JLG 600SC_660SJC Service Manual - Manual (Page 42)

SECTION 4 - BOOM & PLATFORM
4-2 – JLG Lift – 3120898
5. Repeat the torque procedure in step #4 to the
extend wire ropes (turntable end).
6. Extend the boom 2 - 3 feet using the telescope func-
tion. Repeat step #4.
7. Retract the boom 1 - 2 feet using the telescope func-
tion. Do not bottom out telescope cylinder. Repeat
step #5.
8. Extend the boom approximately 2 - 3 feet again and
check torque on the retract wire ropes.
9. Retract the boom without bottoming out telescope
cylinder and check torque on the extend wire ropes.
NOTE: Step #8 and #9 may need to be repeated to equalize
the torque on all 4 wire ropes.
10. After all wire ropes have been properly torqued,
install nylon collar locknuts. Remove all clamping
devices and install all covers and guards. Check the
boom for proper function.
4.3 WEAR PADS
Main Boom
1. Shim up wear pads to within 1/32 inch (.79 mm) tol-
erance between wear pad and adjacent surface.
2. Replace wear pads when worn within 1/16 inch (1.59
mm) and 1/8 inch (3.18 mm) - B, C, D of threaded
insert. See Location and Thickness Of Wear Pads.
3. Adjusting wear pads, removing or adding shims,
bolt length must also be changed.
a. When adding shims, longer bolts must be used
to ensure proper thread engagement in insert.
b. When shims are removed, shorter bolts must be
used so bolt does not protrude from insert and
come into contact with boom surface.
Figure 4-4. Location and Thickness of Wear Pads