Genie S-40 Service Manual page 111

Section 4 • Repair Procedures
How to Disassemble the Boom
Note: Complete disassembly of the boom is only
necessary if the secondary boom tube 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 boom. See 4-2, How to Remove the
Boom.
2 Place blocks under the extension cylinder for
support.
3 Remove the external snap rings from the
extension cylinder barrel-end pivot pin at the
pivot end of the primary boom tube. Use a soft
metal drift to remove the pin.
4 Remove and label the wear pads from the top
side of the primary 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 Attach a lifting strap from an overhead crane to
the secondary boom tube at the platform end of
the boom for support.
6 Support and slide the secondary boom tube out
of the primary boom tube. Place the secondary
boom tube on blocks for support.
Crushing hazard. The secondary
boom tube could become
unbalanced and fall when removed
from the primary boom tube if not
properly supported.
Note: During removal, the overhead crane strap will
need to be carefully adjusted for proper balancing.
7 Remove and label the wear pads from the top
side of the secondary boom tube at the platform
end of the boom.
4 - 20
8 Remove the trunnion pin retaining fasteners at
the base end of the secondary boom tube. Use
a slide hammer to remove the trunnion pins.
9 Carefully rotate the base end of the extension
cylinder until the pin mounting bore is in a
vertical position.
10 Remove the external snap rings from the
extension cylinder rod-end pivot pin at the
platform end of the secondary boom tube. Use a
soft metal drift to remove the pin.
11 Support and slide the extension cylinder out of
the base end of the secondary boom tube.
Place the extension cylinder on blocks for
suppport.
Note: During removal, the overhead crane strap will
need to be carefully adjusted for proper balancing.
12 Remove the label the wear pads from the
extension cylinder.
Note: Pay careful attention to the location of each
wear pad.
S-40 • S-45
October 2013
Crushing hazard. The extension
cylinder may become unbalanced
and fall when removed from the
secondary boom tube if not
properly supported.
Part No. 102521