R12 to r134a refrigerant conversion. + R-134a charging hose & can tap valve.

I have the new fittings but it says that i have to change the receiver drier because it has to have a different type of desiccant in it i called technical support for 4 seasons to see whats in theirs and i was told that from factory the 1987s have a receiver Aug 22, 2015 · The oil used in R12 and R134a are different and not compatible. You should really change the compressor to one that is designed to be used with R134a. but be aware, this stuff is more flammable than R134, and you still have to convert the R12 fittings to 134. Below is a PDF of tables that show R12 to R134a refrigerant charge conversions in pounds and ounces: Apr 8, 2020 · R12 to R134A AC Retrofit Fitting Adapter Kit, R12 R22 to R134A High/Low Fitting Port Retrofit 1/4’’ to 7/16"-20 UNF Conversion Adapter, Fits for AC Air Conditioner Refrigerant $9. May 29, 2017 · Abesdub. 06-15-2004, 08:04 PM #7. From 1990 to 1993, the Z32's air conditioning system used the refrigerant called R12. Evacuate the system. 1) condensing coil, 2) expansion valve, 3) evaporator coil, 4) compressor. For the 1991 on model the instructions are slightly different. R134a won’t provide the same level of cooling as R12, though. As the owner or service provider of an R12 vapor cycle system, retrofitting the system to the new industry standard R134a refrigerant is the most Aug 4, 2022 · In this video I explain all the parts necessary to replace the old R12 ac system in a 1988-1993 chevy/gmc c/k series trucks. It's not as simple as adding R134a refrigerant. Inspect your vehicle's service manual for specific requirement on how much oil to add to the air -onditioning system. 9 * R12 charge (pounds)) - 0. 99 Get it as soon as Wednesday, Sep 13 Jan 18, 2022 · Evacuation – Using R134a equipment, evacuate the A/C system for a minimum of 40 minutes at the vacuum of -100kPa. Aug 9, 2003 · 240 posts · Joined 2001. Charging – Charge the A/C system with R134a to approx. Thus, I expected the system to take at least 40 oz of R134a. Mar 4, 2023 · Buy R12 to R134a Conversion Kit, R12 to R134a AC Retrofit Fitting Adapter Kit, High/Low Pressure R12 to R134a Retrofit Kit with 1/4'' Female to 7/16"-20 UNF Connection, for Auto A/C Refrigerant System-2: Air Conditioning Line Repair Tools - Amazon. My A/C compressor has gone out. With any of the above, replace or restore. I put a 134A type clutch cycling/pressure switch in. This video shows you how to convert your vehicle's A/C Apr 2, 2011 · 227 posts · Joined 2011. Includes three cans of High Mileage R-134a with Oil and How-To CD. Now in 1967 Ford installed the evaporator in an integrated heat/air assembly in the dash. I believe I have the York compressor. Jun 29, 2009 · Buy InterDynamics Certified A/C Pro Car Air Conditioner Adapter Kit, Complete AC Conversion Adapter Kit Converts R12 to R134-A Refrigerant, Includes 1 Low Side Port, 2 High Side Ports and Retrofit Label: Air Conditioning Line Repair Tools - Amazon. You will need a binder oil (ester oil) to use R134, or flush the entire system to use PAG oil. Connect a can of R134a lubricant to the yellow hose, open the low side valve and allow the vacuum in the system to draw the oil in. com or 254. Expect an AC shop to want to charge over $1000 to do the conversion. Feb 12, 2023 · R134a refrigerant is lighter than R12. jeffcolledge. com FREE DELIVERY possible on eligible purchases Jun 12, 2021 · R134a is the most commonly used refrigerant to convert automotive air conditioning away from the destructive R12. Their formula is: (R12 lbs x . original R12 1000 grams, R134a retrofit charge 900 grams. 3. This kit includes 2 fittings: •Low Side Elbow Adapter •High Side Adapter The low side adapter is provided with a elbow to allow you to service the system without interfering with the intake manifold. R134a Conversion Kits are identical to the R12 Kit except supplied with 134a compressor and proper hose fittings for system charging. So it should almost take the entire of the second can. There isn't a ratio of x-lbs of R134a to y-lbs of R12. Kit feature high quality R134a compatible components that will give better or equivalent cooling effects than the older R12 systems. They come in 12oz cans, so i would use about 2-2. 