Hudson 1955 Rambler, Technical & Service Manual

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38
T E C H N I C A L S E R V I C E M A N U A L
FIGURE 42— Tank "Full" Position
FIGURE 43— Cold Coolant Conditions of
Temperature Indicator
FIGURE 44— Hot Coolant Conditions of
Temperature Indicator
higher temperatures with a cold engine, the
constant voltage regulator is at fault and
should be replaced.
If both gauges read too low, either the
input voltage to the voltage regulator is too
low (below 5.0) or the voltage regulator is
not functioning properly and should be replaced
To check instrument cluster complete:
Connect accurate resistor of 73 ohms
between temperature indicator terminal and
case.
Connect accurate resistor of 59 ohms
between fuel indicator terminal and case.
Apply 6-8 volts between "IGN" terminal on
instrument voltage regulator and case.
Indicator pointers should be on "E" and "C"
marks. Duplicate same test except use 9 ohm
resistor in temperature gauge circuit to
ground and 10.9 ohm resistor in fuel gauge
circuit to ground. Indicator pointers
should be on "F" and "H" marks.
To check temperature indicator gauge in cluster:
With a current flow of .06 amperes plus or
minus .007 amperes through temperature
gauge, pointer should align with "C" mark.
With current of .208 amperes plus or minus
.006, pointer should be on "H" mark.
To check fuel indicator gauge in cluster:
With a current of .072 amperes plus or
minus .009 passed through indicator,
pointer should align with "E" mark. With
current of .195 amperes plus or minus .006,
pointer should align with "F" mark.
Electric Gauges
"Rambler" Series
The "Rambler" Series indicator units in the
instrument cluster are very much like those
of the "Hornet" and "Wasp" Series. However,
bi-metal type sending units are used. Figures
45, 46, 47, and 48 illustrate the schematic
circuit conditions in the bi-metal type
circuit.
FIGURE 45— Fuel Tank "Empty" Condition
"Rambler" Series
All Series
Gauge units may be tested but cannot be
repaired in the field. When one fails to
function properly, it is necessary to replace
it. Gauges can be removed from the rear of the
cluster. They are held in the cluster plate
by mounting screws.