Primary Boom Lift Cylinder - Genie TMZ-50/30 Service Manual

June 2005
800-610-4101
ActionRental.com
REV B
4-4

Primary Boom Lift Cylinder

How to Remove the
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.
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 Disconnect the battery pack from the machine.
Electrocution hazard. Contact with
electrically charged circuits could
result in death or serious injury.
Remove all rings, watches and
other jewelry.
2 Tag, disconnect and plug the hydraulic hoses
on the lift 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.
Part No. 65162
PRIMARY BOOM COMPONENTS
3 Attach a lifting strap of suitable capacity from an
overhead crane to the lift cylinder.
4 Remove the pin retaining fasteners from the lift
cylinder rod end pivot pin.
5 Using a soft metal drift, remove the lift cylinder
rod end pivot pin.
Crushing hazard. The cylinder will
fall if not properly supported when
the pivot pin is removed.
6 Lower the cylinder onto the secondary boom.
7 Remove the pin retaining fasteners from the lift
cylinder barrel end pivot pin.
8 Using a soft metal drift, remove the lift cylinder
barrel end pivot pin.
Crushing hazard. The cylinder
could fall if not properly supported
when the pivot pin is removed.
9 Carefully remove the cylinder from the machine.
Crushing hazard. The lift cylinder
could become unbalanced and fall
if not properly supported when
removed from the machine.
TMZ-50/30
Section 4 • Repair Procedures
4 - 19