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Service and Repair Manual
Platform Components
2-1
Platform Leveling Slave Cylinder
The slave cylinder and the rotator pivot are the two
primary supports for the platform. The slave
cylinder keeps the platform level through the entire
range of boom motion. It operates in a
closed-circuit hydraulic loop with the master
cylinder. The slave cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Remove the Platform
Leveling Slave Cylinder
Note: Before cylinder removal is considered, bleed
the slave cylinder to be sure there is no air in the
closed loop.
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications, Hydraulic Hose and Fitting Torque
Specifications.
1
Extend the boom until the slave cylinder
barrel-end pivot pin is accessible.
2
Raise the boom slightly and place blocks
under the platform for support.
3
Lower the primary boom until the platform is
resting on the blocks just enough to support
the platform. Do not rest the entire weight of
the boom on the blocks.
22
4
Tag, disconnect and plug the hydraulic hoses
from the slave cylinder at the unions and
connect them together using a connector.
5
Remove the pin retaining fastener from the
slave cylinder rod-end pivot pin. Do not
remove the pin. Do not remove the pin.
6
Remove the external snap rings from the slave
cylinder barrel-end pivot pin. Do not remove
the pin.
7
Place a block of wood under the barrel of the
slave cylinder for support. Protect the cylinder
rod from damage.
8
Use a soft metal drift to remove the rod-end
pivot pin.
9
Use a soft metal drift to remove the barrel-end
pivot pin.
10 Carefully pull the cylinder, with hydraulic
hoses, out of the boom.
Z-40/23N, Z-40/23N RJ
September 2016
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.
Crushing hazard. The platform
could fall if not properly
supported.
Component damage hazard.
The slave cylinder rod may
become damaged if it is allowed
to fall if not properly supported
by the lifting device.
Part No. 1268528
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