Terex Genie Z-45/25 Bi-Energy, Service Manual

Page: 91 / 213

Part No. 237062 Z-45/25 Bi-Energy • Z-45/25J Bi-Energy 4 - 19
September 2015 Section 4 • Repair Procedures
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
Note: 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 2,
Hydraulic Hose and Fitting
Torque Specifications.
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.
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.
3 Attach overhead crane or similar lifting device to
the master cylinder.
4 Remove the pin retaining fasteners from the
master cylinder barrel-end pivot pin.
5 Place a rod through the barrel-end pivot pin and
twist to remove the pin.
6 Remove the pin retaining fastener from the rod-
end pivot pin.
7 Place a rod through the rod-end pivot pin and
twist to remove the pin.
8 Remove the master cylinder from the machine.
Crushing hazard. The master
cylinder could become unbalanced
and fall if not properly attached to
the overhead crane.
PRIMARY BOOM COMPONENTS