Terex Genie S-80, Service And Repair Manual

Page: 52 / 301

Service and Repair Manual March 2018
Boom Components
38 S®- 80 • S® -85 • S® -80X Part No. 1269074GT
20 Support the platform leveling master cylinder.
Remove the master cylinder rod-end pivot pin
retaining fasteners. Place a rod through the
pin and twist to remove. Carefully lower the
master cylinder down.
21 Tag, disconnect and plug the hydraulic hoses
from the bulkhead fittings at the pivot end of
the boom. Cap the bulkhead fittings.
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.
22 Remove the external snap rings from both
boom pivot pins at the short and long link
arms. Do not remove the pins.
23 Using the overhead crane, adjust the boom as
necessary to relieve pressure from the pivot
pins.
24 Use a soft metal drift to remove each boom
pivot pin. Carefully remove the boom
assembly from the machine and place it on a
structure capable of supporting it.
Crushing hazard. The boom
could fall if not properly
supported by the overhead crane
when each boom pivot pin is
removed.
Crushing hazard. The long and
short link arms may fall if not
properly supported when the
boom pivot pins are removed.
4-3
Boom Lift Cylinder
The boom lift cylinder raises and lowers the boom.
The boom lift cylinder is equipped with
counterbalance valves to prevent movement in the
event of a hydraulic line failure.
How to Remove the 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 boom to a horizontal position.
2 Attach a 5 ton / 5000 kg overhead crane to the
boom at the platform end for support. Do not
lift the boom.