Chrysler New Yorker. Manual - part 333

SYSTEM OIL LEVEL

It is important to have the correct amount of lubri-

cant in the A/C system to ensure proper lubrication
of the compressor. Too little lubricant will result in
damage to the compressor. Too much lubricant will
reduce the cooling capacity of the system and conse-
quently result in higher discharge air temperatures.

The lubricant used in the compressor is polyalka-

lene glycol PAG lubricant. Only the refrigerant lubri-
cant approved for use with this vehicle (ND8 PAG
oil) should be used to service the system. Do not use
any other lubricant. The lubricant container should
be kept tightly capped until it is ready for use.
Refrigerant lubricant will quickly absorb any mois-
ture it comes in contact with.

It is not necessary to check or add lubricant unless

it has been lost. Lubricant loss at the leak point will
be evident by the presence of a wet, shiny surface
around the leak.

REFRIGERANT OIL LEVEL CHECK

When an air conditioning system is first assem-

bled, all components (except the compressor) are
refrigerant oil free. After the system has been
charged with (R-134a) refrigerant and operated, the
oil in the compressor is dispersed through the lines
and components. The evaporator, condenser, and
receiver/drier will retain a significant amount of oil.
Refer to the A/C Component Refrigerant Oil Capaci-
ties table. When a component is replaced, the speci-
fied amount of refrigerant oil must be added. When
the compressor is replaced, the amount of oil that is
retained in the rest of the system must be drained
from the replacement compressor. The oil capacity of
the system, minus the amount of oil still in the
remaining components (refer to the oil capacity chart
below) can be measured and poured into the suction
port of the compressor. When a line or component
has ruptured and oil has escaped, the receiver/drier
must be replaced along with the ruptured part.

Example: On an A/C system the evaporator retains 60

ml. (2 oz.). The condenser retains 30 ml. (1 oz.) of oil,
and system capacity may be 150 ml. (5.00 oz.) of oil.

150 ml. minus 90 ml. equals 60 ml. (2.00 oz.).

CAUTION: The refrigerant oil used in a R-134a A/C
system

unique.

Use

only

oils

which

were

designed to work with R-134a refrigerant. The oil
designated for this vehicle is ND 8 PAG (polyalka-
lene glycol).

VERIFY REFRIGERANT ND8 LUBRICANT
LEVEL

(1) Discharge refrigerant system using a recycling/

reclaiming equipment if a charge is present.

(2) Disconnect refrigerant lines from A/C compres-

sor. Cap the open lines to prevent moisture from
entering system.

(3) Remove compressor from vehicle.
(4) From suction and discharge ports on top of

compressor, drain lubricant from compressor.

(5) Add system capacity minus the capacity of

components that have not been replaced. Refer to the
A/C Component Refrigerant Oil Capacities chart
above. Add lubricant through the suction and dis-
charge ports on compressor. This is not to exceed 150
ml. (5.00 oz.) in total.

(6) Install

compressor

and

connect

refrigerant

lines. Then evacuate and charge refrigerant system.

(7) Most reclaim/recycling equipment will measure

the lubricant being removed. This amount of lubri-
cant should be added back to the system. If a new
compressor is being installed, drain lubricant from
old compressor, measure the amount drained and dis-
card old lubricant. Drain the lubricant from the new
compressor

into

clean

container.

Return

the

amount of lubricant measured from the old compres-
sor, plus the amount reclaimed from the system back
into the new compressor.

SERVICE PROCEDURES

EVACUATING REFRIGERANT SYSTEM

NOTE: Special effort must be used to prevent mois-
ture from entering the A/C system oil. Moisture in
the oil is very difficult to remove and will cause a
reliability problem with the compressor.

If a compressor designed to use R-134a refrigerant

is left open to the atmosphere for an extended period
of time. It is recommended that the refrigerant oil be
drained and replaced with new oil or a new compres-
sor be used. This will eliminate the possibility of con-
taminating the refrigerant system.

If the refrigerant system has been open to the

atmosphere, it must be evacuated before the system
can be filled. Moisture and air mixed with the refrig-
erant will raise the compressor head pressure above
acceptable operating levels. This will reduce the per-

A/C COMPONENT REFRIGERANT OIL

CAPACITIES

COMPONENT NAME

ml.

oz.

Total Air Conditioning System

150 ml.

5.00 oz.

Condenser

30 ml.

1.00 oz.

Evaporator

59 ml.

2.00 oz.

Filter/Drier

30 ml.

1.00 oz.

Line Blown

44 ml.

1.50 oz.

300M

HEATING AND AIR CONDITIONING

24 - 11

DIAGNOSIS AND TESTING (Continued)

formance of the air conditioner and damage the com-
pressor. Moisture will boil at near room temperature
when exposed to vacuum. To evacuate the refrigerant
system:

NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.

