Genie Z-45/25 Service Manual page 383

First Edition • Second Printing
1 Remove the platform. See 2-1, How to Remove
the Platform .
2 Z-45/25J Models: Remove the jib boom.
See 3-1, How to Remove the Jib Boom.
3 Remove the primary boom. See 3-2, How to
Remove the Primary Boom .
4 Remove the master cylinder. See 4-5, How to
Remove the Master Cylinder .
5 Attach a lifting strap from an overhead crane to
to the lug on the rod end of the primary boom
lift cylinder. Then raise the primary boom lift
cylinder with the crane, to a vertical position.
6 Tag, disconnect and plug the hydraulic hoses at
the primary boom lift cylinder.
7 Remove the pin retaining fastener from the
primary boom lift cylinder barrel-end pivot pin.
8 Use a slide hammer to remove the pin. Remove
the primary boom lift cylinder from the machine.
Crushing hazard. The primary
boom lift cylinder may become
unbalanced and fall if it is not
properly supported by the
overhead crane.
9 Tag, disconnect and plug the hydraulic hoses
on both of the secondary boom lift cylinders.
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.
Part No. 52709
10 Remove the pin retaining fasteners from both
sides of the secondary boom lift cylinder rod-
end pivot pin and barrel-end pivot pin. Do not
remove the pins.
11 Attach a strap from an overhead crane to the
lug on the rod end of one of the secondary
boom lift cylinders for support. Do not apply any
lifting pressure.
12 Use a soft metal drift to drive the barrel-end
pivot pin half way out. Lower the barrel end of
the secondary boom lift cylinder and let it hang
down.
13 Use a soft metal drift to drive the rod-end pivot
pin half way out.
14 Remove the secondary boom lift cylinder from
the machine.
15 Repeat steps 10 through 13 for the other
secondary boom lift cylinder.
16 Attach a lifting strap from an overhead crane to
the upper mid-pivot for support. Do not lift it.
17 Attach a lifting strap from a second overhead
crane to the number 1 arm at the mid-point
between the upper and lower mid-pivots.
Genie Z-45/25 & Genie Z-45/25J
Section 7 • Repair Procedures
SECONDARY BOOM COMPONENTS
Crushing hazard. The secondary
boom lift cylinder may become
unbalanced and fall when it is
removed from the machine if it is
not properly attached to the
overhead crane.
Component damage hazard.
When removing a secondary
boom lift cylinder from the
machine, be careful not to damage
the counterbalance valve at the
barrel end of the cylinder.
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