Genie Z-30/20N Service Manual page 67

June 2011
REV A
How to Disassemble
the Primary Boom
Note: Complete disassembly of the boom is only
necessary if the outer or inner boom tubes must
be replaced. The extension cylinder can be
removed without completely disassembling the
boom. See 4-4, How to Remove the Extension
Cylinder .
1 Remove the primary boom. See 4-2,
How to Remove the Primary Boom .
2 Place blocks under the extension cylinder for
support.
3 Remove the retaining fasteners from the
extension cylinder barrel-end pivot pin. Use a
soft metal drift to remove the pin.
4 Remove and label the location of the wear pads
from the top side of the boom tube at the
platform end of the boom.
Note: Pay careful attention to the location and
amount of shims used with each wear pad.
5 Support the extension tube with an overhead
crane at the platform end of the boom.
Crushing hazard. The boom
extension tube could fall when
removed from the boom if not
properly supported.
6 Support and slide the extension tube out of the
primary boom tube. Place the extension tube
on blocks for support.
Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
Section 4 • Repair Procedures
PRIMARY BOOM COMPONENTS
Note: During removal, the overhead crane strap
will need to be carefully adjusted for proper
balancing.
7 Remove the external snap rings from the slave
cylinder barrel-end pivot pin.
8 Use a soft metal drift and drive the slave
cylinder barrel-end pivot pin out.
9 Remove the slave cylinder from the primary
extension boom tube.
10 Remove the external snap rings from the
extension cylinder rod-end pivot pins at the
platform end of the extension tube. Use a soft
metal drift to remove the pins.
11 Support and slide the extension cylinder out of
the pivot end of the boom extension tube. Place
the extension cylinder on blocks for support.
Note: During removal, the overhead crane strap
will need to be carefully adjusted for proper
balancing.
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