RE: [MBZ] What to use as test refrigerant on R-12 system
Hi Tom, Thanks for the reply. He bought the car last fall and the AC didn't work then - don't know when it was last functioning. The car is on its way to my house tonight, I should be able to put gauges on it and see what's going on. If there's more than a few PSI in the system, we may gamble on feeding it a pound or two of R-12 and hoping for the best... :-) -Dave M. -- Date: Thu, 7 Jul 2005 19:17:02 -0500 From: Tom Hargrave [EMAIL PROTECTED] Subject: RE: [MBZ] What to use as test refrigerant on R-12 system There is nothing that will mix will work as a refrigerant. Based on your tests, I'd say that your friend's system is low. There is no way of knowing how fast R12 will leak out without dumping a can in. One good sign is that fact that he has some refrigerant in his system. Has his AC been down for a while? More than a month? If so than he does not have a major leak and it's safe to dump in a can. If he had a major leak then you would not have any charge left by now. Thanks, Tom Hargrave
RE: [MBZ] What to use as test refrigerant on R-12 system
There is nothing that will mix will work as a refrigerant. Based on your tests, I'd say that your friend's system is low. There is no way of knowing how fast R12 will leak out without dumping a can in. One good sign is that fact that he has some refrigerant in his system. Has his AC been down for a while? More than a month? If so than he does not have a major leak and it's safe to dump in a can. If he had a major leak then you would not have any charge left by now. Thanks, Tom Hargrave 256-656-1924 www.kegkits.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave M. Sent: Monday, July 04, 2005 11:19 PM To: [EMAIL PROTECTED] Subject: [MBZ] What to use as test refrigerant on R-12 system Hi all, My friend has a W124 with no A/C. I pressed the schrader valve and there is still some pressure in the system, so it's not empty. I shorted the low pressure switch and the compressor runs, and there are bubbles (or something) visible in the sight glass. I did not have my manifold gauges with me to test pressures. I assume the system is low on R-12 at the moment. I hate to feed it precious R-12 just to have it leak out. I don't have a vacuum pump, so I really don't want to open the system. Is there anything I can feed in that will be compatible with R-12 (and cheap1), or am I stuck either taking the gamble (add R-12) or having to discharge, vacuum, and re-fill with a mineral-oil compatible replacement like Duracool, AutoFrost, or good 'ol R-12? He's on a tight (read: zero) budget but sure would like some cool air if possible. Suggestions welcome... :-) -- Dave M. Boise, ID 1994 E500 - 94kmi (Q-ship) 1987 300D - 256kmi (Sportline) ___ For used parts email [EMAIL PROTECTED] For new parts see www.buymbparts.com For repairs see www.oldworldauto.com To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
RE: [MBZ] What to use as test refrigerant on R-12 system
you can do this use any dry gas I used the key board cleaner because it is a refrigerant gas ( just not for mobile ..auto ... systems) what you do is add 3 or 4 cans to the system and check for leaks this is done first immediately by looking for the big obvious leaks than a few weeks later by looking closely for oil stains on the front or the condenser around hoses and at the Schrader Valves oil stains will appear as darker than the surrounding area areas to be looked at closely are condenser, back and front of the compressor ` and the Evaporator Coil ( on my car I can see the base of it near the gas pedal) .. look for oil leaks/ or stains when you discover them keep looking oh yeah DONT FORGET THE SCHARDER VALVE ( WHERE THE REFERDGERET GAS GOES IN ) THIS IS A LINK ON THIS PRODUCT AND ITS SAFTEY _http://householdproducts.nlm.nih.gov/cgi-bin/household/b_ (http://householdproducts.nlm.nih.gov/cgi-bin/household/b) do you have a leak detector? I found mine at a pawn shop for like 25.00 it is a snap on model 5500 made by tif and it works on r 12 only. the gas i used did trigger the leak detector form the small amount or 12 that was in the system ... go to it ...
