Elliott Digger Derrick, Руководство по эксплуатации и техническому обслуживанию, Страница: 206 / 376

Four Section Boom Operation-common EEC-0021 V1.3
Four Section Boom Operation
R. Remove the extend cylinder from the boom. Do not allow the sheaves to fall off
the pin on the end of the extend cylinder. Remove extend cables. Place cylinder
and cables in suitable area to prevent possible damage.
S. Loosen and remove two capscrews, cable guide, wear pad and spacer bar from
the front top of the second section.
T. Loosen and remove four capscrews attaching the bottom pad plate to the second
section. Slightly lift third section and remove pad plate.
U. Slide 3
rd
section out of 2
nd
section. Removal of side pads is optional, as the side
pads have adequate clearance for boom disassembly. If removal of side pads is
required, tag all shims, pads and corresponding locations for proper re-assembly.
V. Loosen and remove two capscrews, cable guide wear pad and spacer bar from
the front top of the third section.
W. Loosen and remove four capscrews attaching the bottom pad plate to the third
section. Slightly lift 4
th
section and remove pad plate.
X. Slide 4
th
section out of 3
rd
section. Removal of side pads is optional, as the side
pads have adequate clearance for the boom disassembly. If removal of the side
pads is required. Tag all shims, pads and corresponding locations for proper
reassembly.
Y. Loosen and remove all remaining capscrews and wear pads from sections.
Additional Maintenance, Disassembled Boom
A. Clean all boom sections and inspect for wear, dents, bent or crooked boom
sections, gouged metal, broken welds or any abnormal conditions. Repair or
replace as required.
B. Inspect all sheaves for excessive groove wear or abnormal rim wear. Replace as
required.
C. Inspect all sheave bearings for excessive wear or cut inner liner material. If
installed bearing diameter is .015 inch (.38 mm) larger than pin diameter, bearing
must be replaced. Any cut or gouge which causes the bearing liner to lose
strands is cause for bearing replacement.