Printed in U.S.A.
3-34
918070/FP0811
•
Avoid working with the tracks positioned across the
slope. Position the machine with the blade downhill
and lowered.
•
Avoid swinging or extending the bucket farther
than necessary in a downhill direction. If you must
swing the bucket downhill, keep the boom low and
skid the bucket along the ground.
•
When working with the bucket on the uphill side,
keep the bucket as close to the ground as possible.
Unload far enough away from the excavation to pre-
vent the possibility of a cave-in.
Cold Weather Operation
In cold weather, mud should be removed from the
machine before parking. See “Track Cleaning” on
page 4-23 for cleaning mud off of the tracks. If possi-
ble, park the machine on solid ground, or on wood
planks, to prevent the track or undercarriage from
freezing to the ground.
Operating in Water
Do not operate or immerse the machine in water higher
than the top of the upper track rollers.
Thoroughly grease the machine if it has been operated
in deep water.
Swiveling the Boom
The excavator boom can be swiveled from the front
position 61º to the right and 65º to the left on the 503Z,
and 51º to the right and 75º to the left on the 603. This
allows excavation of trenches along walls, fences, etc.
See Figure 3-43.
Figure 3-43 Boom Swivel Control
Press and hold the auxiliary control button, located on
top of the left joystick. Then press the auxiliary hydrau-
lics pedal (2, Figure 3-43) with your toe or heel. Press-
ing the pedal down to the left swivels the boom to the
left. Pressing the pedal down to the right swivels the
boom to the right.
Bucket controls do not change when swiveling the
boom.
WARNING
Working with the boom swiveled to the side
reduces lifting capacity.
Overloading the bucket can cause an unsta-
ble condition and increases the possibility
of tipping the machine.
1
Serial Numbers
AJ02993 and
after
2
Summary of Contents for 503Z
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Page 94: ...Printed in U S A 4 4 918070 FP0811 Maintenance Label ...