Test The Ground Control Override; Test The Platform Self-Leveling - Genie Z-34/22 Service Manual

April 2016
B-9

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 platform red Emergency Stop
button to the off position.
2 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position.
3 At the ground controls, operate each boom
function through a partial cycle.
Result: All boom functions should operate.
Part No. 139234
Checklist B Procedures
B-10

Test the Platform Self-leveling

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
at level by the platform leveling slave cylinder
which operates in a closed loop hydraulic circuit
with the master cylinder located at the base of the
boom. A platform self-leveling failure creates an
unsafe working condition for platform and ground
personnel.
1 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position.
2 Lower the boom to the stowed position.
3 Activate function enable and adjust the
platform to a level position.
4 Raise and lower the primary boom through a
full cycle.
Result: The platform should remain level at all
times to within ±5 degrees.
Z-34/22 Bi-Energy
Service Manual
33