E Checklist C Procedure; Test The Platform Overload System (If Equipped) - Genie GS-3390 Service Manual

July 2007
REV E
C-1
Test the Platform Overload
System (if equipped)
Genie specifications require that this procedure be
performed every 500 hours or semi-annually,
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.
Note: Perform this procedure with the machine on
a firm, level surface that is free of obstructions.
1 Disconnect the platform controls from the
machine at the platform.
2 Open the ground control panel and locate the
Electronic Control Module (ECM).
3 Tag and disconnect the platform controls wire
harness from the ECM wire harness.
4 Securely connect the platform controls to the
ECM wire harness.
5 Locate the terminal strip behind the ground
control panel.
Part No. 72863
Section 3 • Scheduled Maintenance Procedures
Checklist C Procedures
6 Tag and disconnect the black wire of the
maximum height limit switch wire harness from
the A10 terminal of the terminal strip.
7 Tag and disconnect the white wire of the
maximum height limit switch wire harness from
the B9 terminal of the terminal strip.
8 Securely connect a jumper wire from terminal
A10 of the terminal strip to terminal B9 of the
terminal strip.
9 Turn the key switch to platform control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls.
10 Fully raise the platform. Release the joystick.
Result: The engine should stop and an alarm
should sound and fault code 99
OVERLOAD
diagnostic display window at the ground
controls.
Result: The engine does not stop OR an alarm
doesn't sound OR fault code 99 is not present
in the ECM diagnostic display window at the
ground controls. Refer to Repair Procedure
12-1, Calibrate the Platform Overload System
(if equipped).
11 Activate the auxiliary lowering function and
lower the platform approximately 4.5 m.
12 Turn the key switch to the off position.
13 Disconnect the jumper wire from terminal A10
of the terminal strip to terminal B9 of the
terminal strip.
GS-3390 • GS-4390 • GS-5390
PLATFORM
should be present in the ECM
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