Genie Z-30/20N Service Manual page 76

Section 4 • Repair Procedures
SECONDARY BOOM COMPONENTS
40 Attach a lifting strap from an overhead crane to
the upper secondary boom.
41 Remove the pin retaining fastener from the
mid-pivot to upper secondary boom pivot pin.
Use a soft metal drift to remove the pin.
42 Remove the upper secondary boom with
compression link from the machine.
Crushing hazard. The upper
secondary boom with
compression link could become
unbalanced and fall when
removed from the machine if not
properly supported by the
overhead crane.
43 Z-30N and Z-30N RJ: Remove the mounting
fasteners from the counterweight attached to
the lower leveling link.
44 Z-30N and Z-30N RJ: Attach a lifting strap from
an overhead crane to the counterweight.
Remove the counterweight from the lower
leveling link.
Tip-over hazard. The counterweight
is critical to machine stability. If
the counterweight is not installed
during reassembly of the machine,
the machine will become unstable
and tip over.
Crushing hazard. The
counterweight could become
unbalanced and fall when
removed from the machine if not
properly supported by the overhead
crane.
4 - 26 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
45 Remove the mounting fasteners from the
function manifold and slide the function manifold
to the side. This will allow access to the
secondary boom lift cylinder barrel-end pivot
pin.
46 Remove the mounting fasteners from the
auxiliary power unit. Do not disconnect the
electrical cables or hydraulic hoses.
47 Slide the auxiliary power unit to the side to
access the other secondary boom lift cylinder
barrel-end pivot pin.
48 Remove the retaining fasteners from the
secondary boom lift cylinder barrel-end pivot
pins.
49 Attach a lifting strap from an overhead crane to
the lug on the rod end of the secondary boom
lift cylinder.
50 Tag, disconnect and plug the hydraulic hoses
from the secondary boom lift 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.
51 Use a slide hammer to remove the barrel-end
pivot pins (access the pins from the access
holes in the bulkheads, one on each side).
Remove the secondary boom lift cylinder from
the machine.
Crushing hazard. The secondary
boom lift cylinder could become
unbalanced and fall when
removed from the machine if not
properly supported by the overhead
crane.
June 2011
REV A
Part No. 139378