December 2019
Service and Repair Manual
Boom Components
Part No. 1285305GT
S
®
-60 J
43
6 Tag, disconnect and plug the boom extension
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.
Component damage hazard.
Hoses and cables can be
damaged if they are kinked or
pinched.
7 At the pivot end of the boom, remove the
retaining fasteners and blocks securing the
extend cylinder to the boom tube.
8 At the platform end of the boom, remove the
external snap rings from the extension
cylinder rod-end pivot pin. Use a soft metal
drift to remove the pin.
9 Support and slide the extension cylinder out of
the primary boom.
Crushing hazard. The extension
cylinder could fall when removed
from the extension boom if 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.
4-5
Platform Leveling Master
Cylinder
The platform leveling 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 primary boom
motion. The platform leveling master cylinder is
located inside the upper mid-pivot at the pivot end
of the primary 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 hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications,
Hydraulic Hose and Fitting Torque
Specifications.
1 Remove the cover from the mid-pivot.
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.
Содержание S-60 J
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