Re: [MBZ] What to use as test refrigerant on R-12 system
safely discharge into the atmosphere and refill with $7 R134a cans from Autozone. The newer stuff has oils that don't eat the seals in old cars. That was the big stink with converting R12 cars to R134 -- you had to redo all the seals. shops charged a few hundred bucks for that. I have a receipt showing the PO of my old 83 300D paid $1300 to have someone retrofit the system. Now all you have to do is buy a $40 kit from Autozone and somehow evacuate the old system. (or maybe just discharge it) the pros use nitrogen to pressure test AC systems. - that according to my brother, an air conditioning professional. of course he works on ammonia systems with supply lines the size of radiator hoses. -Sealover On Thursday, July 7, 2005, at 08:17 PM, Tom Hargrave wrote: There is nothing that will mix will work as a refrigerant. Based on your tests, I'd say that your friend's system is low. There is no way of knowing how fast R12 will leak out without dumping a can in. One good sign is that fact that he has some refrigerant in his system. Has his AC been down for a while? More than a month? If so than he does not have a major leak and it's safe to dump in a can. If he had a major leak then you would not have any charge left by now. Thanks, Tom Hargrave 256-656-1924 www.kegkits.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave M. Sent: Monday, July 04, 2005 11:19 PM To: [EMAIL PROTECTED] Subject: [MBZ] What to use as test refrigerant on R-12 system Hi all, My friend has a W124 with no A/C. I pressed the schrader valve and there is still some pressure in the system, so it's not empty. I shorted the low pressure switch and the compressor runs, and there are bubbles (or something) visible in the sight glass. I did not have my manifold gauges with me to test pressures. I assume the system is low on R-12 at the moment. I hate to feed it precious R-12 just to have it leak out. I don't have a vacuum pump, so I really don't want to open the system. Is there anything I can feed in that will be compatible with R-12 (and cheap1), or am I stuck either taking the gamble (add R-12) or having to discharge, vacuum, and re-fill with a mineral-oil compatible replacement like Duracool, AutoFrost, or good 'ol R-12? He's on a tight (read: zero) budget but sure would like some cool air if possible. Suggestions welcome... :-) -- Dave M. Boise, ID 1994 E500 - 94kmi (Q-ship) 1987 300D - 256kmi (Sportline) ___ For used parts email [EMAIL PROTECTED] For new parts see www.buymbparts.com For repairs see www.oldworldauto.com To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net ___ For used parts email [EMAIL PROTECTED] For new parts see www.buymbparts.com For repairs see www.oldworldauto.com To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] What to use as test refrigerant on R-12 system
Checkout: http://duracoolky.com/ I've used their HC-22 product to top off industrial cooling units. So far, so good. I have not yet tried their HC-12a product. -Dave Walton On 7/5/05, Marshall Booth [EMAIL PROTECTED] wrote: Dave M. wrote: Hi all, My friend has a W124 with no A/C. I pressed the schrader valve and there is still some pressure in the system, so it's not empty. I shorted the low pressure switch and the compressor runs, and there are bubbles (or something) visible in the sight glass. I did not have my manifold gauges with me to test pressures. I assume the system is low on R-12 at the moment. I hate to feed it precious R-12 just to have it leak out. I don't have a vacuum pump, so I really don't want to open the system. Is there anything I can feed in that will be compatible with R-12 (and cheap1), or am I stuck either taking the gamble (add R-12) or having to discharge, vacuum, and re-fill with a mineral-oil compatible replacement like Duracool, AutoFrost, or good 'ol R-12? He's on a tight (read: zero) budget but sure would like some cool air if possible. Suggestions welcome... :-) If you come up with a good solution let me know too. I have the same problems (and only three precious cans of R-12). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0 159Kmi, '87 190D 2.5 turbo 234kmi Diesel Technical Advisor MBCA, member GWSection http://www.dhc.net/~pmhack/mercedes/mbooth1.htm ___ For used parts email [EMAIL PROTECTED] For new parts see www.buymbparts.com For repairs see www.oldworldauto.com To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] What to use as test refrigerant on R-12 system
