Primary Boom Lift Cylinder - Genie ZX-135/70 Service Manual

August 2014
17 Use a soft metal drift to tap the pin halfway
out and lower one of the linkage arms down.
Tap the pin in the other direction and lower
the other linkage arm down.
Crushing hazard. The upper
primary boom lift cylinder linkage
arms could fall if not properly
supported when the pivot pins are
removed.
18 Attach a 5 ton / 5000 kg overhead crane to
both ends of the primary boom. Do not apply
any lifting pressure.
19 Remove the pin retaining fasteners from the
primary boom pivot pins.
20 Use a soft metal drift to remove the primary
boom pivot pins.
21 Carefully remove the primary boom from the
machine and place it on a structure capable of
supporting it.
Crushing hazard. The primary
boom could become unbalanced
and fall when removed from the
machine if not properly attached
to the overhead crane.
Part No. 218700
4-4

Primary Boom Lift Cylinder

The primary boom lift cylinder raises and lowers
the primary boom. The primary boom lift cylinder is
equipped with a counterbalance valve to prevent
movement in the event of a hydraulic line failure.
How to Remove the Primary
Boom Lift 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.
Note: Perform this procedure with the boom in the
stowed position.
1 Remove the hose and cable clamps from the
primary boom lift cylinder.
2 Remove the cable track retaining fasteners at
the primary boom lift cylinder.
3 Place blocks under both ends of the primary
boom lift cylinder. Place another block under
the cylinder linkage arms under the primary
boom lift cylinder barrel-end pivot pin.
ZX-135/70
Service Manual
Boom Components
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.
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