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
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, VEN-
TILATE WORK AREA BEFORE RESUMING SER-
VICE.
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
available through the Chrysler Professional Service
Equipment (PSE) program. This probe is compatible
with temperature-measuring instruments that accept
Type K Thermocouples and have a miniature connec-
tor input. Other temperature probes are available
through aftermarket sources. All references in this
manual will reflect the use of the probe made avail-
able through the Professional Service Equipment pro-
gram.
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 pro-
gram.
Fig. 8 Refrigerant Recovery/Recycling Station -
Typical
1 – R-134 REFRIGERANT RECOVERY MACHINE
Fig. 9 Manifold Gauge Set - Typical
1 – LOW PRESSURE GAUGE
2 – HIGH PRESSURE GAUGE
3 – VALVE
4 – VACUUM/REFRIGERANT HOSE (YELLOW W/BLACK STRIP)
5 – HIGH PRESSURE HOSE (RED W/BLACK STRIP)
6 – LOW PRESSURE HOSE (BLUE W/BLACK STRIP)
7 – VALVE
LH HEATING AND AIR CONDITIONING 24 - 13
SERVICE PROCEDURES (Continued)
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