SkyAzúl Greer MG514, Installation, Calibration, And Service Manual

Page: 61 / 90

58
Check Boom Angle
1. Fully retract the boom.
NOTE: The required accuracy of measured angles is within 0.2°. When taking boom angle
measurements use a good quality inclinometer. Many inclinometers are only accurate at 0° (level).
Ensure a reliable position on the top of the boom is used to measure the angle and that the
inclinometer will provide an accurate reading at 0° (zero) and at 70°.
2. Using an inclinometer set the boom to 0° (zero) and ensure the displayed boom angle value is
0.0°. If the angle value is not 0.0°, follow SECTION 3.8.5 CHECKING THE ANGLE SENSOR
PENDULUM.
3. Raise the boom to a high angle (at least 70°) and measure the angle with the inclinometer.
Ensure the displayed angle matches the inclinometer reading within 0.2°. If the displayed angle
is incorrect, refer to SECTION 3.10.4 SPAN CALIBRATION.
Check Pressure Sensors
The pressure sensing system is calibrated at the factory. Pressure sensors are not able to be replaced.
Any serious problem will necessitate changing the entire computer unit.
1. Lower the boom until the boom hoist cylinder is fully retracted and on its stop.
2. Loosen the hydraulic connections to the pressure sensors to ensure zero pressure is present on
the sensors.
3. Enter the CALIBRATION MODE and use the “PRESSURE MONITOR” command to view both
sensor pressures and net pressure.
4. Check the PRESSURE values of both sensors. The PRESSURE values should be between -75
and +75 PSI. If not, replace the computer unit.
5. Check the NETT pressure values of both sensors. This should be between -35 and +35 psi. If
not, replace the computer unit.
SkyAzúl, Equipment Solutions www.skyazul.com 301-371-6126