(1) Connect a suitable charging station, refrigerant

recovery machine, and a manifold gauge set with
vacuum pump (Fig. 6).

(2) Open suction and discharge valves and start

vacuum pump. The vacuum pump should run a min-
imum of 45 minutes prior to charge, to eliminate all
moisture in system. When suction gauge reads -88
kPa (-26 in. Hg) vacuum or greater for 45 minutes,
close all valves and turn off vacuum pump. If the
system fails to reach specified vacuum, the
refrigerant system likely has a leak that must
be corrected. If the refrigerant system maintains
specified vacuum for at least 30 minutes, start the
vacuum pump, open the suction and discharge
valves. Then allow the system to evacuate an addi-
tional 10 minutes.

(3) Close all valves. Turn off and disconnect the

vacuum pump.

(4) The refrigerant system is prepared to be

charged with refrigerant.

R-134a REFRIGERANT

This vehicle uses a refrigerant called R-134a. It is

a non-toxic, non-flammable, clear colorless liquefied
gas.

R-134a refrigerant is not compatible with R-12

refrigerant in an air conditioning system. Even a
small amount of R-12 in a R-134a system could cause
compressor failure, refrigerant oil sludging or poor
performance.

Never

add

R-12

system

designed to use R-134a. System failure will
occur.

The service ports for the 3.2 / 3.5L applications are

located on the compressor(Fig. 7). The service ports
for the 2.7L application are located on the A/C liquid
(high pressure) and suction (low pressure) lines.
R-134a service ports have been used to ensure that
the system is not accidentally filled with the wrong
refrigerant.

When servicing a system, it is required that an air

conditioning charging recovery/recycling machine be
used (Fig. 8). Contact an automotive service equip-
ment supplier for proper equipment. Refer to the
operating instructions provided with the equipment
for proper operation.

A manifold gauge set (Fig. 9) must also be used in

conjunction with the charging and/or recovery/recy-
cling device. Only use gauges that have not been
used for R-12. The service hoses on the gauge set
should have manual (turn wheel) or automatic back
flow valves at the service port connector ends. This
will prevent refrigerant R-134a from being released
into the atmosphere.

R-134a refrigerant requires a special type of com-

pressor oil. When adding oil, make sure that it is
designed to be used in a R-134a system. Refer to the
label under the hood for proper oil and refrigerant
charge levels

Fig. 6 Gauge Set or Refrigerant Recovery Machine

Hookup (3.2 / 3.5L)

Fig. 7 A/C Service Ports (3.2 / 3.5L)

24 - 12

HEATING AND AIR CONDITIONING

300M

SERVICE PROCEDURES (Continued)

WARNING: AVOID

BREATHING A/C

REFRIGERANT

AND LUBRICANT VAPOR OR MIST. EXPOSURE MAY
IRRITATE EYES, NOSE AND THROAT. USE ONLY
APPROVED

SERVICE

EQUIPMENT

MEETING

SAE

REQUIREMENTS TO RECLAIM R-134a SYSTEMS. IF
ACCIDENTAL SYSTEM DISCHARGE OCCURS, VENTI-
LATE WORK AREA BEFORE RESUMING SERVICE.

R-134a SERVICE EQUIPMENT OR VEHICLE A/C

SYSTEM SHOULD NOT BE PRESSURE TESTED OR
LEAK TESTED WITH COMPRESSED AIR. SOME
MIXTURES OF AIR and R-134a HAVE BEEN SHOWN
TO BE COMBUSTIBLE AT ELEVATED PRESSURES.
THESE MIXTURES ARE POTENTIALLY DANGER-
OUS AND MAY RESULT IN FIRE OR EXPLOSION
CAUSING INJURY OR PROPERTY DAMAGE.

The use of R-134a will have a positive environmen-

tal impact due to it’s zero ozone depletion and low
global warming impact.

THERMOCOUPLE PROBE

To diagnose the LH A/C system, a temperature probe

is required to measure liquid line temperature. The
clamp-on type K probe shown in this manual is avail-
able through the Chrysler Professional Service Equip-
ment (PSE) program. This probe is compatible with
temperature-measuring instruments that accept Type K
Thermocouples and have a miniature connector input.
Other temperature probes are available through after-
market sources. All references in this manual will
reflect the use of the probe made available through the
Professional Service Equipment program.

In order to use the temperature probe, a digital

thermometer will be required. If a digital thermome-
ter is not available, an adapter is available through
the Professional Service Equipment program. It can
convert any standard digital multimeter into a ther-
mometer. This adapter is designed to accept any
standard K-type thermocouple.

If a digital multimeter is not available, it to can be

ordered through Professional Service Equipment
program.

