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3.5.5 Replacing the Computer Unit
Computer Removal
1. Lower the boom until the boom hoist cylinder is completely retracted and on its stop or the boom
is firmly in the boom rest.
2. Disconnect the hydraulic connections at the computer unit.
3. Disconnect both electrical connectors at the computer unit.
4. Remove the hardware securing the computer to the cab wall.
5. Place the computer on the deck.
Computer Installation
1. Secure the computer unit to the cab wall with the mounting hardware.
2. Ensure the electrical connections face downward.
3. Connect the electrical connectors.
4. Remove the protective caps from the hydraulic ports.
5. Connect the base-side pressure (green band) hose to the piston pressure port.
6. Connect the rod-side pressure (red band) hose to the rod pressure port.
Power Up and Calibration
NOTE: Switch the crane power on and ensure the communication LEDs are flashing and the display
console is operating
.
Checks:
1. Use an inclinometer to, check the accuracy of the boom angle and the radius measurements
and tape at four or five points.
2. Ensure the hydraulic connections are secure and not leaking at the computer unit.
3. Secure the computer lid and rain cover.
4. Refer to
Chapter 2 - Calibration
for more information.
3.6 Display Console Overview
The Operator’s Display Console allows the user to see the crane values (angle, radius, load, etc.) and
crane configuration selection. The display also provides calibration functions used for testing and fault
diagnosis.
3.6.1 Checking the Display Console
To help identify subtle faults that are sometimes difficult to find, please review the following comments.
3.6.2 Unresponsive Buttons
Please note that all button options are not available for use at all times. It is important to verify that the
non-responsive button is programmed to respond during the operation of the System. Press the button
in the center. Pressing the printed symbol ‘at one end’ may not activate the switch underneath. Buttons
that are damaged or have a surface that is worn may cause the switch underneath to operate
improperly. In this case, refer to
SECTION 3.6.6 REPLACING THE DISPLAY CONSOLE
.
