61
5. Check the NETT pressure values of both sensors. This should be between -35 and +35PSI. If
not, replace the computer unit.
3.4.4
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.
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 P
on the enclosure) hose to the piston pressure port.
6. Connect the rod-side pressure (
RED R
on the enclosure) hose to the rod pressure port.
POWER UP AND CALIBRATION
NOTE:
Switch the crane power on and verify the LED check lights within the computer unit are
illuminated. 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.
SkyAzúl, Equipment Solutions
www.skyazul.com
301-371-6126
Summary of Contents for Greer MG514
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