Secondary Boom Lift Cylinder - Genie TZ-50 Servise Manual

November 2004
REV A
43 Remove the pin retaining fasteners securing the
secondary link pivot pin to the turntable.
44 Using a soft metal drift, remove the secondary
link pivot pin.
Crushing hazard. The secondary
link could become unbalanced and
fall if not properly supported when
the pin is removed.
45 Release the latch at the tongue end of the
machine.
46 Remove the secondary link from the machine.
Crushing hazard. The secondary
link could become unbalanced and
fall if not properly supported when
removed from the machine.
47 Tag, disconnect and plug the hoses from the
secondary lift cylinder. Cap the fittings on the
cylinder.
48 Attach a lifting strap of suitable capacity from an
overhead crane to the secondary lift cylinder.
Raise the cylinder to a horizontal position.
49 Remove the pin retaining fasteners securing the
secondary lift cylinder pivot pin to the mid-pivot.
50 Using a soft metal drift, remove the secondary
lift cylinder pivot pin. Remove the cylinder from
the machine.
Crushing hazard. The cylinder
could fall if not properly supported
when the pivot pin is removed.
Part No. 84577
4-2

Secondary Boom Lift Cylinder

The secondary boom lift cylinder raises and lowers
the secondary boom. The secondary boom lift
cylinder is equipped with a counterbalance valve to
prevent movement in the event of a hydraulic line
failure.
1 Release the boom latch at both the tongue end
and turntable end of the boom.
2 Raise the secondary boom to a horizontal
position.
3 Attach a lifting strap of suitable capacity from an
overhead crane to the mid-pivot. Support the
mid-pivot. Do not apply any lifting pressure.
4 Attach a lifting strap of suitable capacity from an
overhead crane to the lift cylinder. Support the
cylinder. Do not apply any lifting pressure.
5 Remove the pin retaining fasteners securing the
lift cylinder rod end pivot pin.
6 Place a wooden block between the secondary
link and the lift cylinder.
7 Using a soft metal drift, remove the lift cylinder
pivot pin.
8 Lower the cylinder onto the wooden block.
9 Rotate the rod end of the secondary boom lift
cylinder approximately 90°.
10 Raise the cylinder slightly, remove the block and
lower the cylinder through the secondary link
and onto the front bulkhead.
Genie TZ-50/30
Section 4 • Repair Procedures
SECONDARY BOOM COMPONENTS
Crushing hazard. The cylinder
could fall if not properly supported
when the pivot pin is removed.
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