Snorkel TB120 2001 - Manual (Page 28)

5. AUTOMATIC SHUT-OFFS
5 - 1 P/N 0191914
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AUTOMATIC SHUT-OFFS
There is a light inside the EMERGENCY STOP
switch at both the ground-control box and the
platform-control box.
The lights come on if the engine temperature,
engine oil pressure, or alternator current gets
outside preset values. When the EMERGENCY
STOP light comes on, immediately lower the
platform and correct the problem. Use
EMERGENCY POWER OPERATION to lower
the platform to the ground if the engine has
automatically shut off. Use EMERGENCY
BLEED DOWN only if EMERGENCY POWER
OPERATION does not work (see “EMERGENCY
OPERATION” chapter for instructions).
Y Y Engine Temperature
If the engine temperature (check the
TEMPERATURE gauge) of either a Continental
or Cummins engine reaches 210
°F (99°C) the
lights in the EMERGENCY STOP switches will
come on. If the engine temperature continues to
climb to 230
°F (110°C) the engines will
automatically shut off and cannot be restarted
until they cool. Check engine coolant level (see
“DAILY INSPECTION & MAINTENANCE”
chapter) before you try to restart the engine. If
the coolant is low, replenish it then check for
leaks. If the engine will not restart, or if it
automatically shuts off a second time, refer the
problem to a qualified service technician.
Y Y Engine Oil Pressure
If the engine oil pressure in either a Continental
or Cummins engine drops to an unsafe level, the
lights in the EMERGENCY STOP switches come
on and the engine automatically shuts off. Check
engine oil level (see “DAILY INSPECTION &
MAINTENANCE” chapter) before you try to
restart the engine. If the engine oil is low,
replenish it then check for leaks. Check the
engine oil filter to be sure it is in place and tight.
If the engine will not restart, or if it automatically
shuts off a second time, refer the problem to a
qualified service technician.
Y Y Alternator Not Charging
If the alternator on either a Continental or
Cummins engine fails, the lights in the
EMERGENCY STOP switches come on. The
TB120 will continue to run until the batteries get
too weak to work, then the engine will
automatically shut off. Check the alternator drive
belt to see if it is broken or loose before you try
to restart the engine. If the engine will not restart,
or if it starts but the EMERGENCY STOP light is
still on, refer the problem to a qualified service
technician.
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CIRCUIT BREAKERS
There are 11 circuit breakers on a TB120. Their
purpose is to protect electrical circuits from
electrical overloads.
Three are on the platform-control box.
5. AUTOMATIC SHUT-OFFS
& CIRCUIT BREAKERS