Genie Z-60/34, Service Manual

Page: 96 / 183

4 - 22 Genie Z-60/34 Part No. 75861
November 2003 Section 4 • Repair Procedures
REV A PRIMARY BOOM COMPONENTS
1 Remove the platform.
2 Remove the jib boom.
See 3-1, How to Remove the Jib Boom.
3 Extend the primary boom approximately 5 feet/
1.5 m until the extension cylinder rod-end pivot
pins are accessible.
4 Remove the extension boom end cap mounting
fasteners.
5 Place blocks under the rod end of the
extension cylinder for support.
6 Remove the external snap rings from the
extension cylinder rod-end pivot pins. Use a
soft metal drift to remove the pins.
7 If the function is operational, use auxiliary
power to extend the extension cylinder until the
rod-end clears the end of the extension tube.
8 Tag, disconnect and plug the 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.
9 Place blocks under the barrel end of the
extension cylinder for support.
10 Remove the cotter pin from the extension
cylinder barrel-end pivot pin. Use a soft metal
drift to remove the pin.
11 Support and slide the extension cylinder out of
the extension boom from the platform end.
Crushing hazard. The extension
cylinder could become unbalanced
and 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.