JLG 680S, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
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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 oppo-
site 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.
12. Twist the ends of the retraction cables to remove the
ends of the cables from the slots in the side of the boom
fly section.
13. From the rear of the boom, pull out the boom retraction
cables.
Telescope Cylinder/Boom Cable Installation
1. Attach the threaded end of the new retraction cables to
the tie wires used in the removal procedure.
2. From the front of the boom, pull the retraction cables
through the boom and through the attachment holes in
the bottom of the boom base section. Loosely install the
adjustment nuts and jam nuts.
3. Install new retract sheaves, then route the opposite end
of the retraction cables around the sheaves. Push the
ends of the cables through the slots in the side of the
boom fly section.