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The system will remain in error mode until the excess
load is removed from the platform and the emergency
stop button or start switch is cycled off and back on,
resetting the system. At that time, the machine functions
are operational.
Caution
The emergency power system is for emergency low-
ering and stowing only. The length of time the pump
can be operated depends on the capacity of the bat-
teries. Do not use this system for normal operation.
If the platform overload sensing system is tripped while
operating the machine or if the system is in error mode
and can not be reset, the emergency power system may
still be used for emergency machine operation from either
the lower or upper controls.
Danger
The aerial platform can tip over if it becomes unsta-
ble. Death or serious injury will result from a tip-over
accident. Do not exceed the capacity values indicated
on the platform rating placard.
The overload sensing system is not active when the
machine is being driven with the booms in the stowed
position. This allows the machine to be driven without
the system sensing an overload due to rough ground
conditions.
To eliminate repeated tripping of the system during ma-
chine operation, there is a five second delay in machine
functions following:
• starting the engine.
• removing excess load from the platform.
Boom/Drive Cut-out
On machines manufactured after March 2021, boom and
drive functions will be cut-out, disabled, when the main
boom is elevated or extended from the stowed position
and the ground slope exceeds the chassis slope sensor
settings. The override switch may be used to stow the
machine which then allows all functions to be returned
to normal. The emergency power system may be used
at this time as well.
When driving the machine unstowed onto a slope, at 4.5
degrees slope drive is paused, an audible two-tone alarm
will sound, and the tilt warning light will come on. This
warning indicates that the machine may be backed off
the slope or stowed without the use of the override switch
to do so. If the degree of slope continues to increase to
5 degrees, a constant alarm will sound and boom and
drive functions will become disabled requiring the use of
the override control to stow the machine.
460SJ – 1433685
Tilt Alarm/Warning Lights
If the aerial platform chassis is out of level more than the
machine specified slope sensor alarm setting when the
main boom is raised or extended, an alarm will sound
and the tilt warning light on the lower and upper control
panels (refer to Figures 4.1 and 4.2) will illuminate. The
tilt alarm is located under the upper control panel.
Danger
The aerial platform can tip over if it becomes unsta-
ble. Death or serious injury will result from a tip-over
accident. Do not drive or position the aerial platform
for elevated use near any drop-off, hole, slope, soft
or uneven ground, or other tip-over hazard.
Completely lower the booms and then drive to a level
surface when the tilt alarm sounds.
The tilt alarm and warning lights are for added protection
and do not justify operating on anything other than firm,
flat, level surfaces.
Engine Protection Systems
A constant tone alarm will sound to warn against high
engine temperature or low oil pressure.
The engine will shut-down:
• if the operating temperature exceeds a preset level
• or if the oil pressure is too low for safe operation.
High Engine Temperature Alarm
If the coolant exceeds the engine operating temperature
an alarm will sound and the engine will shut off.
Do not restart the engine until the condition that caused
the overheating has been corrected.
Low Oil Pressure Alarm
The low oil pressure alarm sounds when the engine oil
pressure is near the lower limit for safe engine operation.
If the alarm sounds, lower the platform to the ground and
then turn the engine off.
• If the engine oil pressure falls below a safe operating
value the engine will shut off.
• The engine can be restarted with low oil pressure,
but it will only run for a few seconds before it shuts
off again.
• Do not restart the engine until the condition that
caused the low oil pressure has been corrected.
Horn
The horn may be used to warn personnel on the ground.
The horn switch is to the left of the emergency stop button
on the upper control panel (refer to Figure 4.6). The horn
is operational when the machine is set up for operation
from the upper controls.
Chapter 4 – Safety Devices
19
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