Service and Repair Manual
July 2019
Primary Boom Components
48
S-
40 XC • S
-
45 XC • S
-
40 TraX •
S-45 TraX
Part No. 1286829GT
4-3
Primary Boom Lift Cylinder
The primary boom lift cylinder raises and lowers
the primary boom. The primary boom lift cylinder is
equipped with a counterbalance valve to prevent
movement in the event of a hydraulic line failure.
How to Remove the Primary
Boom Lift Cylinder
Bodily injury hazard. This
procedure requires specific repair
skills, lifting equipment and a
suitable workshop. Attempting
this procedure without these skills
and tools could result in death or
serious injury and significant
component damage. Dealer
service is strongly recommended.
1 Raise the primary boom to a horizontal
position.
2 Place support blocks across the turntable
under the boom lift cylinder
3 Attach a 5 ton / 5000 kg overhead crane to the
primary boom for support.
4 Raise the primary boom with the overhead
crane slightly to take the pressure off the
primary boom lift cylinder pivot pins.
5 Support the rod end and the barrel end of the
primary boom lift cylinder with a second
overhead crane or similar lifting device.
6 Tag, disconnect and plug the primary boom lift
cylinder hydraulic hoses. 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.
7 Remove the retaining fasteners from the
primary boom lift cylinder rod-end pivot pin.
Use a soft metal drift to remove the pin. Lower
the lift cylinder onto the blocks. Protect the
cylinder rod from damage.
Crushing hazard. The primary
boom will fall if not properly
supported when the primary
boom rod-end pivot pin is
removed.
8 Remove the four mounting fasteners from the
lift cylinder barrel-end pivot pin mounting
plate.
Crushing hazard. The primary
boom lift cylinder could become
unbalanced and fall if not
properly supported by the lifting
device.
9 With the lift cylinder being supported by the
overhead crane, carefully pull the lift cylinder
toward the platform to remove it from the
machine.
Crushing hazard. The lift cylinder
could become unbalanced and
fall if not properly supported and
secured to the lifting device.
Содержание S-40 TRAX
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