Service Manual Supplement

First Edition
Second Printing
Part No. 82682

Platform Overload
Maintenance
Maintenance Procedures August 2003

Information
This Service Manual Supplement provides
maintenance procedures for the Platform
Overload System which are not included in your
Service Manual. Please add these maintenance
procedures to your Service Manual and to the
Maintenance Inspection Report for your machine.

This symbol in the text means the result applies to

the following machines:

Z-30/20N Z-45/25 Bi-energy

Z-34/22 IC Z-45/25J Bi-energy
Z-34/22 DC S-40
Z-34/22 Bi-energy S-45
Z-45/25 IC S-60
Z-45/25J IC S-65
Z-45/25 DC S-80
Z-45/25J DC S-85
Z-60/34

This symbol in the text means the result applies to

the following machines:

Z-80/60 S-100
S-105 S-120
S-125

2 Service Manual Supplement Part No. 82682

August 2003 Maintenance Procedures

Maintenance Procedures
Grease the Platform Overload Test the Platform Overload
Mechanism System

Genie specifications require Genie specifications require that

that this procedure be performed this procedure be performed every
every 500 hours or 6 months, 500 hours or six months.
whichever comes first. Perform
Testing the platform overload system regularly is
this procedure more often if dusty
essential to safe machine operation. Continued
conditions exist.
use of an improperly operating platform overload
Application of lubrication to the platform overload system could result in the system not sensing an
mechanism is essential to safe machine operation. overloaded platform condition. Machine stablity
Continued use of an improperly greased platform could be compromised resulting in the machine
overload mechanism could result in the system not tipping over.
sensing an overloaded platform condition and will
result in component damage. Perform this procedure with the
machine on a firm, level surface.
1 Locate the grease fittings on each pivot pin of
1 Turn the key switch to platform control. Start the
the platform overload assembly.
engine from the platform controls.
2 Thoroughly pump grease into each grease
2 Level the platform.
fitting using a mulit-purpose grease.
3 Determine the maximum platform capacity.
If your machine is not equipped
Refer to the machine serial plate.
with grease fittings on the pivot
pins, remove the pivot pins and
grease them.

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Maintenance Procedures August 2003

MAINTENANCE PROCEDURES

4 Using a suitable lifting device, place an 6 Add an additional test weight to the original test
appropriate test weight equal to that of the weight to overload the platform based on your
maximum platform capacity in one of the maximum platform capacity:
locations shown.
Maximum capacity Add additional weight

500 lbs / 227 kg +75 lbs / 34 kg

600 lbs / 272 kg +90 lbs / 41 kg
750 lbs / 340 kg +113 lbs / 51 kg

Result:
The alarm should be sounding.
The platform overload indicator light should
be flashing at both the ground and platform
controls.
Result: The platform overload indicator light
should be off at both the ground and platform
controls. The alarm should be sounding.
The platform overload indicator light should
5 Carefully move the test weight to each be flashing at the platform controls and
remaining location. “PLATFORM OVERLOAD” should be
Result: The platform overload indicator light displayed on the LCD screen at the ground
should be off at both the ground and platform controls.
controls. If the alarm does not sound and
the platform overload indicator
light does not come on with the
test weights in any of the platform
locations, the platform overload
system needs to be calibrated.
See, How to Calibrate the Platform
Overload System.
There may be an approximate 2
second delay before the overload
indicator light turns on and the
alarm sounds.

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August 2003 Maintenance Procedures

MAINTENANCE PROCEDURES

7 Carefully move the test weights to each 10 Test all machine functions from the ground
remaining location in the platform. controls.
Result: Result: All ground control functions should not
operate.
The alarm should be sounding.
The platform overload indicator light should Machine functions should still
be flashing at both the ground and platform operate with auxiliary power at the
controls. ground controls.
11 Lift the test weights off the platform floor using a
The alarm should be sounding. suitable lifting device.
The platform overload indicator light should
Result: The platform overload indicator light and
be flashing at the platform controls and
alarm should turn off at both the ground and
“PLATFORM OVERLOAD” should be
platform controls.
displayed on the LCD screen at the ground
controls. There may be an approximate 2
second delay before the overload
If the alarm does not sound and
indicator light and alarm turn off.
the platform overload indicator
light does not come on with the 12 Test all machine functions from the ground
test weights in any of the platform controls.
locations, the platform overload
system needs to be calibrated. Result: All ground control functions should
See, How to Calibrate the Platform operate normally.
Overload System. 13 Turn the key switch to platform control.
There may be an approximate 2 14 Test all machine functions from the platform
second delay before the overload controls.
indicator light turns on and the
alarm sounds. Result: All platform control functions should
operate.
8 Test all machine functions from the platform
controls. If the platform overload system is
not operating properly, see How to
Result: All platform control functions should not Calibrate the Platform Overload
operate. System.
9 Turn the key switch to ground control.

