Terex Genie S-60 HF, Service And Repair Manual

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April 2021 Service and Repair Manual
Platform Components
Part No. 1288652GT S ® -60/65 XC ™ • S ® -60/65 HF • S ® -60/65 TraX ™ 35
Platform Components
2-1 Platform Leveling Slave Cylinder 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 boom until the platform is resting
on the blocks just enough to support the
platform.
Note: Do not rest the entire weight of the boom on
the blocks.
4 Remove the pin retaining fastener from the
slave cylinder rod-end pivot pin. Use a soft
metal drift to drive the rod-end pivot pin out.
Crushing hazard. The platform
could fall when the slave
cylinder rod-end pivot pin is
removed if not properly
supported.
5 Remove the external snap rings from the
barrel-end pivot pin.
6 Use a soft metal drift to drive the barrel-end
pivot pin out.
7 Carefully pull the cylinder out of the boom to
access the hydraulic hoses.
8 Tag, disconnect and plug the hydraulic hoses
from the slave cylinder. 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.
How to Bleed the Slave Cylinder
Note: Do not start the engine. Use auxiliary power
for this procedure.
1 Simultaneously activate the boom up function
and the platform level up function until the
boom is fully raised.
2 Simultaneously activate the boom down
function and the platform level down function
until the boom is fully lowered.