Test The Turntable Rotation Stop; Check The Electrical Contactors - Genie Z-30/20N Service Manual

April 2016
B-12

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.
Part No. 139378
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
Checklist B Procedures
B-13

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 electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
Note: Replace the contactors if any damage is
found.
Service Manual
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