JLG 680S, Service And Maintenance Manual

Page: 298 / 530

SECTION 4 - BOOM & PLATFORM
4-34 3121234
4. Install the sheave guards and secure them in place with
the retaining screws.
5. Pull the boom sections out to approximately where they
were extended to for telescope cylinder removal.
6. Install a new extend sheave on the end of the telescope
cylinder.
7. Route new extend cables around the telescope cylinder.
Loosely fasten the threaded end of the cables to the rod
end of the telescope cylinder with the adjusting nuts
and lock nuts. Install the opposite end of the cables in
the cable mount block.
8. Use tape or tie straps to fasten the cables to the tele-
scope cylinder assembly. It is important that the tape or
straps be strong enough to hold the cable in place yet
weak enough to break and fall away when the cables are
adjusted.
WHEN PUSHING THE TELESCOPE CYLINDER INTO THE BOOM, IT MAY BE NEC-
ESSARY AT SOME POINT TO TURN THE CYLINDER SLIGHTLY IN ORDER TO
CLEAR ASSEMBLIES MOUNTED WITHIN THE BOOM. CARE MUST BE TAKEN TO
MOVE THE CYLINDER SLOWLY INTO THE BOOM. DAMAGE TO COMPONENTS
MAY RESULT FROM FORCIBLE IMPACT WITH THESE ASSEMBLIES.
NOTE: The telescope cylinder weighs approximately 496 lbs.
(225 kg).
9. Using adequate lifting equipment, carefully push the
telescope cylinder assembly and cables back into the
boom.
10. Apply JLG Threadlocker P/N 0100011 to the bolts and
fasten the telescope cylinder barrel to the boom mid
section with the bolts, shims, mounting blocks.
11. Apply JLG Threadlocker P/N 0100011 to the bolts and
fasten the telescope cylinder rod to the boom base sec-
tion with the bolts, shims, mounting blocks.