3-18
MACHINE CONTROLS
SY500H Excavator OMM
Joystick Controls
WARNING
Prevent unexpected movement of the machine.
Know the positions and functions of the joysticks
before operation. Failure to follow this warning
could result in death or serious injury.
Left Joystick Buttons
0004690
Figure 3-30
The left joystick has three buttons:
• Optional equipment hydraulic control button (1),
clockwise rotation.
• Optional equipment hydraulic control button (2),
counterclockwise rotation.
• Press the bottom button (3) to operate the horn.
Right Joystick Buttons/Switch
0004682
Figure 3-31
The right joystick has two buttons and a switch:
• The top left button (1) is for power boost, which
temporarily provides extra hydraulic pressure.
• Optional equipment hydraulic control switch (2).
• The bottom left button (3) is not used.
SAE/BHL Joystick Operating Modes
Two operating modes are available for the joysticks:
• Society of Automotive Engineers (SAE) mode. See
• Backhoe Loader (BHL) mode. See “BHL Mode” on
page 3-20.
Pattern Change (SAE/BHL) Valve
NOTICE!
Shut down the engine before adjusting the pattern
change (SAE/BHL) valve. Failure to follow this
notice could damage the machine or cause it to
operate improperly.
The pattern change (SAE/BHL) valve is behind the left
access door, below the engine air filters.
0004684
Figure 3-32
The pattern change (SAE/BHL) valve changes control of
the boom and arm from one joystick to the other. The
SAE mode position is shown above. To change to the
BHL position, pull up on the pin (1) and rotate the bar (2)
counterclockwise. Release the pin to lock the bar in
place.
In SAE mode, the arm is controlled using the left joystick,
and the boom is controlled using the right joystick.
NOTE:
See “SAE Mode” on page 3-19 for additional
information.
In BHL mode, the arm is controlled using the right
joystick, and the boom is controlled using the left joystick.
NOTE:
See “BHL Mode” on page 3-20 for additional
information.
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Summary of Contents for SY500H
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