Hitachi EX1900-5, Operator'S Manual

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DRIVING THE MACHINE
4-7
OPERATING ON SOFT GROUND
•
Avoid traveling on very soft ground that does not have
sufficient strength to firmly support the machine.
•
If the machine is operated on very soft ground or be-
comes stuck, it may be necessary to clean the track
frame area.
•
Swing the upperstructure 90° and lower the bucket to
raise one track off the ground. Make sure to keep the
angle between the boom and arm 90 to 110° and posi-
tion the bucket’s round side on the ground.
•
Rotate the raised track back and forth to remove mud
and dirt.
•
After lowering the track to the ground, move the
engine speed control lever to the medium speed
position and slow travel speed. Carefully move the
machine to firm ground.
•
Tow the machine if it becomes stuck but can still
operate its engine. Be sure to attach a towing wire
correctly.
RAISE ONE TRACK USING BOOM AND ARM
CAUTION: Keep the angle between boom and
arm 90 to 110° and position the bucket’s round
side on the ground.
Swing the upperstructure 90° and lower the bucket to raise
track off ground. Do not dig bucket teeth into the ground
when using the loader bucket.
Place blocks under machine frame to support the machine.
IMPORTANT: When the machine is equipped with the
loading shovel front attachment, don’t
raise the machine off the ground by
bucket tooth force with the bucket cylin-
der fully retracted. Failure to do so will
cause excessive loads to be applied to
the bucket pins and cylinders so that
damage to the pins may result.
M145-05-007
M145-05-025
M145-05-007
M145-05-025
M146-05-001
Arm
90 to
110
°
Boom
90 to
110
°
Boom
Arm
Arm
90 to
110
°
Boom
Arm
90 to
110
°
Boom