Part No. 1268494
S-100 • S-105 • S-120 • S-125
3 - 35
March 2017
Section 3 • Repair Procedures
16 Tag and disconnect the wiring connector from
the cable break limit switch.
17 Tag, disconnect and plug the hydraulic hoses
from the primary boom extension cylinder. Cap
the fittings on the cylinder.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
18 Attach a second overhead
10 ton / 10,000 kg
crane to the pivot end of the boom for support.
Do not apply any lifting pressure.
19 Remove the pin retaining fastener from the
boom pivot pin. Do not remove the pin.
20 Use a soft metal drift to remove the boom pivot
pin.
Component damage hazard. Be
careful not to damage the boom
envelope limit switch(s) located
on the inside of the engine side
turntable riser when removing
the boom assembly. The boom
envelope switch(s) can be
damaged even if the damage is
not visible.
21 Carefully remove the boom assembly from the
machine and place it on a structure capable of
supporting it.
Crushing hazard. The boom may
become unbalanced and fall when
it is removed from the machine if
it is not properly supported by the
overhead cranes.
BOOM COMPONENTS
How to Disassemble the Boom,
S-120 and S-125 Models
Note: Complete disassembly of the boom is only
necessary if the outer or inner boom tubes must
be replaced. The primary boom extension cylinder
can be removed without completely disassembling
the boom. See 4-4,
How to Remove the Primary
Extension Cylinder
.
1 Remove the boom. See 4-2,
How to Remove the Boom
.
2 Remove the retaining fasteners from the access
covers on both sides of the boom at the pivot
end. Remove the access covers.
a
side access covers
3 Secure the number 2 and number 3 boom
tubes together with a strap or chain to prevent
them from moving.
4 Remove the cable clamp from the cable break
limit switch wiring.
a
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