1987 - 1996 F150 & Larger F-Series Trucks - 1990 F150 AC 134a Conversion - I am a new member that is converting my 1991 F150 AC system from R12 to 134A. Jun 4, 2013 · 1992 Pickup A/C conversion from R12 to 134a. now i have no idea what is still working and what is bad so i don't Aug 11, 2019 · You can get R12 replacements, or just compressed duster air cans, some of which are HFC-134a (so, R134a by a different name), while others are R152A. 99/Count) List: $16. Several internet sources give this formula for conversion R134a charge (pounds) = (0. 5) ounce increments - charge the system to the next highest quantity of R134a. Note: Hot gas valve will need to be adjusted during the charging process to properly adjust the low side by-pass pressure to 20psi. The R12 hoses do leak out 134a. I have a 1970 Mustang convertible with factory A/C. 99 $ 9 . com FREE DELIVERY possible on eligible purchases Jun 13, 2004 · Hot shot r-414B is the best replacement for r-12 I've used. 49 $ 9 . Collect and redeem Canadian Tire Money, faster, at more places you love. This works when the R12 charge specification is listed in pounds. Oct 12, 2022 · The typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount. Warning/Identification Labels – Remove all labels from the vehicle Reward yourself with Triangle®. g. Includes Required Retrofit Label. This kit is designed to convert the fittings in your R12 AC system to R134 in order to be able to charge your system. com; Skype. Your system has the original R12 fittings on it, so it hasn't been converted to R134a. To ensure the right charge, you must fill the new system with between 75 and 85% of the factory-set capacity for optimal cooling. 1979 Monte Carlo with a 400hp+ 350ci. If you have questions about converting your classic ride’s air conditioning system from R12 to R134a, feel free to contact Classic Auto Air for more information. Charge with 134a between 70-80% of the original R12 charge amount. As R12 used a different oil that was not fit to be used with R134a, the replacement was not that simple. The system with R134A cools pretty good - I get 38 degrees F at the vents. 55 lbs. RED TEK Low Side Adapter is a retrofit adapter for converting an R12 fitting to an R134a fitting. works great on ge refrigerators, cars etc. To draw the refrigerant from the can, connect the blue hose to the low side port and open the system. If the system needed major AC component replacement I would. 9 or 90% to determine the refrigerant capacity. Recommended: Install hi/lo pressure switch. Dec 11, 2013 · Add a few ounces of new oil (if any part of the system had R12 with mineral oil in it, use Ester oil. An E30 R-12 system has a tube and fin type condenser, as most R-12 systems. 37 MiB) Downloaded 1542 times. Jun 20, 2007 · Add the proper oil to the compressor. Safety Information. Plus, R134a has a lower tolerance for over/under charging. It's also worth noting that the 134a system runs at a higher pressure than a r12 system and in some cases the hoses need to be changed with barrier hose . i have a 1992 toyota pickup and the a/c has been out for about 8 years. The system has R-12 in it. There, we will learn what are the essential parts of these kits and how to carry out this procedure. Now below are some practical steps to convert R-12 to R-134a system. cans) to replace lost refrigerant. + R-134a charging hose & can tap valve. 75 (R12 charge x . Send POA Valve in to be calibrated. The system was vacuumed for 30 mins and filled correctly with R134. Replace any O-rings with 134a compatible. 9 5 speed. Both tend to be cheaper than R134a sold for refrigerant purposes, and any of those will be cheaper than R12. Lets Talk Chemicals-R134a: Industry name for 1,1,1,2-Tetrafluoroethane, a fluorocarbon aerosol and refrigerant. you can use a pressure chart from one of the newer civics to determine when your system is fully charged. R12 to R134a Refrigerant Charge Conversion Charts. use 80% to volume or if you would normally use 10 oz of r-12 use 8 oz r-414b and you don't have to worry about oil compatability. It’s possible to convert from R12 to R134a without replacing the system’s components, so when R134a was brought out, it seems to be a good match to many automotive