how much 134a refrigerant goes into a ml320 ac
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Filed Under (Acura) by admin on 15-06-2010
USING R-12 & R-134a REFRIGERANT HANDLING/SAFETY PRECAUTIONS 1) Always work in a well-ventilated, clean area. Avoid breathing refrigerant vapors. Exposure may irritate eyes, nose and throat. Refrigerant is colorless and is invisible as a gas. Refrigerant is heavier than oxygen and will displace oxygen in a confined area. 2) The A/C system high pressure can cause severe injury to eyes and skin if a hose were to burst. Always wear eye protection, gloves and other protective clothing when working around A/C system and refrigerant. 3) Refrigerant evaporates quickly when exposed to atmosphere, freezing anything it contacts. If liquid refrigerant contacts eyes or skin (frostbite), DO NOT rub eyes or skin. Immediately flush affected area with cool water for 15 minutes and consult a doctor or hospital. 4) Never use R-134a in combination with compressed air for leak testing. Pressurized R-134a in the presence of oxygen (air concentrations greater than 60 percent by volume) may form a combustible mixture. DO NOT introduce compressed air into R-134a containers (full or empty), A/C system components or service equipment.
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Filed Under (Toyota) by admin on 15-06-2010
1995-96 A/C Compressor Refrigerant Oil Checking All Models * PLEASE READ THIS FIRST * CAUTION: DO NOT exceed A/C system refrigerant oil capacity, when servicing system. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS. See the COMPRESSOR SERVICING article for compressor servicing procedures. SERVICING PRECAUTIONS DISCHARGING SYSTEM Discharge A/C system, using approved refrigerant recovery/recycling equipment. Always follow recovery/recycling equipment manufacturer’s instructions. After refrigerant recovery process is completed, the amount of compressor oil removed must be measured and the same amount added to A/C system. DISCONNECTING LINES & FITTINGS After system is discharged, carefully clean area around all fittings to be opened. Always use 2 wrenches when tightening or loosening fittings. Some refrigerant lines are connected with a coupling. Special tools may be required to disconnect lines. Cap or plug all openings as soon as lines are removed. Remove caps until connections of lines and fittings are to be completed. CONNECTING LINES & FITTINGS
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1. RUN ENGINE AT APPROX. 1,500 RPM 2. OPERATE AIR CONDITIONER AT MAXIMUM COOLING FOR A FEW MINUTES 3. CHECK AMOUNT OF REFRIGERANT Observe the sight glass on the receiver. Insufficient* (1) Check for gas leakage with gas leak Bubbles present in sight glass tester and repair if necessary (2) Add refrigerant until bubbles disappear Refer to items 3 and 4 No bubbles present in sight glass None, sufficient or too much Empty or nearly empty (1) Check for gas leakage with gas leak No temperature difference between tester and repair if necessary compressor inlet and outlet (2) Add refrigerant until bubbles disappear Refer to items 5 and 6 Proper or too much Temperature between compressor inlet and outlet is noticeably different (1) Recover refrigerant Immediately after air conditioner is turned Too much (2) Evacuate air and charge proper off, refrigerant in sight glass stays clear amount of purified refrigerant When air conditioner is turned off, Proper refrigerant foams and then stay clear
Filed Under (Chrysler) by admin on 30-06-2010
HVAC HOUSING REMOVAL The instrument panel must be removed in order to remove the heater-A/C Housing. Refer to: “Instrument Panel, Gauges and Warning Indicators : Instrument Panel : Service and Repair” See: Instrument Panel, Gauges and Warning Indicators\Instrument Cluster / Carrier\Service and Repair WARNING: THE R-134a REFRIGERANT SYSTEM MUST BE RECOVERED BEFORE SERVICING ANY PART OF THE REFRIGERANT SYSTEM. 1. Using a refrigerant recovery machine, remove the refrigerant from the A/C system, if equipped. Refer to: “Heating and Air Conditioning : Service and Repair” See: Service and Repair 2. Remove instrument panel from vehicle. Refer to: Body and Frame, Interior Trim, Dashboard/Instrument Panel, Service and Repair, Instrument Panel Service Procedures, Instrument Panel Assembly Replacement, See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Service Procedures\Instrument Panel Assembly Replacement 3. Drain cooling system. Refer to: “Engine, Cooling and Exhaust : Cooling System : Service and Repair” See: Engine, Cooling and Exhaust\Cooling System\Service and Repair 4. Remove heater hoses at the dash panel. Place plugs in the heater core outlets to prevent coolant spillage during unit housing removal. 5. Unfasten coolant recovery container and set aside. 6. Remove suction line at expansion valve. Cap open refrigerant lines to prevent moisture and/or dirt from entering. 7. Remove expansion valve from evaporator, and cap fittings. 8. Remove rubber drain tube extension from condensation drain tube.
Filed Under (Mercedes-Benz) by admin on 11-06-2010
2000 Mercedes-Benz ML320 3.2L 2001 Mercedes-Benz E320 3.2L 2001 Mercedes-Benz C240 2.6L 2001 Mercedes-Benz E320 4Matic 3.2L 2001 Mercedes-Benz C320 3.2L 2002 Mercedes-Benz ML320 3.2L Potential Causes: Pedal Sensor Throttle Body Wiring Tech Tips: With new sensor the throttle stops must be relearned. Use compatible scan tool and perform adaptations. ALWAYS verify charging system voltage is correct. Tests/Procedures: 1. Connect scan tool and monitor voltages of pedal sensor B37. Signal 1 (Accelerator pedal position: Idle speed):[0.2...0.5] V Signal 2 (Accelerator pedal position: Idle speed):[0.1...0.5] V Signal 1 (Accelerator pedal position:Kickdown):[4.3...4.8] V Signal 2 (Accelerator pedal position:Kickdown):[2.1...2.5] V 3. Test throttle body voltages with scan tool. Potentiometer #2 signal voltage ignition on, accelerator pedal position CTP 0.3-0.9 VDC, WOT > CTP value Potentiometer #1 signal voltage Ignition on, accelerator pedal position CTP 4.0-4.6 VDC, WOT < CTP value.
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