Genie Z-30/20N Service And Repair Manual page 42

Service and Repair Manual
Primary Boom Components
3 Remove the external snap rings from the
extension cylinder rod-end pivot pins. Use a
soft metal drift to remove the pins.
4 Remove the counterweight cover fasteners.
Remove the counterweight cover from the
machine.
5 Raise the secondary boom until the master
cylinder rod-end pivot pin is accessible.
6 Remove the primary boom extend drive limit
switch from the pivot end of the primary boom.
Do not disconnect the wiring.
7 Remove the retaining fastener from the
master cylinder rod-end pivot pin. Use a soft
metal drift to remove the pin.
8 Manually retract the master cylinder and push
it toward the platform end of the boom to
obtain enough clearance for extension
cylinder removal.
9 Tag, disconnect and plug the primary boom
extension 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.
10 Remove the retaining fastener from the
extension cylinder barrel-end pivot pin. Use a
soft metal drift to remove the pin.
32 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
11 Carefully pull out and properly support the
extension cylinder from the primary boom with
a lifting strap from an overhead crane.
Crushing hazard. The extension
cylinder could fall when removed
from the extension boom if not
properly supported.
Component damage hazard. Be
careful not to damage the
counterbalance valves on the
primary boom extension cylinder
when removing the cylinder from
the primary boom.
Component damage hazard.
Hoses and cables can be
damaged if the primary boom
extension cylinder is dragged
across them.
Note: Note the length of the cylinder after removal.
The cylinder must be at the same length for
installation.
September 2015
Part No. 1268498