Service manual

J
BODY
The thermometer
consists of
a thermometer and
thermaltransmitter located
in the
engine
block The
thermaltransmitter
is
equipped
with a
thermistor element
which converts
cooling
water
temperature
variation to a
resistance
and thus
the thermaltransmitler controls
current
flowing
to the
thermometer
The fuel meter and
thermometer
are
provided
with
bimetal arm and healer coil When the
ignition
switch
is
set to ON current flows to the heat coil and
the heat
coil is heated With this heat the bimetal ann
is bent and
thus the
pointer
connected
to
the bimetal ann is
operated
The characteristics
of both meters
are
same
A
tolerance
may
occur on the thermometer
of fuel
r
AEGULATOA
FUSE M
IGNITION
SWITCH
T
I
TEMPE
AATUAE
GAUGE
meter due to source
voltage
fluctuation The
voltage
regulator
is used to
supply
a constant
voltage
so that the
thermometer
and
fuel meter
operate
correctly
The
operating part
of the
regulator
consists
of
a
bimetal arm and a heater
coil
When the
ignition
switch is
turned on
the bimetal
arm
is heated and bent
by
the
coil
opening
the contact
Consequently
current to
the coil is
interrupted
As
the bimetal
cools
the
contact
closes
The
repetition
of this
operation produces
a
pulsating
voltage
of 8Y which is
applied
to the
temperature
and fuel
gauges
If
both the thermometer and fuel
meter
become
defective
at
the same
time this
may
be attributable to
trouble
in the
voltage regulator
GAUGE TANK UNIT
FUEL TANK
THEAMAL TAANSMITTEA
Fig
BE 25 Circuit
di4gram
for fuel
meter
temperature
meter and
voltage regulator
Replacement
1 With combination meter removed remove two set
screws used to secure fuel meter
or
thermometer
on
combination meter
housing
and remove fuel meter or
thermometer from combination meter
2
Install
fuel meter or thermometer
in
reverse
sequence
to
removal
BE
20