SYSTEM CHARGE LEVEL

TO CHECK OR FILL SYSTEM

The procedure below should be used to check

and/or fill the refrigerant charge in the air condition-
ing system.

NOTE: The air conditioning system in this vehicle holds
0.71 Kg. (25 oz. or 1.56 lbs.) of R-134a refrigerant.

This procedure can be performed two different

ways:

• With a scan tool (DRB) and a thermocouple (Fig.

10). Use the scan tool (DRB) diagnostic topic: Partial
Charge Test. Refer to the proper Body Diagnostic
Manual.

• Using a manifold gauge set (Fig. 11), a thermo-

couple and the Charge Determination Graph (Fig.
12). It is recommended to use the gauges or reclaim/
recycle equipment.

Fig. 8 Refrigerant Recovery/Recycling Station -

Typical

Fig. 9 Manifold Gauge Set - Typical

300M

HEATING AND AIR CONDITIONING

24 - 13

SERVICE PROCEDURES (Continued)

WARNING: AVOID

BREATHING A/C

REFRIGERANT

AND LUBRICANT VAPOR OR MIST. EXPOSURE MAY
IRRITATE EYES, NOSE AND THROAT. USE ONLY
APPROVED

SERVICE

EQUIPMENT

MEETING

SAE

REQUIREMENTS TO DISCHARGE R-134a SYSTEM. IF
ACCIDENTAL SYSTEM DISCHARGE OCCURS, VENTI-
LATE WORK AREA BEFORE RESUMING SERVICE.

R-134a SERVICE EQUIPMENT OR VEHICLE A/C

(1) Establish your preferred method of measuring

compressor discharge pressure. Use a manifold gauge
set or a scan tool.

(2) Attach a clamp-on thermocouple (P.S.E. 66-324-

0014 or 80PK-1A) or equivalent to the liquid line
(Fig. 10). It must be placed as close to the condenser

outlet as possible to observe liquid line tubing tem-
perature. Refer to “Thermocouple Probe” in this sec-
tion for more information on probe.

(3) The vehicle must be in the following modes:
• Transaxle in Park

• Engine Idling

• A/C Controls Set to Outside Air

• Panel Mode

• Full Cool

• High Blower

• A/C Button in the ON position

• Vehicle Windows Open.

• Recirc button turned OFF on ATC equipped

vehicles

(4) Operate system for a couple of minutes to allow

the system to stabilize.

(5) Set system pressure to about 1793 kPa (260

psi) by blocking off the airflow to the front grill area.
This will maintain a constant pressure and stop the
cooling fans from alternating between high and low
speeds.

(6) Observe Discharge pressure and Liquid line

temperature. Using the Charge Determination Graph
determine where the system is currently operating
(Fig. 12). If the system is in the undercharged region,
ADD 0.057 Kg. (2 oz.) to the system and recheck
readings. If the system is in the overcharged region,
RECLAIM 0.057 Kg. (2 oz.) from the system and
recheck readings. Continue this process until the sys-
tem readings are in the proper charge area on the
Charge Determination Chart (Fig. 12).

(7) The scan tool procedure does not require the

Charge Determination Graph. The correct liquid line
temperature range is calculated by the scan tool
automatically.

SYSTEM LEAK CHECKING

WARNING: R-134a SERVICE EQUIPMENT OR VEHI-
CLE A/C SYSTEM SHOULD NOT BE PRESSURE
TESTED OR LEAK TESTED WITH COMPRESSED
AIR. MIXTURE OF AIR and R-134a CAN BE COM-
BUSTIBLE AT ELEVATED PRESSURES. THESE MIX-
TURES ARE POTENTIALLY DANGEROUS AND MAY
RESULT IN FIRE OR EXPLOSION CAUSING INJURY
OR PROPERTY DAMAGE.

AVOID BREATHING A/C REFRIGERANT AND LUBRI-

CANT VAPOR OR MIST. EXPOSURE MAY IRRITATE
EYES, NOSE AND THROAT. USE ONLY APPROVED
SERVICE EQUIPMENT MEETING SAE REQUIREMENTS
TO DISCHARGE R-134a SYSTEM. IF ACCIDENTAL
SYSTEM DISCHARGE OCCURS, VENTILATE WORK
AREA BEFORE RESUMING SERVICE.

If the A/C system is not cooling properly, determine

if the refrigerant system is fully charged with
R-134a. This is accomplished by performing a system

Fig. 10 Thermocouple Attachment Point (3.2 / 3.5L)

Fig. 11 Manifold Gauge Hook-up (3.2 / 3.5L)

24 - 14

HEATING AND AIR CONDITIONING

300M

SERVICE PROCEDURES (Continued)

Content .. 331 332 333 334 ..