REV C
Section 3 • Scheduled Maintenance Procedures
March 2007
Part No. 97385
GS-30 • GS-32 • GS-46
3 - 29
C-1
Test the
Platform Overload System
(if equipped)
Genie specifications require that this procedure be
performed every 500 hours or six months,
whichever comes first OR when the machine fails
to lift the maximum rated load.
Testing the platform overload system regularly is
essential to safe machine operation. Continued
use of an improperly operating platform overload
system could result in the system not sensing an
overloaded platform condition. Machine stability
could be compromised resulting in the machine
tipping over.
The platform overload system is designed to
prevent machine operation in the event the
platform is overloaded. Models equipped with the
platform overload option are provided with two
additional machine control components: the
overload pressure switch and a maximum height
limit switch.
The overload pressure switch, which is adjustable
and located at the barrel-end of the lift cylinder, is
used to determine when the hydraulic lift cylinder
requires too much pressure to support the load
inside the platform. When this occurs, the pressure
switch will send a signal to the ECM, which will not
allow the machine to function until the extra weight
is removed from the platform.
a
overload pressure switch
b
maximum height limit switch
b
a
Checklist C Procedures
The maximum height limit switch, located in the
middle of the drive chassis under the scissor arms,
is used to disable the lift valve coil when the
platform is near maximum height. When activated,
the limit switch keeps the lift cylinder from going
over lift relief which would cause the pressure
switch to falsely indicate an overload condition.
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