High Rpm Shutdown Switch - Westerbeke 8.0KW-60Hz Service Manual

HIGH RPM SHUTDOWN SWITCH
DESCRIPTION
An overspeed switch in the DC circuit shuts off the
generators engine by grounding out the ignition system if
the engine's
s~
reaches 2175 rpm (approximately).
After correcting the problem, this switch can be reset by
momentariJy depressing the stop switch. Refer to the
WIRING DIAGRAMS in this manual.
If the overspeed switch is faulty, (resetting with the stop
switch fails to reset the circuit), lift the white/yellow wire
off the T5 terminal and connect it with the redlpurple wire
on the T4 terminal. Now restart the generator.
If this bypass is successful, replace the faulty overspeed
switch.
NOTE:
Overs peed switches draw a small amaunt of amperage
(25 milliamps) at all times once the generator is connected
to its starting battery. This amounts to approximately 18
amp-hnurs in a month. It is not necessary to be concerned
with this slight amperage draw during normal seasonal
operation. However,
if
the generator set is to be unused for
many months, it is best to either remove the 8 amp ignition
fuse from the control panel on the generator or tum off the
generator~
starting battery switch.
OVERSPEEO
CIRCUIT
BOARD
A
CAUTION:
It
is very important that the overspeed
shutdown always be instal/ed and functioning. Any
tampering with the overspeed shutdown module, which
would cause it
to
malfunction. could be
a
cause
of
injury should·the generator's belt·driven governor fail
and cause the generator
to
run away.
~
WESJERBEKE
Engines
&
Generators
7