JLG 800S Service Manual - Manual (Page 231)

SECTION 4 - BOOM & PLATFORM
3121139 – JLG Lift – 4-15
7. Remove the four bolts, shims, and mounting blocks
that secure the telescope cylinder rod to the boom
base section.
WHEN REMOVING THE TELESCOPE CYLINDER FROM THE BOOM,
IT MAY BE NECESSARY 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 FROM THE BOOM. DAMAGE TO COMPONENTS MAY
RESULT FROM FORCIBLE IMPACT WITH THESE ASSEMBLIES.
NOTE: The telescope cylinder weighs approximately 600
lbs. (275 kg).
8. Using overhead cranes or other suitable lifting/sup-
porting devices, carefully pull the telescope cylinder
out from the back of the boom. At the same time,
also pull the cable mount block out so the extension
cables come out with the telescope cylinder and do
not bind. The lifting/supporting devices will have to
be repositioned to support the weight of the cylinder
as it is drawn out of the boom.
9. Push the boom fly sections back in to gain access to
the boom retraction cable.
10. Remove the screws securing the sheave guards to
the boom mid section and remove the sheave
guards.
11. Remove the adjusting nuts and lock nuts from the
opposite end of the retraction cables at the front of
the boom base section. To aid in installing new
retraction cables, fasten a length of tie wire as long
as the retraction cables to the ends of the cables.