Wire Rope Service Indicator; Jib (If Equipped) - JLG 600SC Service And Maintenance Manual

SECTION 4 - BOOM & PLATFORM
Figure 4-12. Clamping Wire Ropes
2. Install adjusting nuts (or remove nylon collar locknuts if
re-adjusting) to both retract and extend wire ropes.
3. Torque retract adjusting nuts (platform end) to 15 ft-lb
(20 Nm) alternating between the two wire ropes and
keeping approximately the same amount of thread
beyond the adjusting nut.
4. Repeat torque procedure in step #4 to extend wire ropes
(turntable end).
5. Extend boom 2 - 3 feet using telescope function. Repeat
step #4.
6. Retract boom 1 - 2 feet using telescope function. Do not
bottom out telescope cylinder. Repeat step #5.
7. Extend boom approximately 2 - 3 feet again and check
torque on retract wire ropes.
8. Retract boom without bottoming out telescope cylin-
der. Check torque on extend wire ropes.
NOTE: Step #8 and #9 may need to be repeated to equalize the
torque on all 4 wire ropes.
9. After all wire ropes are properly torqued, install nylon
collar locknuts. Remove all clamping devices and install
all covers and guards. Check boom for proper function.

4.14 WIRE ROPE SERVICE INDICATOR

The wire rope service indicator is integrated into the mounting
block that the extension wire ropes mount to at the end of the
base boom. More specifically, the smaller diameter wire rope
mounts to a spring loaded block that also contains a proxy
sensor. In the event that the rope breaks, the block with the
proxy sensor is pushed away from the main mounting block
through the spring which causes a warning light to be lit in the
platform control box. All boom functions are still operable.
4-22

4.15 JIB (IF EQUIPPED)

NOTE: Using a suitable lifting device, support the jib.
Removal
1. For platform and support removal see Section 4.7 - Plat-
form.
2. Position the articulating jib boom level with ground.
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDIATELY AFTER DIS-
CONNECTING LINES TO AVOID ENTRY OF CONTAMINANTS INTO SYSTEM.
3. Tag and disconnect hydraulic lines from level cylinder
and lift cylinder. Use suitable container to retain any
residual hydraulic fluid. Cap hydraulic lines and ports.
4. Remove mounting hardware from slave leveling cylin-
der pin (1). Using a suitable brass drift and hammer,
remove the cylinder pin from jib assembly.
5. Remove mounting hardware from jib assembly boom
pivot pin (2). Using a suitable brass drift and hammer,
remove the pivot pin from boom assembly.
Disassembly
1. Remove mounting hardware from articulating jib boom
pivot pins (3) and (4). Using a suitable brass drift and
hammer, remove the pins from articulating jib boom
pivot weldment.
2. Remove mounting hardware from rotator support pins
(5) and (6). Using a suitable brass drift and hammer,
remove the pins from rotator support.
3. Remove mounting hardware from lift cylinder pin (7).
Using a suitable brass drift and hammer, remove the cyl-
inder pin from articulating jib boom.
3
1
JIB BOOM PIVOT
SLAVE CYLINDER
JIB LIFT CYLINDER
4
2
JIB
7
6
ROTATOR
5
MAE31390
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