
March 2022
Maintenance Manual
Quarterly Maintenance Procedures
Part No. 1268489GT
S
®
Booms • Z
®
Booms
55
Models with ALC-600 operating system:
Note: Use the following chart to identify the
description of each LCD screen control button
used in this procedure.
Home
Maintenance
Faults
Settings
Low idle
High idle
Gauges
1 Start the engine from the ground controls.
2 Press the
Home
button on the display. Press
button 2 under the engine idle icon and select
low idle.
3 Press button 1 under the gauges icon. Scroll
down to
RPM
and press
Ok
.
Result: Low idle rpm is correct. Continue with
step 4.
Result: Low idle rpm is not correct. Follow the
low rpm idle procedure for your engine model.
4 Press button 2 under the engine idle icon and
select high idle.
Result: High idle rpm is correct.
Result: High idle rpm is not correct. Follow the
high rpm idle procedure for your engine
model.
Models with ALC-1000 operating system:
Note: Use the following chart to identify the
description of each LCD screen control button
used in this procedure.
Plus
Minus
Previous
Enter
1 Start the engine from the ground controls.
2 Press the
enter
or
previous
button on the
LCD screen until engine rpm is displayed.
Result: Low idle rpm is correct. Continue with
step 3.
Result: Low idle rpm is not correct. Follow the
low rpm idle procedure for your engine model.
3 Press and hold the function enable/high
speed button. Note the engine rpm on the
display.
Result: High idle rpm is correct.
Result: High idle rpm is not correct. Follow the
high rpm idle procedure for your engine
model.
All other models:
1 Connect a tachometer to the engine. Start the
engine from the ground controls and check
the rpm.
Result: Low idle rpm is correct. Continue with
step 2.
Result: Low idle rpm is not correct. Follow the
low rpm idle procedure for your engine model.
2 Move the function enable toggle switch to the
high idle (rabbit symbol) position and check
the rpm.
Result: High idle rpm is correct.
Result: High idle rpm is not correct. Follow the
high rpm idle procedure for your engine
model.
Summary of Contents for Genie Lift Guard S-40
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