Test The Ground Control Override; Test The Platform Self-Leveling - Genie Z-30/20N Service Manual

April 2016
B-6

Test the Ground Control Override

Genie specifications require that this procedure be
performed every 250 hours or quarterly, whichever
comes first.
A properly functioning ground control override is
essential to safe machine operation. The ground
control override function is intended to allow
ground personnel to operate the machine from the
ground controls whether or not the Emergency
Stop button on the platform controls is in the on or
off position. This function is particularly useful if the
operator at the platform controls cannot return the
boom to the stowed position.
1 Push in the red Emergency Stop button at the
platform controls to the off position.
2 Turn the key switch to ground controls and pull
out the red Emergency Stop button to the on
position.
3 Operate each boom function through a partial
cycle at the ground controls.
Result: All boom functions should operate.
Part No. 139378
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
Checklist B Procedures
B-7

Test the Platform Self-leveling

Note: Genie specifications require that this
procedure be performed every 250 hours or
quarterly, whichever comes first.
Automatic platform self-leveling throughout the full
cycle of boom raising and lowering is essential for
safe machine operation. The platform is maintained
level by the platform leveling slave cylinder which is
controlled by the platform leveling master cylinder
located at the base of the primary boom. A platform
self-leveling failure creates an unsafe working
condition for platform and ground personnel.
1 Turn the key switch to ground controls and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
2 Lower the boom to the stowed position.
3 Adjust the platform to a level position using the
platform leveling toggle switch.
4 Raise and lower the primary boom through a
full cycle.
Result: The platform should remain level at all
times to within ±5 degrees.
Service Manual
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