Check And Adjust The Engine Rpm - Genie S-40 Service Manual

Section 3 • Scheduled Maintenance Procedures
CHECKLIST B PROCEDURES
B-11
Check and Adjust the
Engine RPM
Genie specifications require 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: This procedure will require two people.
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 Genie Industries Service
Department OR your local Ford dealer.
Deutz Models
1 Connect a tachometer to the engine. Start the
engine from the ground controls. Refer to
Section 2 , Specifications.
Skip to step 3 if the low idle rpm is correct.
2 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 re-check the
rpm.
3 Move the function enable/rpm select toggle
switch to the high idle (rabbit symbol) position
at the ground controls. Refer to Section 2 ,
Specifications.
3 - 24
a
If high idle rpm is correct, disregard
adjustment step 4.
4 Loosen the yoke lock nut. Turn the high idle
adjustment nut and solenoid boot
counterclockwise to increase the rpm or
clockwise to decrease the rpm. Tighten the
yoke lock nut and re-check the rpm.
Note: Be sure the solenoid fully retracts when
activating high idle.
Perkins Models
1 Connect a tachometer to the engine. Start the
engine from the ground controls. Refer to
Section 2, Specifications .
S-40 • S-45
October 2013
b c d
a solenoid boot
b high idle adjustment nut
c yoke lock nut
d yoke
e low idle adjustment screw
f low idle lock nut
Part No. 102521
f
e