Check And Adjust The Engine Rpm - Perkins Models - Genie Z-45/25 Service Manual

August 2005
REV E
A-12
Check and Adjust the
Engine RPM - Perkins Models
Engine specifications require that
this procedure be performed every
100 hours.
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.
This procedure will require two
people.
1 Connect a tachometer to the engine. Start the
engine from the ground controls.
Result: Low idle should be 1600 rpm.
Skip to step 3 if the low idle rpm is correct.
Part No. 77809
Section 3 • Scheduled Maintenance Procedures
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 confirm the
rpm.
a
3 Move the function enable toggle switch to the
high idle (rabbit symbol) position.
Result: High idle should be 2500 rpm.
If high idle rpm is correct, disregard adjustment
step 4.
4 Loosen the yoke lock nut, 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.
Z-45/25 • Z-45/25J
CHECKLIST A PROCEDURES
b c d
a solenoid boot
b high idle adjustment nut
c yoke
d low idle lock nut and adjustment
screw
Be sure the solenoid fully retracts
when activating high idle.
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