Re: [MBZ] I buy a new AC machine, now have AC problems
Sounds like normal GM design then. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
I think it is the line going into the evap, and it is skinny, I will say that. When I was doing the system I thought it was going to be in the evap, but it was not there. Peter Frederick wrote: Being the nutcase that I am, I suspect that's a flow control orifice for equalizing the flow to the rear evaporator -- check the inlet of the evaporator for a (plugged) orifice tube. It's possible that the orifice tube is up there, but then the line going tot he evaporator is going to have to be really skinny to prevent boiling the freon. There HAS to be an expansion point in the evaporator, or you won't get cooling Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3017 - Release Date: 07/20/10 01:36:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Being the nutcase that I am, I suspect that's a flow control orifice for equalizing the flow to the rear evaporator -- check the inlet of the evaporator for a (plugged) orifice tube. It's possible that the orifice tube is up there, but then the line going tot he evaporator is going to have to be really skinny to prevent boiling the freon. There HAS to be an expansion point in the evaporator, or you won't get cooling Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
The tube on this vehicle is in the small pipe up front behind the right headlight. Easy to get to. Peter Frederick wrote: The orifice tube is in the inlet of the evaporator. The accumulator, which catches the excess liquid freon, is probably up front. Orifice tube systems flood the evaporator under some conditions, so there must be a tank to catch the liquid rather than slug it into the compressor. Freeze protection is provided by a pressure switch on the accumulator, which also acts as a low pressure safety switch. To change the orifice tube, you must remove the inlet line at the evaporator, the tube will be an insert. A real PITA to remove, too. I agree, you should check the oil in the system. Usually the best way is to remove and empty the compressor, then refill with the correct amount. Peter -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
No, there is no way for any oil to be in the tank.. When you do a recovery, after its done there is a drain at the bottom to drain the oil out, then you can add back in what you need to. MG wrote: Could the machine possibly have a lot of oil in the tank and somehow added a lot of oil into the system with the freon? Don't know enough about these machines to know if this is possible. If that is possible though then even charging with cans now may not change anything. Manfred Date: Tue, 20 Jul 2010 00:31:23 -0500 From: "Kaleb C. Striplin" To: Mercedes Discussion List Subject: Re: [MBZ] I buy a new AC machine, now have AC problems I might try charging from cans first, and if it still does not work I will recover that and then pull the system apart and see whats up. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3017 - Release Date: 07/20/10 01:36:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
The orifice tube is in the inlet of the evaporator. The accumulator, which catches the excess liquid freon, is probably up front. Orifice tube systems flood the evaporator under some conditions, so there must be a tank to catch the liquid rather than slug it into the compressor. Freeze protection is provided by a pressure switch on the accumulator, which also acts as a low pressure safety switch. To change the orifice tube, you must remove the inlet line at the evaporator, the tube will be an insert. A real PITA to remove, too. I agree, you should check the oil in the system. Usually the best way is to remove and empty the compressor, then refill with the correct amount. Peter -Original Message- >From: MG >Sent: Jul 20, 2010 8:44 AM >To: Mercedes Discussion List >Subject: Re: [MBZ] I buy a new AC machine, now have AC problems > >Could the machine possibly have a lot of oil in the tank and >somehow added a lot of oil into the system with the freon? Don't >know enough about these machines to know if this is possible. If >that is possible though then even charging with cans now may not >change anything. > >Manfred > > > >Date: Tue, 20 Jul 2010 00:31:23 -0500 >From: "Kaleb C. Striplin" >To: Mercedes Discussion List >Subject: Re: [MBZ] I buy a new AC machine, now have AC problems > >I might try charging from cans first, and if it still does not work I >will recover that and then pull the system apart and see whats up. > > >___ >http://www.okiebenz.com >For new and used parts go to www.okiebenz.com >To search list archives http://www.okiebenz.com/archive/ > >To Unsubscribe or change delivery options go to: >http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Could the machine possibly have a lot of oil in the tank and somehow added a lot of oil into the system with the freon? Don't know enough about these machines to know if this is possible. If that is possible though then even charging with cans now may not change anything. Manfred Date: Tue, 20 Jul 2010 00:31:23 -0500 From: "Kaleb C. Striplin" To: Mercedes Discussion List Subject: Re: [MBZ] I buy a new AC machine, now have AC problems I might try charging from cans first, and if it still does not work I will recover that and then pull the system apart and see whats up. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
