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. 7).
Due to the different characteristics of R-134a it
requires all new service procedures.
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.
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 0.57 Kg. (20 oz. or 1.25 lbs.) of R-134a refrig-
erant.
NOTE: The condenser has been changed on 1999
models. The System Charge Level Specifications
and Charge Determination Graph were not available
at the time of printing. A Technical Service Bulletin
will be issued for insertion into the manual when
data becomes finalized.
Fig. 5 Refrigerant Recovery/Recycling Station -
Typical
Fig. 6 Manifold Gauge Set - Typical
Fig. 7 Underhood Label
24 - 10 HEATING AND AIR CONDITIONING JA
SERVICE PROCEDURES (Continued)
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