Genie Z80/60 Service Manual page 122

Section 4 • Repair Procedures
PLATFORM COMPONENTS
3 Lower the jib boom until the platform is resting
on the blocks just enough to support the
platform.
Note: Do not rest the entire weight of the boom on
the blocks.
4 Tag, disconnect and plug the hydraulic hoses
from the platform leveling cylinder at the
bulkhead fittings located inside the boom tube
at the platform end. Cap the bulkhead fittings
on the boom tube.
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.
5 Remove the pin retaining fasteners from
the platform leveling cylinder rod-end pivot pin.
Do not remove the pin.
6 Remove the external snap rings from the barrel-
end pivot pin. Do not remove the pin.
7 Support and secure the jib boom cylinder to the
jib boom with a strap or other suitable device.
Protect the cylinder rod from damage.
Crushing hazard. The jib boom
cylinder will fall if not properly
supported when the platform level
cylinder rod-end pivot pin is
removed.
4 - 20
8 Use a soft metal drift to remove the barrel-end
pivot pin.
Crushing hazard. The platform
and jib boom will fall when the
platform leveling cylinder barrel-
end pivot pin is removed if not
properly supported.
9 Support the rod end of the platform level
cylinder.
10 Use a soft metal drift to tap the platform level
cylinder rod-end pivot pin half way out and
lower one of the leveling arms to the ground.
Tap the pin the other direction and lower the
opposite leveling arm. Do not remove the pin.
11 Use a soft metal drift to remove the platform
level cylinder rod-end pivot pin.
12 Carefully pull the platform leveling cylinder out
of the boom.
Crushing hazard. The jib boom
cylinder will fall if not properly
supported when the platform level
cylinder rod-end pivot pin is
removed.
How to Bleed the Platform
Leveling Cylinder
Note: Do not start the engine. Use auxiliary power
for all machine functions in this procedure.
1 Raise the jib boom to a horizontal position.
2 Push the platform level up and down buttons
through two complete platform leveling cycles
to remove any air that might be in the system.
Z-80/60
June 2011
REV C
Part No. 88619