Genie Z-51/30J, Service And Repair Manual

Page: 54 / 144

44 Z®-51/
31J
Part No. 1268553GT
October 2020 Service and Repair Manual
Secondary Boom Components
3 Tag, disconnect and plug the hydraulic hoses
on the secondary boom lift cylinder.
WARNING
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.
4 Remove the pin retaining fasteners from the
secondary boom lift cylinder rod-end pivot pin
and barrel-end pivot pin. Do not remove the
pins.
5 Attach a strap from an overhead crane to the
lug on the rod end of the secondary boom lift
cylinder for support. Do not apply any lifting
pressure.
6 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.
7 Use a soft metal drift to drive the rod-end pivot
pin half way out.
8 Remove the secondary boom lift cylinder from
the machine.
WARNING
Crushing hazard. The secondary
boom lift cylinder could become
unbalanced and fall when
removed from the machine if
not properly attached to the
overhead crane.
NOTICE
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.