air conditioning issues. R134a retrofit capacity chart Nov 3, 2010 · R12 to R134a conversion. converts to an R134a charge level of 1. Although the original condenser will work, we Jun 29, 2009 · R12 to R134A Adapter, R12 R22 to R134A High/Low Fitting Port Retrofit 1/4’’ to 7/16"-20 UNF Conversion Adapter, Fits for AC Air Conditioner Refrigerant $9. Due to environmental concerns, the EPA declared "And low, thou shalt not sell vehicles with R12 A/C systems. May 17, 2018 · Received 184 Likes on 140 Posts. Apr 25, 2012 · To make it short, R-134a has different chemical and physical properties than R-12. When you're down place the sticker on the vehicle and you now have a legally converted R134a system. Flush/clean any existing parts such as the The R134a conversion seems to work better than both the R12 and R134a factory systems. 25) or ½ (. The one issue with r12 that they said was if there was a leak within 2 weeks, to bring it back to check it out. Refrigerant Type: R12: Buyer's Guide. Determine the amount of R-134a refrigerant needed to charge the system by subtracting 50 ml (1-2/3 oz) from the system's R-12 capacity. Brand. Now take the car back to the person who evacuated the R12 and have them pull a vacuum on the system for at least half and hour. Aug 20, 2003 · Additional information on interdynamics conversion kit. Skip this step if the refrigerant you are adding contains oil. Yeah, California just switched from 134a to 134ca, which is the same thing, except instead of the puncture top, they are now self sealing tops, which require a special adapter which costs another $6, then you have an additional $10 core charge for each can, so that the state can reclaim the 8-10% The Kuehl 928 R134a Conversion Kits include everything you need to convert your Porsche’s AC system form R12 to R134a refrigerant. Converting to R134 is less harmful for the environment. Specifications. These systems use compression flare fittings at all the joints so there are no O rings to replace. 49 Get it as soon as Thursday, May 23 Jun 10, 2008 · 2. ----If this video was hel Jul 8, 2012 · The proper way is to have the proper equipment. ♥ WIDE COMPATIBILITY - Charging port adapter R12 R22 Port to accept R134a Quick Disconnect. R12 is still on the shelf but you need the cert to buy and they cost $35. It is used on vehicle A/C systems 1992 and older. A good starting point for charging 134a on your freshly converted system is typically about 70% of the original R12 charge, and the final charge amount will be no more than 80%. Apr 12, 2015 · Also, because R134a is a smaller molecule that R12, it is more likely to leak out of the system than R12. With the r134 they wouldn't charge me again. If the system is still in tact, there will still be oil in it. I suggest finding a shop that won't charge too much to reclaim the R-12 from the system and suck it down into a vacuum. So for the cost of the kit and the 134a is the cost of 1 can of r12. To discover the capacity for refrigerant, you want to use the specs for the current system and multiply the R12 charge by 0. To charge it: Connect to the LOW SIDE ONLY. But they would have to charge me to evac and replace the r12. Kit are available Jun 20, 2021 · R12 to R134a Charge Conversion Formula (pounds only) A charge level between 75% and 85% is recommended when converting from R12 to R134a refrigerant. Install kits can be purchased at aftermarket Feb 1, 2021 · Learn the steps to retrofit your pre-1995 vehicle's A/C system from R-12 to R-134a refrigerant, and why this conversion is necessary for environmental reasons. Part # MT2164. Drain the compressor oil and recharge with a full charge of R134a compatible oil such as PAG or Ester Oil. The R12 to R134a Charge Conversion Formula When converting from R12 to R134a refrigerant, it is suggested to maintain a charge level between 75% and 85%. May 11, 2023 · Remove the harmful R12 and refit your system with the R12 to R134a conversion, which we will discuss in more detail later in the article. 93 GT, every part of the ac system is new, bought the car this way. You will only need to put 70-80% of the recommended r12 amount with 134 a . Scales that measure only in ¼ (. Aug 8, 2003 · Empty the 12 from the system. 