SECTION 4 - BOOM & PLATFORM
31215031
4-17
Disassembly
1.
Remove hardware securing telescope cylinder to aft end
of main boom section.
2.
Remove hardware and wear pads from top, sides, and
bottom of main boom section.
3.
Remove fly boom assembly from main boom using
overhead crane or suitable lifting device.
4.
Remove hardware from telescope cylinder pin. Remove
cylinder pin from fly boom section using a suitable brass
drift and hammer.
5.
Pull telescope cylinder partially from aft end of fly boom.
Secure cylinder with a suitable sling and lifting device at
center of gravity.
6.
Carefully remove telescope cylinder and place on a suit-
able trestle.
NOTE:
The Main Boom Telescope Cylinder can be removed with-
out disassembling the main boom by disconnecting
hydraulic lines, top attaching pin of main boom lift cylin-
der and telescope cylinders as directed above, and pulling
out the telescope cylinder through the access plate open-
ing of the upright.
7.
Remove hardware and wear pads from top, sides, and
bottom of fly boom section.
Inspection
NOTE:
Replace worn or damage components as needed.
1.
Inspect main boom pivot pin for wear, scoring, tapering
and ovality, or other damage. Replace pins if necessary.
2.
Inspect telescope cylinder attach point for scoring,
tapering and ovality. Replace pins if necessary.
3.
Inspect main lift cylinder attach pin for wear, scoring,
tapering and ovality, or other damage. Protect pin sur-
faces before installation. Replace pins if necessary.
4.
Inspect inner diameter of boom pivot bearing for scor-
ing, distortion, wear, or other damage. Replace bearing
if necessary.
5.
Inspect all wear pads for excessive wear or other dam-
age.
6.
Inspect threaded components for stretching, thread
deformation, twisting, or other damage. Replace if nec-
essary.
7.
Inspect structural units of boom assembly for bending,
cracking, separation of welds, or other damage. Replace
boom sections if necessary.
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