Platform Leveling Master Cylinder - Genie Z-45/25 Service Manual

Section 7 • Repair Procedures
PRIMARY BOOM COMPONENTS
7 Place a rod through the barrel-end pivot pin and
twist to remove the pin.
8 Support and slide the extension cylinder out of
the upper pivot.
Crushing hazard. The extension
cylinder will fall when it is removed
from the extension boom if it is not
properly supported.
Component damage hazard. Be
careful not to damage the
counterbalance valves on the
primary boom extension cylinder
when removing the cylinder from
the primary boom.
Component damage hazard.
Hoses and cables can be
damaged if the primary boom
extension cylinder is dragged
across them.
Note the length of the cylinder
after removal. The cylinder must
be at the same length for
installation.
7 - 32
4-5
Platform Leveling
Master Cylinder
The master cylinder acts as a pump for the slave
cylinder. It's part of the closed circuit hydraulic loop
that keeps the platform level through the entire
range of boom motion. The master cylinder is
located at the base of the primary boom.
How to Remove the Platform
Leveling Master Cylinder
1 Raise the secondary boom until both the rod-
end and barrel-end pivot pins on the master
cylinder are accessible.
2 Tag, disconnect and plug the master cylinder
hydraulic hoses. Cap the fittings on the
cylinder.
Genie Z-45/25 & Genie Z-45/25J
First Edition • Second Printing
When removing a hose assembly
or fitting, the O-ring on the fitting
and/or hose end must be replaced
and then torqued to specification
during installation.
Refer to Section Two, Hydraulic
Hose and Fitting Torque
Specifications.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
Part No. 52709