7420. Add to cart. The R12 system on the Grand National was a 3. com FREE DELIVERY possible on eligible purchases . R12 refrigerant Step 5. when the a/c went out it had a leak somewhere but everything was working at that time. i am finally going to try and get it working again and convert it to 134a. Classic Auto Air is your source for Model Specific A/C kits for 80’s & older Ford, GM R12 to 134A Conversion Chart. 25 pounds. Apr 9, 2012 · Toyota says for a retrofit to charge 650g or 22. Manufacturer Part Number VA-LH11. consider converting to R134 but some articles mention that to. #8 · Apr 3, 2011. I bought a manifold set and A/C system flush kit off Amazon Oct 12, 2022 · Drain the compressor oil and recharge with 134a-compatible oil. A parallel flow condenser is required for R-134a because it can dissipate May 29, 2012 · Here is how the refrigerant charge for 134a is determined: When an R-12 system is retrofitted to 134a, the general rule of thumb is that the refrigerant capacity/charge should be reduced to 80-90 % of the original capacity. Below is a PDF of tables that show R12 to R134a refrigerant charge conversions in pounds and ounces: Jun 9, 2012 · Last I remembered, when they were phasing out R-12 the scuttlebut referred to needing to replace the condenser coil, accumulator, the refrigerant metering device, oriface, and the rings, R134a condenses from a vapor to a liquid at a much higher psi than R-12 thus the thicker condenser coil, If you can get your hands on MP-39 it is a drop in replacement refrigerant that I use often and works Oct 12, 2022 · Assuming the compressor is in good shape, the owner of this 1965 Mustang can convert from R12 to R134a. Jun 23, 2012 · Even with R134a, you will need the newer hoses designed for R134a. May 13, 2014 · Fox A/C R134 conversion. Apr 5, 2020 · The only mechanical differences between an R12 system and an R134a system are that R134a systems mostly have larger condensers and are more strong compressors. It will be hard to judge the charge using the sight glass method as its normal to see a few bubbles when using R-134a. Low side readings 43 psi at idle Hi side readings 150 psi at idle Off idle, say around 1200 rpm, Low side 34 psi Hi side 160 psi Nov 22, 2022 · To convert your car’s AC R12 system to R134a, only a few changes are needed, such as making the pressure ports, receiver drier, and pressure switches compatible with R-134a. 43lbs of R-134a. Converting AC from R12 to R134 240 1975 to 1990. If all parts were originally R134a, you can use PAG 46 oil) Add the rest of the oil to the new accumulator. You may need to add or subtract a little More cost effective than R12; Converting to R134 is less harmful for the environment; Compatible with all newer compressions; Converting To R134 Is Less Harmful For The Environment Jun 29, 2009 · R12 to R134a Conversion Kit, R12 to R134A Convert Adapters, Convert R12 R22 to R134a, AC Retrofit Fitting Adapter Kit, High/Low Fitting Port Retrofit 1/4 SAE to 7/16"-20 UNF Conversion Adapter dummy AutoWanderer Tool R1234yf Quick Couplers Kit R1234YF to R134a Conversion Adapters for R1234yf Air Conditioning Systems Evacuation Recharging This indicates that an R12 charge level of 2 lbs. Vent temps are about 60 degrees, which sucks of course. First, you have to evacuate the system of R12. 06:21 PM. and add R12 until the pressures read correctly for the ambiant temperature. Replace the drier. Subtract ¼ or 0. VMRS Code. Install all the other components, install the adaptor fittings on the service ports. 25 lb. total fill (three 12 oz. = R134a Charge Apr 5, 2018 · R134A Conversion. Flush system with acetone. Don’t worry if you go over a little the general rule is 80-90% of the original R-12 charge. Sep 22, 2014 · 09:05 AM. Shop All Santech. Our kits start with basic conversions: ester oil, R134a charge port adapters, HNBR o-rings, R134a conversion sticker Jun 12, 2008 · Or $168 for r134a converted. Information. + Low and high service port adapters with color coded protective caps. You might find that the system doesn’t get as cool even after properly charging it. The original GM spec for these trucks was 56 ounces of R-12. These charts show the conversion values from the original R12 charge to the new R134a charge. 