JLG 601S, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
3120746 – JLG Lift – 4-3
WHEN REMOVING THE TELESCOPE CYLINDER FROM THE
BOOM, IT MAY BE NECESSARY AT SOME POINT IN ORDER TO
CLEAR ASSEMBLIES MOUNTED WITHIN THE BOOM. CARE MUST
BE TAKEN TO MOVE THE CYLINDER SLOWLY FROM THE BOOM.
DAMAGE TO COMPONENTS MAY RESULT FROM FORCIBLE
IMPACT WITH THESE ASSEMBLIES.
6. Remove bolts securing wire rope attach bar to top of
fly boom section.
7. Pull the telescope cylinder and wire ropes partially
from aft end of the base boom section; secure the
cylinder with a suitable sling and lifting device at
approximately the center of gravity.
8. Carefully remove the telescope cylinder and sheave
assembly. Place telescope cylinder on a suitable
trestle.
a. Remove hardware from the wear pads; remove
wear pads from cylinder.
b. Remove hardware from the wire rope guard;
remove guard from cylinder.
c. Remove hardware from the sheave pin; remove
pin and sheave from cylinder.
9. Remove hardware which secures the wear pads to
the front of base boom section; remove wear pads
from the top, sides and bottom of the base boom
section.
10. Using an overhead crane or suitable lifting device,
remove mid and fly boom sections from base sec-
tion. Note: When removing mid and fly boom sec-
tions from base boom section, retract wire rope
must be dragged along with boom sections.
11. Remove hardware which secures the wear pads to
the aft end of mid boom section; remove the wear
pads from the top, sides and bottom of the mid
boom section.
Figure 4-4. Disassembly of Sheave Assembly