Hudson 1955 Rambler, Техническое и сервисное руководство

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ALL SEASON AIR CONDITIONING SYSTEM 33
Install connector to wire on valve. Check
the valve by connecting jumper wire to
battery and listen to see if valve clicks
"On" and "Off".
Install gauge manifold set, evacuate,
and leak test system. Install charge, start
engine, and operate for 10 to 15 minutes
to check operation and pressures.
Filter and Sight Glass Removal
and Replacement
"Hornet" and "Wasp" Series
The filter and sight glass are located on
the right wheelhouse panel.
The filter provides protection against
dirt in the system. A fine mesh screen
catches dirt that might be circulating in
the system. It may be necessary to remove
it to clean the screen.
The sight glass provides a quick way of
determining whether or not the refrigerant
charge in the system is sufficient. A
shortage of refrigerant will be indicated
by the appearance of bubbles under the
sight glass. A brass cap protects the glass.
Whenever replacement of sight glass or
cleaning of the filter is necessary,
proceed as follows:
Clean the connections of dirt and oil.
Discharge the system.
Disconnect the flare nut connections of
the inlet side of the filter and on the
outlet connections of the sight glass.
The filter is held in place on the
wheelhouse panel by a metal clip. Remove
the screws and remove the filter and sight
glass.
After cleaning the filter or replacing
the sight glass, install gauge manifold
set, evacuate, and leak test the system.
Install a new charge. Start engine and
operate the system to observe operation and
check pressures. Make whatever corrections
are necessary.
"Rambler" Series
The "Rambler" Series sight glass (where
provided) is located in the high pressure
line on the left wheelhouse panel. Follow
the procedure outlined in the previous
section. The filter is located in the
discharge line muffler. The fine mesh wire
is a component part of the muffler. To
clean the filter, the discharge line
muffler must be removed.
Heat Exchanger
"Rambler" Series
The heat exchanger is made up of portions
of the high pressure line and suction line.
To remove, the system must be discharged.
Clean all connections of dirt and oil.
Disconnect the four connections, two
high pressure and two suction or low
pressure, and cap lines
After installing new heat exchanger,
install gauge manifold set. Evacuate the
system and leak test. Install charge. Start
engine and operate system and observe
pressures and check operation of system.
Expansion Valve Removal
and Replacement
No attempt should be made to adjust the
expanison valve. Should the valve show
malfunction upon diagnosis, replace the
valve.
Discharge the system.
Remove the front cover from the housing
on the "Hornet" and "Wasp" Series. Remove
the two air ducts, evaporator damper cable
and evaporator shroud on the "Rambler"
Series.
The expansion valve is then accessible for
service. Disconnect the high pressure inlet
line connection from the expansion valve.
Disconnect the equalizer and outlet con-
nection.
Note and mark the position of the power
element or thermo-bulb on the suction line.
When installing the replacement expansion
valve, the thermo-bulb of the replacement
valve must be attached in exactly the same
location on the suction line.
The expansion valve is provided with flats
upon which a wrench can be placed to help
break a connection. Always use two wrenches
of the correct size whenever breaking or
tightening a connection.
After installing the replacement expan-
sion valve, install the gauge manifold set;
evacuate the system and leak test. Install
new charge, start engine, and operate
system for 10 to 15 minutes to normalize the
system.
Observe the gauge, check the pressures,
and the operation of the system.
Removal of the Evaporator (Cooling Unit)
"Hornet" and "Wasp" Series
The evaporator is located in a retainer
housing under the right hand side of the
instrument panel. The retainer housing
attaches to the dash panel directly behind
the heater inlet and blower opening. To
remove, proceed as follows:
Discharge the system.
Remove the front cover from the retainer
housing.
Remove the glove box and the glove
mounting panel. Remove the left hand air
duct from its opening on the evaporator
retainer housing.
Disconnect the high pressure inlet line
at the expansion valve and also at the dash
panel inside the engine compartment.
Disconnect the suction line inside the
engine compartment. Plug and cap all lines
and expansion valve openings.
Remove the temperature control thermostat
capillary tube from the bottom of the
evaporator core.