Terex Genie Z-45/25 Bi-Energy, Руководство по обслуживанию и ремонту

Страница: 51 / 143

July 2021 Service and Repair Manual
Primary Boom Components
Part No. 1312350GT Z ® -45/25 • Z ® -45/25J 39
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.
Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications,
Hydraulic Hose and Fitting Torque
Specifications.
1 Raise the primary boom to a horizontal
position.
2 Raise the secondary boom until the primary
boom lift cylinder barrel-end pivot pin is above
the turntable covers.
3 Attach a 5 ton / 5000 kg capacity suitable
lifting device to the primary boom for support.
4 Raise the primary boom with a suitable lifting
device 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 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 pin retaining fasteners from the
primary boom lift cylinder rod-end pivot pin.
Use a soft metal drift to remove the pin.
Crushing hazard. The primary
boom will fall if not properly
supported when the primary
boom rod-end pivot pin is
removed.
8 Place a support block across both turntable
covers under the primary boom lift cylinder.