Boom Assembly Cutaway - Sheet 3 Of 3 - JLG 660SJ Service And Maintenance Manual

SECTION 4 - BOOM & PLATFORM
10. Carefully remove telescope cylinder and sheave assem-
bly. Place telescope cylinder on a suitable trestle.
a. Remove hardware from wear pads. Remove wear
pads from cylinder.
b. Remove hardware from wire rope guard. Remove
guard from cylinder.
c. Remove hardware from sheave pin. Remove pin and
sheave from cylinder.
4-8
Figure 4-14. Boom Assembly Cutaway - Sheet 3 of 3
– JLG Lift –
Figure 4-15. Disassembly of Sheave Assembly
11. Remove hardware securing wear pads to front of base
boom section. Remove wear pads from top, sides, and
bottom of base boom section.
12. Using an overhead crane or suitable lifting device,
remove mid and fly boom sections from base section.
Note: When removing mid and fly boom sections from
base boom section, retract wire rope must be dragged
along with boom sections.
13. Remove hardware which secures wear pads to aft end of
mid boom section. Remove wear pads from top, sides,
and bottom of mid boom section.
14. Remove hardware which secures sheave guards and
sheave assemblies to mid boom section. Remove sheave
assemblies from mid boom section.
15. Remove hardware which secures wear pads to front of
mid boom section. Remove wear pads from top, sides,
and bottom of the mid boom section.
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