Check And Adjust The Engine Rpm - Genie GS-3390 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-6
Check and Adjust the
Engine RPM
Genie requires that this procedure be performed
every 250 hours or quarterly, whichever comes
first.
Maintaining the engine rpm at the proper setting for
both low and high idle is essential to good engine
performance and service life. The machine will not
operate properly if the rpm is incorrect and
continued use may cause component damage.
Note: The on-board self diagnostics incorporate a
built-in engine tachometer. The first two digits of
the engine RPM are displayed on the diagnostic
display when the start toggle switch is moved to
the position with the engine running. Engine
START
RPM equals the first two digits multiplied by 100.
Note: Perform this procedure after warming the
engine to normal operating temperature.
Ford models:
Note: The engine rpm is controlled by the ECM
and can only be adjusted by re-programming the
ECM. If rpm adjustment or service is required,
please contact the Genie Industries Service
Department OR your local Ford dealer.
3 - 18
Deutz models:
1 Start the engine from the ground controls.
2 Before serial number GS9004-41523: Move
and hold the start toggle switch to the start
position and check the engine RPM on the
diagnostic display. Refer to Section 2,
Specifications.
After serial number GS9004-41522: Press
and hold the start button and check the engine
RPM on the diagnostic display. Refer to Section
2, Specifications.
Skip to step 6 if the low idle rpm is correct.
3 Release the latches on the engine tray and fully
slide the engine tray out.
4 Insert a 6 inch / 15 cm screwdriver or rod into
the engine tray lock hole located near the
engine tray roller wheels to prevent the engine
tray from moving.
5 Loosen the low idle lock nut and turn the low
idle adjustment screw clockwise to increase the
rpm, or counterclockwise to decrease the rpm.
Tighten the low idle lock nut and repeat step 2.
GS-3390 • GS-4390 • GS-5390
a
b
e c
f d
Deutz models with throttle linkage
a low idle adjustment screw
b low idle lock nut
c yoke
d yoke lock nut
e high idle adjustment lock nuts
f solenoid boot
July 2007
REV G
Part No. 72863