
Maintenance Manual
March 2022
Quarterly Maintenance Procedures
88
S
®
Booms • Z
®
Booms
Part No. 1268489GT
Q-30
Test the Primary Boom Angle
Sensor - Z-80/60
Genie specifications require that this procedure be
performed quarterly.
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 the angle of
the secondary boom and gravity. 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.
Note: Perform this procedure with the machine on
a firm, level surface.
Note: Use the following chart to identify the
description of each LCD screen control button
used in this procedure.
Plus
Minus
Previous
Enter
1 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position at both ground and platform controls.
2 Press the
enter
or
previous
button on the
LCD screen until primary boom angle is
displayed.
3 Start the engine from the ground controls.
4 Raise the primary boom. The display will
begin showing a boom angle of 40°.
5 Continue raising the primary boom until the
display shows 65°.
Result: The primary boom stops.
Result: The primary boom does not stop.
Immediately release the function enable button
and lower the boom. Calibrate the angle sensor.
Refer to Repair Procedure in the appropriate
Service and Repair Manual for your machine,
How
to Calibrate the Primary Boom Angle Sensor
.
Tip-over hazard. If the boom
does not stop at 65°,
immediately release the function
enable button and lower the
primary boom. Failure to lower
the boom could cause the
machine to tip over resulting in
death or serious injury.
Summary of Contents for Genie Lift Guard S-40
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