Inspect The Mast Assembly For Wear - Genie GR-12 Service Manual

November 2005
REV B
Confirm the setting:
10 Turn the key switch to platform control.
11 Lift the test weight off the platform floor using a
suitable lifting device.
12 Place the test weight back onto the platform
floor using a suitable lifting device.
Result: The diagnostic display at the ground
controls will show two flat bars and a blinking
light, indicating a normal condition, and the
diagnostic display at the platform controls will
show the battery condition. Refer to Repair
procedure 1-3, How to Determine the Battery
Voltage.
13 Add an additional weight to the platform not to
exceed 20% of the maximum rated load. Refer
to the machine serial plate.
Result: The diagnostic display will show 'OL' at
both the ground and platform controls. The
platform overload system is operating properly.
Result: The diagnostic display at the ground
controls will show two flat bars and a blinking
light and the diagnostic display at the platform
controls will show the battery condition. The
platform overload system is not operating
properly. Repeat this procedure beginning with
step 1.
14 Test all machine functions from the platform
controls.
Result: All platform control functions should not
operate.
15 Turn the key switch to ground control.
16 Test all machine functions from the ground
controls.
Result: All ground control functions should not
operate.
Part No. 84700
Section 3 • Scheduled Maintenance Procedures
D-2
Inspect the Mast Assembly
for Wear
Detection of excessive or unusual wear in the mast
assembly is essential for safe machine operation.
An unsafe working condition exists if the mast
assembly has excessive wear and/or does not
operate smoothly, free of hesitation and binding.
1 Remove the mast covers.
a
b
2 Raise the platform until approximately
4 inches / 10 cm of each column is visible.
GR-12 • GR-15 • GR-20
CHECKLIST D PROCEDURES
GR-15 shown
a mast cover
b idler wheel
c spacer
c
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