Mec 34-J Diesel, Руководство по обслуживанию и запасным частям

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Page 79 34-J Desel - Servce & Parts Manual
December 2021 Secton 18 - Mechancal Components
Main Boom Assembly
THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND
EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER
WORKPLACE����� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE
DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT
THE APPROPRIATE SKILLS AND EQUIPMENT�����
Disassembly
ART_4958
End
Section
Base
Section
Main Boom Sections
Park the machine on a firm level surface.
Throughout this procedure, thoroughly clean all hydraulic
connections and tag all hoses for proper reassembly
before disconnecting them. Immediately plug and cap
all openings to prevent contamination. Tag electrical
connections before disconnecting them.
Remove the Platform/Jib Assembly and Platform Level
Cylinder on page 72.
Remove the Boom Extend Cylinder on page 74.
Remove the Main Boom Assembly as described in steps
1 through 12 of the Boom Lift Cylinder/Boom Linkage
disassembly procedure on page 76. Set the Main Boom
Assembly on stands for further disassembly.
Remove the cable track and associated machine parts
from the boom. Lay all cable and hoses out of the way to
avoid damage.
Slide the End Section of the boom out approximately
6 feet (2 m). Position an overhead hoist over the End
Section and attach a sling. 1.
2.
3.
4.
5.
6.
7.
ART_4959
Remove the side and the top inner wear pads and shims
from the front of the boom’s Base Section.
Apply slight lifting pressure.
Remove the bottom inner wear pad from the front of the
boom’s Base Section.
Extract the End Section from the front of the boom by
carefully pulling and lifting with the hoist or forklift. Once
the End Section has been extracted approximately 90%,
use a second hoist or fork lift to support the end of the
End Section that remains inside the boom.
Carefully extract the boom End Section completely.
Remove the wear pads from the End Section 8.
9.
10.
11.
12.
13.
ART_4960
Wear
Pads