Snorkel TB66J CE - Manual (Page 21)

Chapter 4 – Safety Devices
TB60/66J – 0084030EE 7
Platform Overload Sensing System
All functions are stopped from the upper and lower
controls, when the platform overload limit is exceeded.
The horn will sound intermittently and the red overload
light (refer to Figure 4.7) will blink until the excess load
is removed from the platform. At that time, the machine
functions are again operational.
Figure 4.7 – Upper Controls
If the platform becomes significantly overloaded, or if
an upward force on the platform exceeds approximately
445 N (00 lbs), 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
(refer to Figures 4.7 and 4.8).
Figure 4.8 – Lower Control Panel
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.
A 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.
A Danger
The aerial platform can tip over if it becomes un-
stable. 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.
• placing the drive/boom selector switch in the boom
position when the main boom is below horizontal
and fully retracted.
• removing excess load from the platform.
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. An engine temperature gauge is on
the lower control panel (refer to Figure 4.8).
High Engine Temperature Alarm
If the oil exceeds 0°C (230°F) an alarm will sound and
the engine will shut off. Any time there is no alternator
current being produced, an alarm will sound and the en-
gine will shut off. This prevents high engine temperature
if the fan belt breaks.
Engine
Temperature
Gauge
Platform
Overload Light
Platform
Overload Light