Hitachi ZAXIS 450LC-3, Operator'S Manual

Page: 155 / 477

DRIVING THE MACHINE
4-5
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
becomes 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
position 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, select slow travel
speed. Carefully move the machine to firm ground.
• Utilize the boom and arm functions to pull the machine
toward firm ground.
• Tow the machine if the machine becomes stuck but only
if the engine is still operating. Be sure to attach a tow
line correctly. (Refer to the “TOWING MACHINE A SHORT
DISTANCE” section on the next page.)
f
NOTE: When raising the machine off the ground with the
front attachment, turn the boom mode switch OFF.
RAISE ONE TRACK USING BOOM AND ARM
d
WARNING: 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 hoe bucket reversed.
Place blocks under machine frame to support the machine.
IMPORTANT: When the machine is modified as a face
shovel by installing the hoe bucket in
reverse, avoid raising the machine above
the ground using the front attachment
with the bucket cylinder fully extended.
Excessive loads will be applied to the pins
around the bucket and the bucket cylinder,
resulting in breakage of the pins.
M104-05-012
M104-05-013
90 to 110˚
90 to 110˚
WRONG
SA-817