4 Pack R12/R22 to R134a Adapter Conversion Kit High/Low AC Retrofit Fitting Adapter 1/4'' to 7/16"-20 and 40 Pcs Dust Cap Coupler Connection for Car AC Air Conditioner Refrigerant (Gold) $1599 ($15. Jul 4, 2003 · Connect the R-134a recovery/recycling station to the system. Santech R12 to R-134a Coupler Conversion Kit. 9 pounds or 30 ounces. If it is still cooling, I would use some gauges to measure the pressures. Oct 13, 2012 · Apologies for the delay in replying but I couldn't find this immediately. Apr 27, 2015 · Location: Youngstown Ohio. 90% of the original R12 charge quantity e. In 1996 systems were switched over to R134a from R12 refrigerant. i have a 1987 f150 i have to convert the ac to r134a. May 17, 2023 · Buy R12 to R134a Conversion Kit, 2 Pair R12 to R134a Convert Adapters, R12 to R134A AC Retrofit Fitting Adapter Kit, R12 to R134a Adapter Fittings, Fits for Car AC Air Conditioner Refrigerant System: Air Conditioning Line Repair Tools - Amazon. EXAMPLE: Chart Reads Jun 2, 2023 · Buy R12 to R134a Conversion Kit, 1Pair R12 to R134a Convert Adapters, R12 to R134A AC Retrofit Fitting Adapter Kit, R12 to R134a Adapter Fittings, Fits for Car AC Air Conditioner Refrigerant System: Air Conditioning Line Repair Tools - Amazon. The stock POA valve was left in place. 25 pounds from this number. If the new one has a sight glass, it'll be useless after the conversion, and the milky appearance is normal. com FREE DELIVERY possible on eligible purchases Jul 6, 2012 · The A/C system in many older vehicles needs to be converted from R12 refrigerant to R134a refrigerant. Older compressors have a tendency to fail when subjected to this increased pressure. pdf. Includes: 8 Oz Ester Oil, All O-rings, Springs, Sealingwashers And Adapters Required To Complete a Retrofit For Most Compressors. May 26, 2017 · Converting from r12 to r134a. #5 · Jun 1, 2017. com FREE DELIVERY possible on eligible purchases Mar 8, 2010 · R12 and R134 oil is not compatible with each other. Oct 28, 2004 · R134a as the only substitute for R12 refrigerant that GM recommends. Returns; R12 to 134A Conversion Sep 9, 2023 · Original compressor had a tag showing charge of R-12 of 2. Therefore, it’s essential to select a compressor that is compatible with R134a to ensure that the system’s performance is maintained. R-134a operates at higher pressures than R12. Add 120 ml of PAG oil (included in the kit) to the system. 99. Install 134a charge port adapters. Second, have the proper fittings for the low side and high side. In fact, you’ll DECREASE AC performance by adding too much R134a refrigerant. 1-813-259-7688; 1-813-254-7419; 1-813-259-7688; support@originalair. R134a is a hydrofluorocarbon (HFC) refrigerant that replaced chlorofluorocarbon (CFC) refrigerants like R12 and is now the standard refrigerant used in most automotive air conditioning systems. Contacts. I replaced the old R12 compressor with a gen3 R-134a compressor, new receiver/drier, new expansion valve, flushed condenser and evaporator with acetone to rid of most old mineral oil and filled with Mar 20, 2019 · Buy Aupoko R12 R22 to R134a Adapters, R134A Refrigerant Tank/Vacuum Pump Port Connection Adapters - 1/4" Flare Female x 1/2" Male - Refrigeration Handling Charging Tool: Air Conditioning Line Repair Tools - Amazon. Replace the receiver-drier with one that is designed for R134a systems (contains XH-7 or XH-9 type desiccant). 5 cans. When converting an R12 system to 134a, charging amounts vary from system to system. Drain the compressor oil and recharge with 134a compatible oil. Somewhere down the line it developed a leak in one of the compressor seals and it is now making a grinding noise when the A/C clutch is engaged. Jun 14, 2006 · R-134a requires about 80% of the amount of R-12, so if you're charging with R-134a, you would use 23-27oz of refrigerant. Key components include special R134a compatible hoses and compressor to minimize recurring maintenance and system service. In cases where no conversion information is available, a simple formula can be used to compute the difference in charge level (charge specification in pounds). R-134a Ester Oil Charge with O-Ring Conditioner. 38 pounds. 