Perkins 104-22 Engine; Rpm Adjustment; Flex Plate - Genie Z-45/25 Service Manual

First Edition • Second Printing
8-1

RPM Adjustment

Refer to Maintenance Procedures, A-22,
Check and Adjust the Engine RPM.
8-2

Flex Plate

The flex plate acts as a coupler between the
engine and the pump. It is bolted to the engine
flywheel and has a splined center to drive
the pump.
a
a pump
b pump shaft
c coupler
d flex plate with raised spline
e flywheel
1
f /
16
Part No. 52709
c e
b d
f
inch (1.5 mm) gap
Genie Z-45/25 & Genie Z-45/25J

Perkins 104-22 Engine

How to Remove the Flex Plate
1 Disconnect the wiring plug at the electronic
displacement controller (EDC), located on
the drive pump.
2 Support the drive pump with an appropriate
lifting device. Then remove all of the pump
mounting plate to engine bell housing bolts.
3 Carefully pull the pump away from the engine
and secure it from moving.
4 Remove the flex plate mounting fasteners,
then remove the flex plate from the engine
flywheel.
How to Install the Flex Plate
1 Install the flex plate onto the engine flywheel
with the raised spline towards the pump.
Torque the flex plate mounting bolts to 34 ft-lbs
(46 Nm).
2 Install the pump coupler onto the pump shaft
with the set screw toward the pump. Leave a
1
/ inch (1.5 mm) gap between the pump
16
coupler and pump end plate.
®
3 Apply Loctite
pump coupler set screw. Torque the set screw
to 45 ft-lbs (61 Nm).
4 Install the pump and torque the pump mounting
plate fasteners to 34 ft-lbs (46 Nm).
Section 7 • Repair Procedures
removable thread sealant to the
Component damage hazard. Do
not force the drive pump during
installation or the flex plate teeth
may become damaged.
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