Hudson 1955 Rambler, Technical & Service Manual

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T E C H N I C A L S E R V I C E M A N U A L
idling during the refilling operation to
prevent trapped air interferring with the
circulation or Weather Eye operation.
A drain cock is provided on the lower tank
of the radiator to drain the cooling system.
On the "Hornet" V-8 Series, two cylinder
block pipe plug drains are also provided, one
on the left side lower center, and the other
on the right side lower rear.
ELECTRICAL Capacities
"Hornet" V-8 Series 28 Qts.
"Hornet" 6 Series 19-1/2 Qts.
"Wasp" Series 14 Qts.
"Rambler" Series 12 Qts.
Radiator Filler Cap
The cooling system radiator filler cap is an
atmospheric vented cap. The atmospheric vent
valve closes only if there is, a coolant
vapor flow through the vent valve of .4 to
.7 cubic feet per minute. When the vent valve
closes, the system will become pressurized
61/4 to 73/4 pounds per square inch. Pressur-
izing the cooling system increases the
boiling point of the coolant.
On models equipped with air conditioning, the
pressure cap pressurizes the cooling system
12 to 15 pounds per square inch.
FIGURE 6— Cross Section Radiator
Filler Cap
THERMOSTAT
"Hornet" 6, "Wasp", and "Rambler"
Series
A thermostat is located in the cylinder head
water outlet housing to insure proper engine
operating temperatures for maximum economy
and engine life. Always use a thermostat as
an engine may be overcooled as well as
over-heated.
"Hornet" V-8 Series
The thermostat is located in the coolant
distribution manifold outlet. A restricted
passage permits the coolant to circulate
through the water pump and cylinder block
when the thermostat is closed, thus by-
passing the radiator core.
All Series
NOTE: The thermostat should be checked
whenever the cooling system is serviced
and particularly at the time of instal-
lation of antifreeze solution.
FAN ASSEMBLY
"Hornet" and "Wasp" Series
An "X" type fan is attached to a hub on the
water pump shaft. When equipped with air
conditioning, a five blade fan is used.
"Rambler" Series
A four blade fan is mounted on an adjustable
bracket on the front of the engine block.
When equipped with air conditioning, a five
blade fan is used.
Fan Belt Adjustment
"Hornet" 6 and "Wasp" Series
The fan belt is adjusted by moving the
generator on its mounting bracket to obtain
a deflection of approximately 3/4" inward at
a point midway between the water pump and
generator pulleys.
"Hornet" V-8 Series
The fan belt is adjusted by moving the
generator on its mounting bracket to obtain
a deflection of approximately 1/2" inward at
a point midway between the water pump and
generator pulleys.
"Rambler" Series
The fan belt is adjusted by moving the fan
assembly in a horizontal plane. The fan belt
should be adjusted so that upon application
of 25 pounds pressure, at a point midway
between the fan and generator pulleys, it
will deflect approximately 1/2".
All Series
It is important that the proper tension of
the fan belt is maintained to insure effi-
cient operation of the cooling and electrical
systems. Too much tension will cause exces-
sive wear on the fan and generator bearings.