Snorkel TB85J CE - Manual (Page 21)

Chapter 4 – Safety Devices
TB80/TB85J – 0112622EE 17
The horn will sound and the light will stay on until the
excess load is removed from the platform and the start
switch is turned off and back on, resetting the system.
At that time, the boom and drive functions are opera-
tional.
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 ma-
chine is being driven with the main boom below horizon-
tal and fully retracted. 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
top of the lower control panel (refer to Figure 4.7).
High Engine Temperature Alarm
If the coolant in a Cummins engine exceeds the engine
operating temperature an alarm will sound and the en-
gine will shut off.
If the oil in a Deutz engine exceeds 110°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 engine will shut off. This prevents high
engine temperature if the fan belt breaks.
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. Do not restart the engine until
the condition that caused the low oil pressure has been
corrected.
Platform Overload Sensing System
Boom and drive functions are stopped when the platform
load reaches or exceeds rated capacity. The horn will
sound intermittently and the red light (refer to Figure 4.6)
will illuminate when the platform rated work load is ex-
ceeded.
Figure 4.6 – Upper Controls
The horn will sound and the light will flash until the ex-
cess load is removed from the platform. At that time, the
boom and drive functions are again operational.
If the overload exceeds rated platform capacity by more
than 20 percent, the system will error out, stopping all
boom and drive functions. The horn will then sound con-
tinuously and the red light will stay illuminated at the
upper and lower controls (refer to Figure 4.7).
Figure 4.7 – Lower Control Panel
Platform
Overload Light
Engine
Temperature
Gauge
Platform
Overload Light