Printed in U.S.A. 3-42 918070/FP0811
Two-Speed Variable Auxiliary
Hydraulic Mode Selection
Upon startup, the auxiliary hydraulic system can be
placed into either the power mode, or the precision
mode. Select the appropriate mode depending upon the
job requirements.
1. Shut down the excavator.
2. To set the auxiliary hydraulics to power mode,
slide and hold the thumb switch (C, Figure 3-57)
on the right joystick to the right and start the
excavator.
3. To set the auxiliary hydraulics to precision mode,
slide and hold the thumb switch (C, Figure 3-57)
on the right joystick to the left and start the
excavator.
Figure 3-57 Right Joystick
4. Continue holding thumb switch (C) until the pro-
portional control indicator (D, Figure 3-58) flashes.
It will flash once when starting in precision mode;
twice when starting in power mode.
Figure 3-58 Proportional Control Indicator
Note: After the excavator is started, it must be shut
down and restarted in order to change between auxil-
iary hydraulic modes.
C
Hold Switch
to the Right
During
Startup for
Power
Mode
Hold Switch
to the Left
During
Startup for
Precision
Mode
D
Model 503Z/603 -- Serial Numbers AJ02993 and Up
Model 503Z/603 -- Serial Numbers to AH02282
D
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