JLG 680S, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
3121234 4-35
12. Using a 3/8 drive extension approximately 4 ft. (1.2 m)
long, install the bolts and washers securing the cable
mount block to the boom fly section. Tape the bolts to
the socket at the end of the extension to prevent it from
coming out of the socket before it engages the mount-
ing threads.
13. Connect all the hydraulic lines to the cylinder as tagged
during the removal procedure.
14. Adjust the boom cables as outlined under Section 4.9,
Boom Rope Torquing Procedures.
15. Run the boom through all lift and telescope functions
and check for proper operation or any leakage.
4.7 MAIN LIFT CYLINDER
Removal
1. Elevate the boom enough to gain access to the lift cylin-
der lower pivot pin.
2. Use an adequate supporting device to support the
weight of the boom and associated components as
shown below.
NOTE: The supporting device must be able to support approxi-
mately 5350 lbs (2430 kg).
3. Tag and disconnect the hydraulic hoses from the lift cyl-
inder.
4. Use an adequate lifting device to support the lift cylin-
der.
NOTE: The lift cylinder weighs approximately 615 lbs. (279 kg).