JLG 680S, Service And Maintenance Manual

Page: 290 / 530

SECTION 4 - BOOM & PLATFORM
4-26 3121234
9. Carefully remove the telescope cylinder and sheave
assembly. Place telescope cylinder on a suitable trestle.
a. Remove hardware from the wear pads; remove wear
pads from cylinder.
b. Remove hardware from the wire rope guard;
remove guard from cylinder.
c. Remove hardware from the sheave pin; remove pin
and sheave from cylinder.
9. Remove hardware which secures the wear pads to the
front of base boom section; remove wear pads from the
top, sides and bottom of the base boom section.
10. 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.
11. Remove hardware which secures the wear pads to the
rear end of mid boom section; remove the wear pads
from the top, sides and bottom of the mid boom sec-
tion.
12. Remove hardware which secures the sheave guards and
sheave assemblies to mid boom section, remove sheave
assemblies from mid boom section.
13. Remove hardware which secures the wear pads to the
front of mid boom section; remove wear pads from the
top, sides and bottom of the mid boom section.
14. Using an overhead crane or suitable lifting device,
remove fly boom section from mid section.
NOTE: When removing fly boom section from mid boom section,
retract wire rope must be dragged along with fly boom sec-
tion.
15. Remove hardware which secures the wear pads to the
rear end of fly boom section; remove wear pads from
the top, sides and bottom of the fly boom section.
16. When removing wire rope from fly boom section, push
the cable into fly boom. Route wire rope back through
holes in the side of the fly boom section.
Figure 4-11. Disassembly of Sheave Assembly
Figure 4-12. Disassembly Wire Rope Routing Procedure