SECTION 4 - BOOM & PLATFORM
3121784
4-9
Inspection
1.
Inspect all boom pivot pins for wear, scoring or
other damage, and for tapering or ovality.
Replace pins as necessary.
2.
Inspect lift cylinder pins for wear, scoring or
other damage, and for tapering or ovality.
Ensure pin surfaces are protected prior to instal-
lation. Replace pins as necessary.
3.
Inspect telescope cylinder rod attach pin for
wear, scoring or other damage. Replace pin as
necessary.
4.
Inspect inner diameter of boom pivot bushings
for scoring, distortion, wear or other damage.
Replace bushings as necessary.
5.
Inspect wear pads for wear.
6.
Inspect all threaded components for damage
such as stretching, thread deformation, or twist-
ing. Replace as necessary.
7.
Inspect structural units of boom assembly for
bending, cracking, separation of welds, or other
damage. Replace boom sections as necessary.
Assembly of the Main Boom
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.
3.
Install wear pads to the aft end of the fly section.
4.
Using suitable lifting equipment, slide fly section
into the base section until power track attach
point aligns with holes in side of base section.
5.
Attach the power track to the aft end of fly boom
section. Secure power track with the attaching
hardware.
6.
Using suitable lifting equipment, slide fly boom
section out to gain access to telescope cylinder
attach pin hole.
7.
Measure the distance between the telescope
cylinder port block attach point on base boom
section and the attach point on fly boom sec-
tion.
8.
Connect a suitable auxiliary hydraulic power
source to the telescope cylinder port block.
9.
Extend the telescope cylinder the distance of the
two attach points.
10.
Secure the sling and lifting device at the tele-
scope cylinder’s approximate center of gravity,
and lift the cylinder to the aft end of the boom
assembly.
NOTICE
WHEN INSERTING THE TELESCOPE CYLINDER INTO THE BOOM, CARE
MUST BE TAKEN NOT TO DAMAGE THE POWER TRACK ASSEMBLY.
11.
Slowly slide the telescope cylinder into boom
assembly, align rod end with attach point in fly
section. Insert pin and secure with retaining ring.
12.
Slowly slide the telescope cylinder into boom
assembly, align barrel end with attach point in
fly section. Insert pin and secure with retaining
ring.
13.
Install wear pads at front of base boom section.
Adjust the wear pads to zero clearance.
14.
Adjust pads alternately side to side, so that fly
boom section is centered in base boom section
(lower wear pad with 1 mm gap).
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