Hudson 1955 Rambler, Техническое и сервисное руководство

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34 TECHNICAL SERVICE MANUAL
Remove the screws on top outside of housing
that hold the evaporator core in place in the
retainer housing.
Remove the evaporator core from its housing.
The expansion valve can be removed after
core has been removed from housing.
After installing the evaporator core,
install gauge manifold set, evacuate, and
leak test the system. Charge the system.
Start the engine and operate the system for
10 to 15 minutes to normalize the system.
Observe the gauges and check the pressures.
"Rambler" Series
Remove evaporator damper control cable,
two air ducts and evaporator shroud.
Remove water control valve cable from water
control valve operating cam.
Disconnect high pressure inlet line at
expansion valve.
Disconnect suction line from heat ex-
changer inside engine compartment at dash
panel. Plug and cap all lines and expansion
valve.
Disconnect temperature control thermostat
wires.
Remove evaporator core from dash panel. The
expansion valve can be removed on the bench.
After replacement of core, install the
gauge manifold set, evacuate, and leak test
the system.
Charge the system. Start the engine and
operate system for 10 to 15 minutes to
normalize system.
Observe gauges and check pressures.
Temperature Control Thermostat
"Hornet" and "Wasp" Series
The temperature control thermostat is located
on the top right hand side of the evaporator
retainer housing; the capillary sensing tube
is inserted through an opening in the bottom
of the evaporator core into the coldest
portion of the evaporator.
Approximately 5" of the sensing tube must
be in between the fins of the evaporator core.
To remove the control thermostat, remove
the evaporator cover.
"Rambler" Series
The temperature control thermostat is located
on the right hand evaporator core side plate.
The capillary sensing tube is inserted
through an opening in the top of the
evaporator core.
Approximately 5" of the sensing tube must
be in between the fins of the evaporator core.
To remove the control thermostat, remove the
right
right hand air duct. The thermostat is now
accessible for removal.
Removal of Blower Fan and Motor
"Hornet" and "Wasp" Series
Remove the heater hopper box cover. Remove
air filter.
Drain a quart and a half of coolant from
the radiator to flow the heater core to he
drained.
Remove heater core.
Disconnect the wire leads to the blower
motor on the outside of the blower housing
at the resistor.
Remove the inlet ring on the right hand
side of the heater hopper box.
Remove blower fan from the blower motor
shaft. Remove fan through heater hopper box
cover opening.
Remove the blower motor from the blower
housing and remove through the heater
hopper box cover opening.
"Rambler" Series
Disconnect wire lead to motor.
Remove blower motor housing support
brackets from wheelhouse panel and dash
panel.
Remove screws from blower motor mounting
plate.
The blower motor and fan may be removed
as an assembly from the blower motor
housing. Any further service may be per-
formed on the bench.
SERVICE DIAGNOSIS
To obtain full capacity performance of the
air conditioning system, it is necessary
that all components function properly.
Diagnosis of some of the components that
may show malfunction are somewhat diffi-
cult to detect. The following describes the
sequence and methods that might be used to
determine whether the unit or part is
functioning properly. Also outlined are
some of the symptoms that will indicate
malfunction of the system. Use the gauge
set in diagnosis of the system.
The following chart may be used during a
road test in diagnosing the system. The
ambient temperatures and road speed given
should be used when road testing the
system. Should the temperature vary be-
tween those given in the chart, a mean
average should be worked out.
Long copper tubes to replace the gauge
lines should be fabricated to enable the
operator to have the gauge set in the car.
This way he can observe the gauges to check
the pressures. The thermometers should be
placed at the air discharge outlets.