JLG 601S Service Manual - Manual (Page 141)

SECTION 4 - BOOM & PLATFORM
3120866 – JLG Lift – 4-11
NOTE: Do not clamp on threads.

3. Install adjusting nuts (or remove nylon collar lock-
nuts if re-adjusting) to both retract and extend wire
ropes.
4. Torque retract adjusting nuts (platform end) to 20
Nm (15 ft. lbs.) alternating between the two wire
ropes and keeping approximately the same amount
of thread beyond the adjusting nut.
NOTE: Do not allow wire rope to rotate. This may damage
the wire rope.
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 0.3 - 0.6 meters using the tele-
scope function. Do not bottom out telescope cylin-
der. Repeat step #5.
8. Extend the boom approximately 0.6 - 0.9 meters
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 0.79 mm (1/32 inch) tol-
erance between wear pad and adjacent surface.
2. Replace wear pads when worn within 1.59 mm (1/16
inch) and 3.18 mm (1/8 inch) - 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.
Figure 4-15. Clamping Wire Ropes
Figure 4-16. Location and Thickness of Wear Pads