Its the same as duracool, or is supposed to be. I have tried duracool but not the new name. The last batch of duracool I got must have been bad or something as it didnt work worth a darn. dave walton wrote: Checkout: http://duracoolky.com/ I've used their HC-22 product to top off industrial cooling units. So far, so good. I have not yet tried their HC-12a product. -Dave Walton On 7/5/05, Marshall Booth [EMAIL PROTECTED] wrote: Dave M. wrote: Hi all, My friend has a W124 with no A/C. I pressed the schrader valve and there is still some pressure in the system, so it's not empty. I shorted the low pressure switch and the compressor runs, and there are bubbles (or something) visible in the sight glass. I did not have my manifold gauges with me to test pressures. I assume the system is low on R-12 at the moment. I hate to feed it precious R-12 just to have it leak out. I don't have a vacuum pump, so I really don't want to open the system. Is there anything I can feed in that will be compatible with R-12 (and cheap1), or am I stuck either taking the gamble (add R-12) or having to discharge, vacuum, and re-fill with a mineral-oil compatible replacement like Duracool, AutoFrost, or good 'ol R-12? He's on a tight (read: zero) budget but sure would like some cool air if possible. Suggestions welcome... :-) If you come up with a good solution let me know too. I have the same problems (and only three precious cans of R-12). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0 159Kmi, '87 190D 2.5 turbo 234kmi Diesel Technical Advisor MBCA, member GWSection http://www.dhc.net/~pmhack/mercedes/mbooth1.htm ___ For used parts email [EMAIL PROTECTED] For new parts see www.buymbparts.com For repairs see www.oldworldauto.com To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net ___ For used parts email [EMAIL PROTECTED] For new parts see www.buymbparts.com For repairs see www.oldworldauto.com To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net -- Kaleb C. Striplin/Claremore, OK 89 560SEL, 87 300SDL, 87 300SDL, 85 380SE, 85 300D, 81 300TD, 81 240D, 81 240D, 76 240D, 76 300D, 74 240D, 69 250 Okie Benz Auto parts-email for used parts
Re: [MBZ] What to use as test refrigerant on R-12 system
Dave M. wrote: Hi all, My friend has a W124 with no A/C. I pressed the schrader valve and there is still some pressure in the system, so it's not empty. I shorted the low pressure switch and the compressor runs, and there are bubbles (or something) visible in the sight glass. I did not have my manifold gauges with me to test pressures. I assume the system is low on R-12 at the moment. I hate to feed it precious R-12 just to have it leak out. I don't have a vacuum pump, so I really don't want to open the system. Is there anything I can feed in that will be compatible with R-12 (and cheap1), or am I stuck either taking the gamble (add R-12) or having to discharge, vacuum, and re-fill with a mineral-oil compatible replacement like Duracool, AutoFrost, or good 'ol R-12? He's on a tight (read: zero) budget but sure would like some cool air if possible. Suggestions welcome... :-) If you come up with a good solution let me know too. I have the same problems (and only three precious cans of R-12). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0 159Kmi, '87 190D 2.5 turbo 234kmi Diesel Technical Advisor MBCA, member GWSection http://www.dhc.net/~pmhack/mercedes/mbooth1.htm
Re: [MBZ] What to use as test refrigerant on R-12 system
I'm certainly no expert, but I'd be inclined to wait until I could put some gauges on it, or even pay someone a few bucks to reliably tell me what kind of pressure the system's seeing. My recollection is that with R-12 you need to add enough to eliminate the bubbles. joe On 7/4/05, Dave M. [EMAIL PROTECTED] wrote: Hi all, My friend has a W124 with no A/C. I pressed the schrader valve and there is still some pressure in the system, so it's not empty. I shorted the low pressure switch and the compressor runs, and there are bubbles (or something) visible in the sight glass. I did not have my manifold gauges with me to test pressures. I assume the system is low on R-12 at the moment. I hate to feed it precious R-12 just to have it leak out. I don't have a vacuum pump, so I really don't want to open the system. Is there anything I can feed in that will be compatible with R-12 (and cheap1), or am I stuck either taking the gamble (add R-12) or having to discharge, vacuum, and re-fill with a mineral-oil compatible replacement like Duracool, AutoFrost, or good 'ol R-12? He's on a tight (read: zero) budget but sure would like some cool air if possible. Suggestions welcome...
Re: [MBZ] What to use as test refrigerant on R-12 system
I understand this problem what I did was to use a gas that I found out was a refrigerant it was of all things computer key board cleaner... I have a side can tap so it worked just like the r 12 I had a major leak and it was easy to find actually I needed to blow old oil and debris out of a system and this worked fine then I added oil , charged the system and let it run for 4 or five weeks when there was no pressure loss I was assured of a tite system I then evacuated the system and evacuated the system and added the correct refrigerant and it worked ( now I know there are going to be a lot of neg stuff said here ) this system still works fine both of them ! ) the reason I did not just was air was because I needed a DRY GAS and air has way too much moisture in it and also it is not condensable gas. actually any dry gas can be used to test for leaks mike collins 1985 500 sec
Re: [MBZ] What to use as test refrigerant on R-12 system
[EMAIL PROTECTED] wrote: I understand this problem what I did was to use a gas that I found out was a refrigerant it was of all things computer key board cleaner... Isn't that just regular old R134a?
