Genie Z-30/20N, Service Manual

Page: 36 / 161

3 - 18 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N Part No. 139378
Section 3 • Scheduled Maintenance Procedures June 2011
REV B CHECKLIST B PROCEDURES
B-13
Test the Turntable Rotation Stop
Note: Genie specifications require that this
procedure be performed every 250 hours or
quarterly, whichever comes first.
The turntable is capable of rotating the boom 359
degrees and is stopped midpoint between the steer
wheels by the rotation stop. Detecting a rotation
stop malfunction is essential to safe operation and
good machine performance. If the turntable rotates
past the rotation stop, component damage may
result.
1 Turn the key switch to platform controls and pull
out the red Emergency Stop buttons to the on
position at both ground and platform controls.
2 Rotate the turntable to the left as far as it
will go.
Result: Movement should stop when the
primary boom reaches midpoint between the
steer tires.
3 Rotate the turntable to the right as far as it
will go.
Result: Movement should stop when the
primary boom reaches midpoint between the
steer tires.
B-14
Check the Electrical Contactors
Note: Genie specifications require that this
procedure be performed every 250 hours or
quarterly, whichever comes first.
Maintaining the electrical contactors in good
condition is essential to safe machine operation.
Failure to locate a worn or damaged contactor
could result in an unsafe working condition and
component damage.
1 Remove the drive chassis cover from the non-
steer end of the machine and locate the
electrical contactors mounted on the electrical
component mounting panel.
2 Visually inspect the contact points of each
contactor for the following items:
• Excessive burns
• Excessive arcs
• Excessive pitting
Electrocution/burn hazard. Contact
with hot or live circuits could result
in death or serious injury. Remove
all rings, watches and other
jewelry.
Note: Replace the contactors if any damage is
found.