9) - . This indicates that an R12 charge level of 2 lbs. Third, add the same amount of R134 oil that was evacuated from the R12 system. I converted my 1966 convertilbe with V8 and air conditioning to R134a in 1998. 25 lb (52 oz) system. RRGrassi--1990 D250 5. So the steps involved are cleaning out the old oil, replacing all the O-rings, replacing the dryer, replacing the expansion valve, and converting the high and low side connectors from Schrader to quick connect valves. Apr 25, 2019 · About this item . Remove the old R12 fittings and install the new R134 fittings. It definitely is worth the conversion over to R-134a, the lowest it drops in temp is 45*F. You'll need to charge the system the old fashioned way. Change or restore the filter-drier. If no conversion information is provided, there is an easy formula to calculate the difference in charge level. Here are the steps to take to make sure the converted AC system gets nice and cold. May 4, 2022 · The shop that did the conversion leak tested the sytem, replaced O-rings, flushed out the old oil, replacing it with a type compatible with R134A and the receiver-dryer was also replaced. (3. It's normal for the cooling to be slightly less effective after the conversion. The 134a hoses are barrier type to prevent this. Tighten all the connections and add the new fittings. (PAG or Ester Oil) Replace or restore all rubber hoses with barrier hose. Sep 2, 2016 · Replied by Spencer on topic 1988 928S4 - Should I convert AC from R12 to R134A?? The reason 134 does run a little warmer than the r12, still it should be plenty cold enough, is the actual compressor engaging listen for the click, if not check compressor ,if it does click is it fast or slow fast clicks low freon slow long clicks possible hi low Oct 4, 2021 · A short video covering tips for retrofitting older A/C systems to R134a. Santech 952402. NAPA. 99) and follow the instructions. Oct 5, 2018 · This video covers the basics on R12 to R134a conversion, as well as some things to consider before and while converting your system. I can further go into more detai Murray retrofit kits and components are designed to upgrade R12 A/C systems to R134a and are compatible with nearly all compressor types. That’s just the opposite of R12. Apr 26, 2018 · R134a doesn’t cool as efficiently as R12, so even when properly charged your system won’t cool as well. RED TEK Low Side Adapter allows for quick and easy retrofit of R12 refri. #8 · Aug 9, 2003. Jeep FSM states 135 ml oil should be in the Jun 3, 2024 · After vacuuming, close the low-pressure service port and proceed with charging the AC system with R134a refrigerant according to the manufacturer’s instructions. Designed For R12 To R134A Conversion. Jump the clutch to activate it and charge that way. 928oz or 1. (PAG or Ester Oil) Replace or restore all rubber hoses with a barrier hose. Reply. Oct 25, 2022 · R12 Freon has gone out of production, hybrid blends of Freon have been rejected by OEMs and compressor manufacturers, and certifying exotic blends will likely also become an unfriendly FAA issue. 1277 posts · Joined 2016. " So all the car manufacturers, Nissan included, made tweaks to their cars to use the more environmentally-friendly R134A. Go down to autozone and by the R134a conversion kit (34. I had my R12 freon removed and after I change the parts (there's instructions in the kit) I have a vacuum pump and gauges to draw a vacuum and recharge with R134. Jun 14, 2009 · Found the conversion kit with the fittings and the neutralizer oil for $20 and cans of 134a for $5. 9 Cummins Getrag 5 speed. Depending on how bad the leak is you may want to spring for a R12 recharge each spring. May 18, 2011 · About $450 in parts. 751. The conversion is determined by multiplying the R12 charge value by . I don't know if the kits are still available but this covers the procedure for cars from 1975 to 1990. 9 or 90%. Sealing Washers Using the specs for the current system, multiply the R12 charge by 0. Kit contains: + 8 1/2 oz. To "compensate" for this, R-134a systems have a different type of condenser, components, and operating pressures. 6. I hope it goes well. Posted April 27, 2015. '91 Mercedes 300D '06 VW Jetta BRM TDI 1. 