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Chapter 8 – Operation
lb (2225 N), the system will enter into error mode, stopping
all functions from the upper and lower controls. The horn
will then sound constantly and the overload light will stay
illuminated at the upper and lower controls.
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
lowering and stowing only. The length of time the
pump can be operated depends on the capacity of the
battery. 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 ma-
chine 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.
Snorkel Guard
The Snorkel Guard is a mechanically activated guarding
system which offers an additional level of protection to
the operator at the upper controls.
If an operator is involuntarily pushed against the
spring-loaded Snorkel Guard rail that is mounted above the
upper control panel, the machine functions are disabled.
When the Snorkel Guard is activated:
• the horn sounds.
• the blue light under the upper control panel flashes.
• only main boom down and jib down functions will
operate.
52
The lower controls are not affected by the Snorkel Guard
activation.
Override Switch
The override switch at the upper controls may be used
to override the Snorkel Guard, platform overload system,
bumpguard system, or boom/drive cut-out, when either
is activated.
When the platform overload system is activated, the
override or the emergency power switch (refer to Figure
8.2) at the upper controls may be used to override the
system to operate main boom up/down/retract, jib boom
up/down, or turntable rotation and drive functions. The
switch is spring returned to the normal operation position.
When the Snorkel Guard system is activated, the override
switch (refer to Figure 8.2) at the upper controls may be
used to override the system to operate main boom up/down/
retract, jib boom up/down and turntable rotation functions.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury could result from such accidents. The override
switch must only be used when all controls are re-
leased and in the neutral position. If a zero or neutral
state cannot be achieved, depress the emergency
stop and obtain assistance at the lower controls.
1. When the machine is stopped due to activation of
the Snorkel Guard system or overload, immediately
depress the emergency stop, release the foot switch
and all controls. Perform an assessment of the situ-
ation which caused the system to activate.
2. If it is determined that all controls are released and
operation can proceed, return the emergency stop
to the on position, and activate the override switch.
3. Activate the foot switch.
4. Activate the necessary functions to move the platform
away from the obstacle that caused the Snorkel
Guard activation or if due to an overload fault, retract
the booms then lower in a safe condition.
5. Assess the machine for any damage. If damage
occurred, return to the stowed position, exit the unit
and perform a thorough inspection before returning
to service.
Gradeability
Machine gradeability refers to the maximum slope that
the aerial platform is capable of travel under practical
conditions. It is based on mathematical calculation, but
it also takes into account the practical application.
At any given moment when driving the machine on a
slope, at least one, if not all, of the factors contributing
to achieving theoretical gradeabilty will not be at optimal
460SJ – 1433685
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