Genie Z-34/22IC, Service Manual

Page: 91 / 185

Part No. 128267 Z-34/22 IC 4 - 19
July 2007 Section 4 • Repair Procedures
REV A PRIMARY BOOM COMPONENTS
11 Place a rod through the compression arm pivot
pin and twist to remove the pin.
12 Swing the compression arm up out of the way
and secure it from moving.
13 Tag, disconnect and plug the primary boom lift
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.
14 Support the primary boom lift cylinder with
straps or ropes to restrict it from swinging freely
when the barrel-end pivot pin is removed.
15 Remove the pin retaining fasteners from the lift
cylinder barrel-end pivot pin. Do not remove the
pivot pin.
16 Use the overhead crane to raise the primary
boom 1 inch / 2.5 cm. This will relieve pressure
on the barrel-end pivot pin.
17 Place a rod through the barrel-end pivot pin and
twist to remove the pin.
Crushing hazard. The primary
boom lift cylinder may fall when
the barrel-end pivot pin is removed
if not properly supported by the
overhead crane.
18 Attach a lifting strap from an overhead crane or
similar lifting device to the rod end of the
primary boom lift cylinder. Carefully loosen the
straps and allow the barrel end of the primary
boom lift cylinder to slowly swing down.
19 Carefully remove the cylinder from the machine.
4-4
Extension Cylinder
The extension cylinder extends and retracts the
primary boom extension tube. The extension
cylinder is equipped with counterbalance valves to
prevent movement in the event of a hydraulic line
failure.
How to Remove the
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 on the fitting and/or hose end must be
replaced and then torqued to specification during
installation. Refer to Section 2,
Hydraulic Hose and
Fitting Torque Specifications.
1 Raise the primary boom to a horizontal position.
Then extend the boom approximately
3 to 4 feet / 1 m until the extension cylinder
rod-end pivot pins are accessible.
2 Remove the external snap rings from the
extension cylinder rod-end pivot pins. Use a
soft metal drift to remove the pins.