Genie Z80/60 Service Manual page 146

Section 4 • Repair Procedures
BOOM COMPONENTS
2 Tag, disconnect and plug the hydraulic hoses at
the primary 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.
3 Attach a lifting strap from an overhead crane to
the lug on the barrel end of the primary boom
lift cylinder. Use the overhead crane to raise the
primary boom lift cylinder to a vertical position.
4 Remove the pin retaining fastener from the
primary boom rod end pivot pin.
5 Use a slide hammer to remove the pin. Remove
the primary boom lift cylinder and linkage arms
from the machine.
Crushing hazard. The primary
boom lift cylinder and linkage arms
could become unbalanced and fall
if not properly supported when the
pin is removed.
6 At the platform end, remove the secondary
boom access cover.
7 Tag, disconnect and plug the hydraulic hoses
from the turntable. Cap the fittings.
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
4 - 44
8 Tag and disconnect the electrical cables from
the turntable.
9 Remove the hose protector bracket.
10 Working at the platform end, place blocks under
the barrel end of the secondary boom extension
cylinder for support.
11 Remove the barrel-end retaining fasteners.
12 Using a suitable lifting device, lift the extension
cylinder to clear the saddle blocks
13 Attach a lifting strap from an overhead crane to
the secondary extension boom assembly.
14 Slide the secondary extension boom assembly
out of the secondary boom tube approximately
two feet and remove the wear pads from the
secondary boom tube.
15 Support and slide the extension boom
assembly out of the secondary boom tube and
place it on a structure capable of supporting it.
Crushing hazard. The extension
boom tube could become
unbalanced and fall if not properly
supported when removed from the
primary boom tube.
Note: During removal, the overhead crane strap
will need to be adjusted for proper balancing.
16 To remove the secondary boom extension
cylinder, see 4-9, How to Remove the
Secondary Boom Extension Cylinder .
Z-80/60
June 2011
REV D
Part No. 88619