JLG X20JP - X600AJ Service Manual - Manual (Page 163)

SECTION 4 - BOOM & PLATFORM
4-10 – JLG Lift – 3121623
4.3 INSPECTION
Checking wear and deformation of ropes
and pulleys
If only one of the following situations is detected the ropes
or pulleys must be replaced.
1. Check that there are no broken threads on the sur-
face of the rope, in the internal area or in correspon-
dence with the cable socket.
Figure 4-12.
2. Check that there are no signs of corrosion on the
rope.
3. Check that there are no signs of kinking, crushing or
deformations of any type on the rope.
Figure 4-13.
4. Check the condition of the fixing pins of the outlet
pulley and extensions return.
5. Check the wear of the pulley grooving using a profile
comparator. As indicated in the figure it is necessary
to check that the outline of the comparator corre-
sponds with the base of the grooving.
Figure 4-14.
6. Check that there are no signs of ovalisation, wear or
any other type of deformation on the pulleys.
Assembly
NOTE: When installing fly section wear pads, install same num-
ber and thickness of shims as were removed during disas-
sembly.
1. Measure inside dimensions of the base and mid
sections to determine the number of shims required
for proper lift.
2. Measure inside dimensions of the mid section to
determine the number of shims required for proper
lift.
3. Install side, top and bottom wear pads to the rear
end of fly section; shim evenly to the measurements
of the inside of mid section.
4. Install retract wire ropes into rear end of fly section,
route wire ropes thru holes in side of fly boom sec-
tion and pull into slot.
Figure 4-15.
5. Install side, top and bottom wear pads to the rear
end of mid section .
WHEN ASSEMBLING BOOM SECTIONS, ENSURE THAT THE BOOM
SLIDING TRAJECTORIES HAVE BEEN CLEARED OF CHAINS,
TOOLS, AND OTHER OBSTRUCTIONS.
6. Slid fly boom section into the mid boom section.
Adjust boom, if necessary, for a total of 1/16 inch
(0.062) clearance.
7. Install wear pads into the forward position of the mid
boom section. Adjust boom, if necessary, for a total
of 2/10 inch (5.08mm) clearance.