Platform Leveling Master Cylinder - Genie S-80 Service Manual

Section 4 • Repair Procedures
BOOM COMPONENTS
4-6
Platform Leveling
Master Cylinder
The master cylinder acts as a pump for the slave
cylinder. It is part of the closed loop hydraulic
circuit that keeps the platform level through the
entire range of boom motion. The master cylinder
is located inside the pivot end of the boom.
How to Remove the Platform
Leveling Master Cylinder
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or the
hose end must be replaced. All connections must
be torqued to specification during installation.
Refer to Section 2, Hydraulic Hose and Fitting
Torque Specifications .
1 Raise the boom until the master cylinder
rod-end pivot pin is accessible.
2 Remove the turntable end cover to access the
master cylinder.
3 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.
4 - 32
4 Remove the pin retaining fastener from the
master cylinder barrel-end pivot pin.
5 Place a rod through the barel-end pivot pin and
twist to remove the pin.
6 Attach a lifting strap from an overhead crane to
the lug on the rod end of the master cylinder.
7 Remove the pin retaining fastener from the
rod-end pivot pin.
8 Place a rod through the rod-end pivot pin and
twist to remove the pin.
9 Remove the master cylinder from the machine.
S-80 • S-85 • S-80X
February 2012
Crushing hazard. The master
cylinder could become unbalanced
and fall if it is not properly
supported by the lifting device
when removed from the machine.
Part No. 122985
1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2
REV B
1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2