2500 4x4 Pickup V8-360 5.9L VIN 5 Magnum (1994)
Refrigerant: Technical Service Bulletins
R 134A Refrigerant - Leak Detection
NO.: 24-13-94
GROUP: Air Conditioning
DATE: Sep. 9, 1994
SUBJECT:
R-134a Refrigerant Leak Detection
MODELS:
1994 - 1995
(AA)
Spirit/Acclaim/Lebaron Sedan
1994 - 1995
(AB)
Ram Van/Ram Wagon
1994 - 1995
(AJ)
LeBaron Coupe/LeBaron Convertible
1994 - 1995
(AN)
Dakota/Dakota Cab & Chassis
1994
(AP)
Shadow/Sundance
1993 - 1995
(AS)
Caravan/Voyager/Town & Country
1994
(BD)
Laser/Talon (Midyear Change)
1994 - 1995
(BR)
Ram Truck
1994 - 1995
(B7)
Stealth
1994 - 1995
(B8)
Colt Vista/Summit Wagon
1994 - 1995
(B9)
Colt/Summit
1994 - 1995
(ES)
Chrysler Voyager (Export Only)
1995
(FJ)
Avenger/Sebring/Talon
1995
(JA)
Cirrus/Stratus
1993 - 1995
(LH)
Concorde/Intrepid/Vision/LHS/New Yorker
1995
(PL)
Neon
1993 - 1995
(SR)
Viper
1994 - 1995
(XJ)
Cherokee
1994 - 1995
(YJ)
Wrangler
1993 - 1995
(ZJ)
Grand Cherokee/Grand Wagoneer
DISCUSSION:
R-134a refrigerant leaks are more difficult to detect than R-12 because of the smaller molecular structure. Listed below are the R-134a leak detection
units currently approved by Chrysler and SAE:
HITECH Instruments Models HI 300 TEL, H1350, HI 400 NOVA TEL, and Hi 450 NOVA
Leybold Inficon Models HLD4000 and D/TEC
OTC/Yokogawa Model H10N
NOTE:
LEAK DETECTOR PROBES ARE VERY SENSITIVE TO CONTAMINANTS. DO NOT EXPOSE PROBES TO LUBRICANTS, PAINT,
WELDING AND MASTIC FUMES, VEHICLE FUEL, EXHAUST OR COOLANT, HALOGENATED SOLVENTS, CHLORINATED WATER
OR STEAM, DUST, POWDER, OR DIRECT STREAMS OF R-12 OR R134a. ANY TIME CONTAMINATION IS VISUALLY PRESENT ON
THE PROBE, OR THE PROBE IS SUSPECTED OF BEING NEAR A CONTAMINANT, FOLLOW THE MANUFACTURERS
RECOMMENDATION FOR CLEANING OR REPLACING THE FILTER/SENSOR. ONLY A PROPERLY MAINTAINED LEAK DETECTOR
WILL PROVIDE ACCURATE LEAK DETECTION.
TECHNICIAN PROCEDURE FOR USING ELECTRONIC REFRIGERANT LEAK DETECTORS FOR SERVICE OF MOBILE AIR
CONDITIONING SYSTEMS
SAE Recommended Practice J1628
1.
The electronic leak detector shall be operated in accordance with the equipment manufacturer's operating instructions.
2.
Leak test with the engine not in operation.
3.
The air conditioning system shall be charged with sufficient refrigerant to have a gauge pressure of at least 340 kPa (50 psi) when not in operation.
At temperatures below 15~C (59~F), leaks may not be measurable since this pressure may not be reached.