Service and Repair Manual
October 2016
Boom Components
62
SX-135 XC
Part No. 1263382
4-4
Extension Cylinder
The primary boom extension cylinder is located
inside the boom assembly and incorporates cables
and pulleys that are responsible for extending the
boom tubes. The extension cylinder is equipped
with counterbalance valves to prevent movement
in the event of a hydraulic line failure.
How to Remove the Primary
Boom Extension Cylinder
Bodily injury hazard. This
procedure requires specific repair
skills, lifting equipment and a
suitable workshop. Attempting
this procedure without these
skills and tools could result in
death or serious injury and
significant component damage.
Dealer service is strongly
recommended.
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 Raise the boom to a horizontal position and
fully retract the primary extension cylinder.
2 Remove the retaining fasteners from the
boom end cover at the pivot end of the boom.
Remove the cover from the machine.
3 Tag and disconnect the limit switch
harnesses. Remove the fasteners to the limit
switch harness mounting bracket and remove
the bracket.
4 Disconnect and remove the string
potentiometer from boom tube #1. Remove
the clevis from the extend cylinder.
Tag and disconnect the harness from cable
tension limit switch 5S (5). (Illustration 1)
Note: The mounting bracket and limit switch can
remain attached to the extend cylinder.
1 Tag, disconnect and plug the hydraulic hoses
from the primary boom extension 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.
Содержание Genie SX-135 XC
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