or by raising the rear of
the machine to apply the machine weight to the bucket
teeth, severe machine damage may result due to exces-
sive overloading.
OPERATING THE MACHINE
5-12
M1M7-05-012
WRONG
WRONG
M1M7-05-013