JLG X23J - X700AJ Service Manual - Manual (Page 413)

SECTION 4 - BOOM & PLATFORM
4-14 – JLG Lift – 3121448
Three month inspection
1. Remove all protection sumps from the third arm and
the two extensions. Use an electric torch to visually
check the state of the ropes and the extension pul-
leys.
2. Check the correct rope tension, trying to bend them
manually. If they are pulled correctly they should not
be able to move more than a few millimeters.
3. Check that in the extension arms exit phase the
return ropes are sufficiently in traction in a way not to
allow relative contact with the third arm.
4. Vice versa in the extension return phase, check that
the outlet ropes are subject to a tension that allows
them not to come into contact with the second
extension or the cylinder.
5. Use a dynamometric wrench to check the correct
torque of al rope fixing nuts and the respective
rocker arms; recommended torque 10 Nm.
If the tension of the ropes should not be adequate the
conditions for use must be restored by scrupulously fol-
lowing the Ropes Tension Adjustment procedure reported
below.
4.4 ROPES TENSION ADJUSTMENT
PROCEDURE
NOTE: Do not clamp on threads.
Figure 4-22. Clamping Wire Ropes
1. Loosen the register counter-nuts by a few turns,
position them in a way to access the adjustment
nuts in order to make the adjustment. (2 nuts with
relative counter-nut for outlet ropes and one nut with
relative counter-nut for return ropes rocker arm).
2. Completely retract both extendible arms and make
them escape for about 30-40cm.
3. Tighten the nut for the traction of the fixing rocker
arm of the return ropes to a torque of 10Nm.
Figure 4-23. Return ropes fixing rocker arm
4. Completely extend the extensions and retract them
by about 30-40cm.
5. Tighten the bolts of the two output cables so that the
threaded terminals come out of 65±3 mm from the