October 2018
Maintenance Manual
Quarterly Maintenance Procedures
Part No. 1268489GT
S
®
Booms • Z
®
Booms
73
Note: Use the following chart to identify the
description of each LCD screen control button used
in this procedure.
Plus
Minus
Previous
Enter
Note: Perform this procedure with the machine on
a firm, level surface with the booms in the fully
stowed position and the axles fully extended.
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 Start the engine from the ground controls.
3 Press the
enter
or
previous
button on the
LCD screen until PRIMARY BOOM ANGLE
TO GRAVITY DEGREES is displayed.
4 Place a digital level that has been calibrated to
gravity on top of the primary boom.
5 Raise the primary boom while watching the
display screen.
6 Continue to raise the primary boom until it
stops at approximately 58°.
Result: The reading at the display and digital
level is within ± 2° of each other and of 58°.
Result: The reading at the display and digital
level is greater than ± 2° of each other and of
58°. The primary boom angle sensor must be
calibrated. 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 is
not within ± 2° of 58°,
immediately lower the primary
boom. Failure to lower the boom
could cause the machine to tip
over resulting in death or serious
injury. Refer to Repair Procedure
in the appropriate Service and
Repair Manual for your machine,
How to Calibrate the Primary
Boom Angle Sensor
.
7 Fully raise the secondary boom. The boom is
fully raised when the cylinder is fully extended
and the boom stops moving.
Summary of Contents for S Series
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