Primary Boom Angle Sensor - Genie Z80/60 Service Manual

June 2011
REV D
10 Working at the pivot end of the boom, support
and slide the extension cylinder out of the boom
extension.
Crushing hazard. The extension
cylinder could fall when removed
from the extension boom if not
properly supported.
Component damage hazard. Be
careful not to damage the primary
boom angle sensor (PBAS) when
removing the cylinder from the
primary boom.
Component damage hazard.
Hoses and cables can be
damaged if they are kinked or
pinched.
Note: Note the length of the cylinder after removal.
For ease of installation, the cylinder must be at the
same length for reinstallation.
Part No. 88619
4-5

Primary Boom Angle Sensor

A properly functioning primary boom angle sensor
(PBAS) is essential to safe machine operation. The
primary boom angle sensor is used to limit the
angle of the primary boom relative to ground. The
ECM at the ground controls (TCON) monitors the
position and angle of the primary boom using the
signal from PBAS. The PBAS signal is used to
control the ramping of the primary boom as well as
velocity control, limiting the speed of the primary
boom to 1.3 feet / 0.4 meters per second.
How to Replace the Primary
Boom Angle Sensor
Note: Perform this procedure on a firm, level
surface with the boom in the stowed position.
1 Remove the retaining fasteners from the boom
end cover at the pivot end of the primary boom.
Remove the cover from the machine.
2 Locate the primary boom angle sensor inside
the primary boom at the boom pivot pin.
3 Tag and disconnect the electrical connector
from the sensor.
4 Remove the angle sensor mounting bracket
retaining fasteners.
5 Remove the wing nut from the threaded rod. Do
not disconnect the threaded rod from the clevis
yoke.
Z-80/60
Section 4 • Repair Procedures
BOOM COMPONENTS
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