Product Manual

Operator's Manual Fifth Edition • Third Printing
Inspections
28 GR-12 • GR-15 • GR-20 Part No. 133571
Test the Pothole Guards
Note: The pothole guards should automatically
deploy when the platform is raised. The pothole
guards activate limit switches that allow the
machine to continue to function. If the pothole
guards do not deploy, an alarm sounds and the
machine will not drive or steer.
69 Raise the platform.
Result: When the platform is raised 4 ft / 1.2 m
from the ground, the pothole guards should
deploy.
70 Press on the pothole guards on one side, and
then the other.
Result: The pothole guards should not move.
71 Lower the platform
Result: The pothole guards should return to
the stowed position.
72 Place a 2x4 or similar piece of wood under a
pothole guard.
73 Raise the platform.
Result: Before the platform is raised 7 ft /
2.1 m from the ground, an alarm should sound.
The platform controls LED readout should
display PHS and the ground controls LCD
should display PHS: Pothole Guard Stuck.
74 Press the drive function button (if
equipped).
75
76 Press and hold the function enable switch on
the control handle.
77 Slowly move the control handle in the direction
indicated by the blue arrow, then in the
direction indicated by the yellow arrow.
Result: The machine should not move forward
or backward.
78 Press the drive function button (if
equipped).
79 Press and hold the function enable switch on
the control handle.
80 Press the thumb rocker switch on top of the
control handle in the direction indicated by the
blue and yellow triangles on the control panel.
Result: The steer wheels should not turn left or
right.
81 Lower the platform.
82 Remove the 2x4 or similar piece of wood.