Terex Genie Z-135/70, Service And Repair Manual

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October 2018 Service and Repair Manual
Jib Boom Components
Part No. 1268557GT Z®-135 /70 51
6 Place blocks between the upper and lower
cable tracks and secure the upper and lower
tracks together.
Crushing hazard. If the upper
and lower cable tracks are not
properly secured together, the
cable track could become
unbalanced and fall when
removed from the machine.
7 Attach a lifting strap from an overhead crane to
the cable track.
8 Remove the mounting fasteners that attach the
lower cable track to the jib boom.
9 Remove the cable track from the machine and
lay to the side.
Crushing hazard. The cable
track could become
unbalanced and fall if not
properly attached to the
overhead crane.
Component damage hazard.
Cables and hoses can be
damaged if they are kinked or
pinched.
10 Disconnect the electrical connector from the jib
boom angle sensor located at the jib boom
pivot pin on the engine side of the machine.
11 Remove the cover retaining fasteners from the
jib boom angle sensor. Remove the cover.
12 Remove the jib boom angle sensor mounting
bracket fasteners from the side of the primary
extension boom.
13 Carefully remove the bracket and sensor
assembly. Note the location of the springs. Do
not lose the springs.
Note: There is one spring inside the jib boom pivot
pin and one inside the angle sensor.
Note: When the jib boom is installed, the jib boom
angle sensor will need to be calibrated. Refer to
repair procedure,
Jib Boom Bellcrank Angle Sensor
for the calibration procedure.
14 Attach a lifting strap from an overhead crane to
the platform end of the jib boom.
15 Support the barrel end of the jib boom lift
cylinder with another suitable lifting device.
16 Remove the pin retaining fasteners from the jib
boom lift cylinder barrel-end pivot pin.
17 Use a soft metal drift to remove the jib boom lift
cylinder barrel-end pivot pin.
Crushing hazard. The jib boom
could fall when the barrel-end
pivot pin is removed if not
properly supported by the
overhead crane.
Crushing hazard. The jib boom
lift cylinder may become
unbalanced and fall when it is
removed from the machine if it is
not properly supported by the
overhead crane.
18 Secure the jib boom lift cylinder to the jib boom
with a strap or other suitable device.
19 Raise the jib boom to a horizontal position
using the overhead crane.
20 Attach a second lifting strap from the overhead
crane to the pivot end of the jib boom.
21 Remove the pin retaining fastener from the jib
boom pivot pin. Do not remove the pin.
22 Place a block under the jib boom level cylinder
for support. Protect the cylinder rod from
damage.