Elliott Digger Derrick, Руководство по эксплуатации и техническому обслуживанию, Страница: 210 / 376

Four Section Boom Operation-common EEC-0021 V1.3
Four Section Boom Operation
O. Loop the 1/2/3 extend cable in half and place it on the top of the 3
rd
section with
the loop end towards the sheave case end and the threaded and button end
towards the rear of the section.
P. Install clamp plate and capscrews with the button end of the cable installed in the
anchor slot on the rear top of the 3
rd
section.
Q. Place sheave pin and sheave for the 1/2/3 extend cable in position on the sheave
case end of the boom, inside the loop of cable.
R. Install 3
rd
and 4
th
section boom assembly into 2
nd
section. Slide together
approximately 5 feet (150 cm). Use caution as retract cables and upper extend
cable attached to the 4
th
-3
rd
section assembly slide into the 2
nd
section to prevent
damage or crossing of cables.
S. Assemble bottom front wear pads for 2
nd
section. Attach pads to pad plate.
T. Using appropriate lifting device, lift 3
rd
and 4
th
section assembly to allow for wear
pad/pad plate installation in front of 2
nd
. Install wear pad/pad plate assembly.
Slide sections together within 12 inches (30cm) of full retraction.
U. Install cable guide and spacer to top of 2
nd
section.
V. Install front side wear pads with appropriate shims between 3
rd
and 2
nd
sections.
If boom has been disassembled and no sections have been replaced, use same
shim quantity and location as was previously used. If locations are in question,
refer to shim calibration section in this book. Slide sections fully together.
W. Assemble top rear wear pads to the top of the 3
rd
boom section with the cam
plates and install through the winch mount end of the boom. Install capscrew
through holes in outer boom sections.
X. The wear pads on each side at the top/rear of the boom can be adjusted over a
range of 3/16 inch (4.8mm) by rotating, end for end, the wear pad and plate or
the wear pads and plate independently. This is possible because the holes in
these parts are offset from the center. The hole are .06 inch (1.5mm) off center in
the plate and .03 inch (.8mm) off center in the wear pad. Various combinations of
rotation of these parts allow the adjustment. Plates function as rear side
clearance adjustment.