Boom Lift Cylinder - Genie GTH-5519 Service And Repair Manual

Section 3 • Repair Procedures
BOOM COMPONENTS
1-2

Boom Lift Cylinder

How to Remove the Lift
Cylinder
Note: When removing a hose assembly or fitting,
the O-ring on the fitting and/or hose end must be
replaced and then torqued to specification during
installation. Refer to Section 2, Hydraulic Hose
and Fitting Torque Specifications.
1 1 Lift the boom until the pin locking the lift Lift the boom until the pin locking the lift
cylinder - rod side - is in a position above the cylinder - rod side - is in a position above the
cab roof. . cab roof. .
2 2 Attach a lifting strap from an overhead 22045 Attach a lifting strap from an overhead 22045
lbs / 10,000 kg crane to the fork end of the lbs / 10,000 kg crane to the fork end of the
boom. Support the boom. Do not apply any boom. Support the boom. Do not apply any
lifting pressure. lifting pressure.
3 3 Tag, disconnect and plug the hydraulic hoses Tag, disconnect and plug the hydraulic hoses
connected to the shut-off valve. Cap the fittings. connected to the shut-off valve. Cap the fittings.
Bodily injury hazard. Spraying
WARNING
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.
Component damage hazard.
NOTICE
Hoses can be damaged if they
are kinked or pinched.
4 4 Attach a lifting strap from an overhead crane Attach a lifting strap from an overhead crane
to the rod end of the lift cylinder. Support the to the rod end of the lift cylinder. Support the
cylinder. Do not apply any lifting pressure. cylinder. Do not apply any lifting pressure.
3-6
5 5 Place a suitably dimensioned wooden block Place a suitably dimensioned wooden block
before the hydraulic oil tank. This block will be before the hydraulic oil tank. This block will be
used to support the weight of the lift cylinder used to support the weight of the lift cylinder
first, and the boom afterwards. first, and the boom afterwards.
6 Remove the fasteners securing the lift cylinder
rod-end pivot pin to the boom.
DANGER
7 7 Lower the lift cylinder and place it on the Lower the lift cylinder and place it on the
wooden block previously positioned. wooden block previously positioned.
8 Remove the fasteners securing the lift cylinder
barrel-end pivot pin to the chassis.
9 Use a soft metal drift to remove the pivot pin.
10 Remove the cylinder from the machine.
DANGER
11 Using the overhead crane, raise and place the
boom on the wooden block suitably positioned.
GTH-5519
September 2016
Crushing hazard. The boom
will fall if not properly supported
when the pivot pin is removed
from the machine.
Crushing hazard. The cylinder
could fall if not properly
supported when removed from
the machine.
Part No. 1272852