7. + SAE spec retrofit label. R12 is going to be extinct in a few more years and I converted my 86 F-150 to R134A for less than cost of a few cans of R12 around here. R134a removes a higher heat load from the interior, so it is extremely important for the fan clutch and condenser to be in excellent condition on any 134a conversion. Be sure to use proper fittings and s Oct 13, 2010 · All-in-one solution – no additional tools required, 36 oz. Jun 8, 2011 · The most important thing when converting to 134, is that you MUST make sure to put the system into a complete vacuum (30"Hg) to burn off the moisture and residue from the old r-12. I changed out everything, but the evaporator core, which I flushed. R-134a is lighter and so less R-134a refrigerant is required. New Compressor Conversion Retrofit Component Refrigerant Compatibility: R134a. May 2, 2012 · R12, the AC works best with R12. Probably because it's much cheaper for them to get. Fluids and Chemicals A/C Charging and Refrigerant A/C Manifold Gauge Set and Components. From this number, subtract 1/4, or 0. Retrofit adapters are compatible with R134a refrigerant and charging manifolds, and are precision-manufactured for application-specific fit and accuracy. 75 = R134a charge). Finally you add the correct amount of refrigerant by weight and add the label. I've used this method to charge with R290, Envirosafe, and R134a. R12 to R134a Conversion Now in order to abide by the law, the cars manufactured before 1995 needed to have a refrigerant conversion from R12 to R134a, which also led to further complexities. Jun 3, 2009 · There is a chance the switch is bad, but you need to know the actual static pressure of the system to tell. Engine is a 351C. The three major kinds of refrigerant oil: Mineral oil for R12 systems (left), PAG oil for R134a systems (center), and ester oil for either Rob Siegel. To learn more about the differences between the two, read R12 vs R134a in our AC Help section. You can look up the tables for the pressures for those, but I’m going with R134a here. All I did was replace: All the O-rings, Accumulator, Orifice tube/expansion valve. Murray retrofit kits and components are designed to upgrade R12 A/C systems to R134a and are compatible with nearly all compressor types. It has to do with the size of the 134a molecule vs R12. Retrofitting AC systems is something that has been done for many years now. By following these steps and installing the retrofit kit properly, you can convert your car’s AC R12 system to R134a smoothly and effectively. Contents. Compatible with all newer compressions. The general rule of thumb is that the system should take about 80-85% of the R12 number in R134a refrigerant. Mar 17, 2016 · You'll need a box fan, R134a manifold gauge set, charge hose, vacuum pump, vent temp thermometers, and at least one decent infrared thermometer to charge it properly. Contact Us. Apr 9, 2008 · R134a systems use less refrigerant and more oil as compared to R12. Evacuate the system and check for leaks, and recharge. Recharge the system with about 15% less R134a than the R12 specification. It replaced R12 in the early 90s because it is less likely to bind to ozone and degrade the ozone layer of the atmosphere. Contact us at Sales@ConversionAirKits. Find out what tools and materials you'll need, and how to check your system for leaks and proper operation. FREE delivery Wed, Jun 19 on $35 of items shipped by Amazon. May 7, 2018 · The advantage of ester oil is that it works with both R12 as well as R134a, so you can fill the system with it and then use either refrigerant. If the static pressure is below ~45psi, the switch will open and keep the compressor from engaging. Replace any o-rings with 134a compatible. The receiver/dryer should be replaced. 25 (pounds) So R-134a charge is 1. This is mainly because R134a doesn’t cool down as well and quickly and needs a larger space to dissipate heat and is charged to higher pressures. These Low/High side retrofits/adapters/fittings will convert your old 1/4" SAE or 7/16’’- 20UNF R12 R22 charging port and make it accept the R134a quick disconnect hose. Easy to use kit, includes everything needed to recharge an automotive A/C system or retrofit from R-12 to R-134a. While the formula above is helpful, you might be strapped for time and need an answer quickly. oa ia ja jm dc pv ok fk rj vu