Genie GS-2669 RT Service Manual page 100

Section 4 • Repair Procedures
Perkins 403D-11 Engine
6-1
Engine RPM
How to Adjust the RPM
1 Start the engine from the ground controls.
2 Hold the start toggle switch to the start position
and check the engine RPM on the diagnostic
display. Refer to Section 2, Specifications .
Proceed to step 4 if the low idle is correct.
3 To correct the low idle speed, loosen the locknut
on the low idle adjustment screw. Turn the low
idle adjustment screw on the linkage clockwise
to increase rpm or counterclockwise to
decrease rpm. Tighten the lock nut and recheck
the rpm. See the illustration.
4 Move the engine idle control switch to high idle
(rabbit symbol) from the ground controls.
5 Hold the start toggle switch to the start position
and check the engine RPM on the diagnostic
display. Refer to Section 2, Specifications .
6 To correct the high idle speed, loosen the yoke
lock nut on the high idle solenoid, then 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 recheck the rpm. See the
illustration.
Note: Be sure the solenoid fully retracts when
activating high idle.
4 - 30 GS-2669 RT • GS-3369 RT • GS-4069 RT
November 2014
a solenoid
b yoke locknut
c yoke
d low idle lock nut
e low idle adjustment screw
Part No. 229753