Genie Z-30/20N Service And Repair Manual page 40

Service and Repair Manual
Primary Boom Components
3 Support the primary boom lift cylinder with a
suitable lifting device. Place a block of wood
across the upper secondary boom to support
the cylinder when the rod-end pin is removed.
4 Attach an overhead crane to the primary
boom at the platform end for support. Raise
the primary boom using the overhead crane
just enough to relieve the pressure on the
primary boom lift cylinder rod-end pivot pin.
5 Remove the counterweight cover fasteners.
Remove the counterweight cover from the
machine.
6 Place a block of wood between the
counterweight plate on the leveling link and
the cross member of the upper secondary
boom. Carefully lower the secondary boom
onto the block.
Crushing hazard. Keep hands
away from the block and all
moving parts when lowering the
secondary boom onto the block.
7 Remove the pin retaining fasteners from the
primary boom lift cylinder rod-end pivot pin.
Use a soft metal drift to remove the pin.
Crushing hazard. The primary
boom lift cylinder could become
unbalanced and fall if not
properly supported by the lifting
device.
8 Lower the rod end of the cylinder onto the
blocks that were placed on the upper
secondary boom.
30 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
9 Remove the pin retaining fastener from the
ground control side upper secondary leveling
link pivot pin at the upper pivot (same side of
machine as the primary boom lift cylinder
barrel-end pivot pin retainer).
10 Place a rod through the upper secondary
leveling link pivot pin at the upper pivot and
twist to remove the pin.
11 Swing the leveling link up out of the way and
secure it from moving.
12 Tag, disconnect and plug the primary boom lift
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.
13 Support the barrel end of the primary boom lift
cylinder with straps or ropes to restrict it from
swinging freely.
14 Remove the pin retaining fastener from the
primary boom lift cylinder barrel-end pivot pin.
Do not remove the pivot pin.
September 2015
Part No. 1268498