JLG 460SJ Service Manual - Manual (Page 268)

SECTION 4 - BOOM & PLATFORM
4-4 – JLG Lift – 3120895
6. Inspect all threaded components for damage such
as stretching, thread deformation, or twisting.
Replace as necessary.
7. Inspect structural units of boom assembly for bend-
ing, cracking, separation of welds, or other damage.
Replace boom sections as necessary.
Assembly
1. Install power track to the attach point on the base
boom section. Secure power track with the attaching
hardware.
2. Install hydraulic lines and electrical cables into the
power track as tagged during disassembly.
3. Install wear pads to the rear of the fly section.
4. Using suitable lifting equipment, slide fly section into
the base section until the telescope cylinder attach
point aligns with holes in side of base section.
NOTE: The fly boom section weighs approximately 430 lbs.
(195 kg).
5. Measure the distance between the telescope cylin-
der port block attach point on base boom section
and the attach point on fly boom section.
6. Connect a suitable auxiliary hydraulic power source
to the telescope cylinder port block.
7. Extend the telescope cylinder the distance of the
two attach points.
8. Secure the sling and lifting device at the telescope
cylinder’s approximate center of gravity, and lift the
cylinder to the aft end of the boom assembly.
NOTE: The telescope cylinder weighs approximately 324
lbs. (147 kg).
9. Slowly slide the telescope cylinder into boom
assembly, align rod end with attach point in fly sec-
tion. Insert pin and secure with retaining ring.
10. Align bolt holes at aft end of base boom section with
telescope cylinder port block. Secure telescope cyl-
inder with hardware.
11. Install wear pads at end of base boom section.
Using shims, adjust the adjustable wear pads to
zero clearance. Adjust pads alternately side to side,