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Maintenance Procedures August 2003

MAINTENANCE PROCEDURES

How to Calibrate the Platform Determine the limit switch trigger point:
Overload System 4 Gently move the platform up and down by hand,
so it bounces approximately 2.5 to 5 cm. Allow
the platform to settle.
Result: The overload indicator light and the
Genie specifications require that alarm is on. Slowly tighten the load spring
this procedure be performed every adjustment nut by turning it clockwise just until
1000 hours of operation or yearly. the overload indicator light and alarm turns off.
Yearly calibration of the platform overload system The platform will need to be
is essential to safe machine operation. Continued moved up and down and allowed
use of an improperly calibrated platform overload to settle in between adjustments.
system could result in the system failing to sense
There may be an approximate 2
an overloaded platform. The stability of the
second delay before the overload
machine is compromised and it could tip over.
indicator light turns on and the
Perform this procedure with the alarm sounds.
machine on a firm, level surface. Result: The overload indicator light and
1 Level the platform. alarm is off. Slowly loosen the load spring
adjustment nut by turning it counterclockwise
2 Determine the maximum platform capacity. just until the overload indicator light and alarm
Refer to the machine serial plate. turn on.
3 Using a suitable lifting device, place an There may be an approximate 2
appropriate test weight equal to that of the second delay before the overload
maximum platform capacity at the center of the indicator light turns on and the
platform floor. alarm sounds.
The platform will need to be
moved up and down and allowed
to settle in between adjustments.

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August 2003 Maintenance Procedures

MAINTENANCE PROCEDURES

Confirm the setting: 8 Add an additional test weight to the original test
weight to overload the platform based on your
5 Turn the key switch to platform control. Start the maximum platform capacity:
engine from the platform controls.
6 Lift the test weight off the platform floor using a Maximum capacity Add additional weight
suitable lifting device. 500 lbs / 227 kg +10 lbs / 4.5 kg
7 Place the test weight back onto the center of 600 lbs / 272 kg +12 lbs / 5.4 kg
750 lbs / 340 kg +15 lbs / 6.8 kg
the platform floor using a suitable lifting device.
Result:
Result:
The alarm should be off. The platform
overload indicator light should be off at both The alarm should be sounding.
the ground and platform controls. The platform overload indicator light should
be flashing at both the ground and platform
controls.
The alarm should be off. The platform
overload indicator light should be off at the
platform controls and there should be no The alarm should be sounding.
error message on the LCD display at the The platform overload indicator light should
ground controls. be flashing at the platform controls and
“PLATFORM OVERLOAD” should be
There may be an approximate 2 displayed on the LCD screen at the ground
second delay before the overload controls.
indicator light and alarm turn off.
There may be an approximate 2
second delay before the overload
indicator light turns on and the
alarm sounds.
9 Test all machine functions from the platform
controls.
Result: All platform control functions should not
operate.
10 Turn the key switch to ground control.
11 Test all machine functions from the ground
controls.
Result: All ground control functions should not
operate.
Machine functions should still
operate with auxiliary power at the
ground controls.

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Maintenance Procedures August 2003

MAINTENANCE PROCEDURES

12 Lift the test weight off the platform floor using a

suitable lifting device.
Result:
The alarm should be off. The platform
overload indicator light should be off at both
the ground and platform controls.

The alarm should be off. The platform

overload indicator light should be off at the
platform controls and there should be no
error message on the LCD display at the
ground controls.
There may be an approximate 2
second delay before the overload
indicator light and alarm turn off.
13 Test all machine functions from the ground
controls.
Result: All ground control functions should
operate normally.
14 Turn the key switch to platform control.
15 Test all machine functions from the platform
controls.
Result: All platform control functions should
operate normally.
If the platform overload system is
not operating properly, repeat
steps 1 through 4.

8 Service Manual Supplement Part No. 82682