JLG X20JP - X600AJ Service Manual - Manual (Page 159)

SECTION 4 - BOOM & PLATFORM
4-6 – JLG Lift – 3121623
4.2 BOOM DISASSEMBLY X20JP - X600AJ
NOTE: The following procedure assumes the boom is removed
from the machine.
1. Extend the boom approximately 2 feet (0.6 m). This
will enable access to the bolts that secure the cable
mount block to the boom fly section.
2. Remove hardware securing the telescope cylinder.
Figure 4-4.
NOTE: Do not allow wire rope to rotate. This may damage the
wire rope.
3. Clamp both threaded ends of wire rope to prevent
rotation. Note: Do not clamp on threads. Remove
jam nuts and nuts which secure the wire rope
adjustments to the bottom front of the base boom
section.
4. Using a M6 drive extension approximately 4 feet (1.2
m) long, remove the bolts and washers securing the
cable mount block to the boom fly section.
Figure 4-5.
5. Remove the four bolts, shims, and attachment
blocks that secure the telescope cylinder barrel to
the boom mid section.
Figure 4-6.
6. Remove the four bolts, shims, and mounting blocks
that secure the telescope cylinder rod to the boom
base section.
Figure 4-7.
WHEN REMOVING THE TELESCOPE CYLINDER FROM THE BOOM,
IT MAY BE NECESSARY AT SOME POINT TO TURN THE CYLINDER
SLIGHTLY IN ORDER TO CLEAR ASSEMBLIES MOUNTED WITHIN
THE BOOM. CARE MUST BE TAKEN TO MOVE THE CYLINDER