Hitachi ZX27U-2, Operator'S Manual

Page: 84 / 230

DRIVING THE MACHINE
4-4
TRAVELING ON SOFT GROUND
Avoid traveling on soft ground as much as possible. If
traveling on a soft ground is unavoidable, carefully operate
the machine while observing the following points.
•
Drive the machine as far as the machine can move by
own propelling power. Towing machine may become
necessary. Don’t drive the machine to a deeper loca-
tion than towing machine is possible.
•
In case it becomes impossible for the machine to
travel by own propelling power, lower the bucket to the
ground. While supporting the machine weight with the
boom and the arm, slowly pull the arm to evacuate the
machine. Operate the boom, arm, and travel levers
simultaneously at this time to prevent the machine
from being loaded abnormally.
•
If the track frame bottom come in contact with the
ground, or if mud and/or grabbles are tightly packed
into the undercarriage, the machine may become im-
possible to travel. Raise one side track above the
ground with the boom and arm extended, remove mud
and/or grabbles from the track. Then, evacuate the
machine. Rotate the raised track in forward or reverse
directions alternately to remove the packed rocks
and/or mud from the track.
•
Tow the machine with other machine if the machine
becomes stuck in soft ground and impossible to
evacuate by own propelling power. Refer to the de-
scriptions for TOWING MACHINE on the next page for
the correct rope attaching method.
RAISE ONE TRACK USING BOOM AND ARM
WARNING: Operate the machine carefully. The
machine may slide. Keep the angle between
boom and arm 90
°
to 110
°
and position the
bucket’s round side on the ground.
1. Swing the upperstructure 90
°
2. Position the boom and the arm so that the angle be-
tween them becomes to 90
°
to 110
°
. Push the ground
with the round bucket bottom to raise track off ground.
3. Do not raise the track with the boom and the arm
when the boom is swung.
M1M7-04-005
M1M7-04-006
90 to 110
°