Benelli ZAFFERAN 250, Service Manual

Page: 161 / 187

161
DO: clean bypass when the seat is
removed. Ensure stable idle speed.
DO: if idle screws are removed, replace
the o-ring.
Ensure no air leakage from the o-ring.
DON
’T: use any fallen or defective
component.
Possible inner damage.
Forbidden: no protective cap for storage
parts. Possible impact on normal work due
to pollution.
DON
’T: no protection during transportation
or transfer around salt spray.
Possible impact on normal work due
to corrosion.
DON
’T:
completely exposed
to the environment (humidity)
before assembly.
Possible impact on normal work due
to corrosion.
DON
’T: tested voltage exceeds the
system voltage.
Possible damage.
DON
’T: use excessively tightening torque.
Possible damage.
DON
’T: hammer the fuel injector for
troubleshooting when there is an error.
Damage to the fuel injector.
DON
’T: components bump into each other
when being unpacked.
Possible impact on the minimum air
leakage or other damage.
DON
’T: completely release the throttle at
any position.
Possible damage.
DON
’T: block the bypass hole with dirt
or sand.
Possible impact on the stability of
idle speed.
DON
’T: take, store or hold components in
a way of possibly touching other parts.
Possible damage.
17.2.4 Water Temperature Sensor
17.2.4.1 General Working Principle
This water temperature sensor for the engine cylinder head is used for water-cooled engines to
measure the temperature of the cylinder head. Within the temperature range of this sensor, its
resistance varies upon the engine temperature. Its character refers to negative temperature
coefficient resistance. It is not maintainable.