I checked and I did not see anything obvious as far as temp difference. The orifice tube is in fact behind the right parking light area. Brian Toscano wrote: Did you notice temperature differences across the various parts which may help show a blockage? My Subaru had a problem with no cooling but it had what seemed to be enough charge. I can't remember what the gauges read. A pressure test, vacuum and recharge got it back cooling with no other changes which made me think expansion valve. Later it was determined to be freezing up and a TSB showed how to relocate an evaporator temperature sensor to reduce/eliminate the problem. In that condition low pressure was very low (10 psi) but the system never cut off since there is no low, low pressure cut out. Is the orifice tube behind the front right parking light? Regards, -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Did you notice temperature differences across the various parts which may help show a blockage? My Subaru had a problem with no cooling but it had what seemed to be enough charge. I can't remember what the gauges read. A pressure test, vacuum and recharge got it back cooling with no other changes which made me think expansion valve. Later it was determined to be freezing up and a TSB showed how to relocate an evaporator temperature sensor to reduce/eliminate the problem. In that condition low pressure was very low (10 psi) but the system never cut off since there is no low, low pressure cut out. Is the orifice tube behind the front right parking light? Regards, -Original Message- From: "Kaleb C. Striplin" Sender: mercedes-boun...@okiebenz.com Date: Sun, 18 Jul 2010 21:33:11 To: Mercedes Discussion List Reply-To: Mercedes Discussion List Subject: Re: [MBZ] I buy a new AC machine, now have AC problems guy owns a body shop and his supplier had a special on new machines, he did not need the dual machine anymore. If the scale is off, it is easily calibrated. I still think its something with the truck though. I messed with that thing all day, I first charged in 4 lbs, it did pretty much the same thing, high side would get over 450 or so and compressor would cut off. I recovered that, put in 3.25 lbs, same thing. I recovered it again and thats the current state. Im going to pull it apart next weekend and mess with it. OK Don wrote: > The machine's calibration could be off also - why was it sold? > > On Sun, Jul 18, 2010 at 3:32 PM, Kaleb C. Striplin wrote: > > >> the whole point of these machines is if its low, you dont know how much is >> in there so you recover the refrigerant, program how much its supposed to >> have and it does the rest. I suppose its possible the machine put in more >> than it said. If it came down to it I could start it at say 3lbs, then put >> in a little more at a time. >> >> > > > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 > 01:35:00 > > -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
I might try charging from cans first, and if it still does not work I will recover that and then pull the system apart and see whats up. Peter Frederick wrote: You only need to have the engine running if charging from cans, as it's impossible to drive the freon in with a can and a hose, you have to use the compressor to get it into the system. From a large can or with a pump on a recovery system, you can push liquid in by weight, no need to have the compressor running. Kaleb: Verify that you are charging in lbs and not kg.. If you are stalling out the compressor, it sounds to me as if you have a totally liquid filled high side, which would not surprise me if you are charging 2.2 times as much as you think you are! It might be better to charge from cans in this case, or at least with the engine running and the gauge set installed so you can watch the pressures. At 1500 rpm, all fans going full blast, and the windows open, you should get 40 or so lbs pressure low side (35F on the scale, whatever the pressure required to get it) and 350-375 high side, maybe a bit more if its like 95 outside. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3014 - Release Date: 07/18/10 13:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
The machine pumps it in, then you start it and check everything out. If for some reason all the refrigerant does not go in, you start the car to suck the rest in. Allan Streib wrote: Whenever I've had my cars charged at a local shop they use a machine and they have the car running... maybe there are different kinds of machines? "Kaleb C. Striplin" writes: no, not when using a machine. Allan Streib wrote: "Kaleb C. Striplin" writes: I then set the machine to charge in 4.25 lbs, which it does just fine. After charged I start the truck and turn on the AC. I always thought you were supposed to charge with the car and AC running. Allan No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3014 - Release Date: 07/18/10 13:35:00 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3014 - Release Date: 07/18/10 13:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
You only need to have the engine running if charging from cans, as it's impossible to drive the freon in with a can and a hose, you have to use the compressor to get it into the system. From a large can or with a pump on a recovery system, you can push liquid in by weight, no need to have the compressor running. Kaleb: Verify that you are charging in lbs and not kg.. If you are stalling out the compressor, it sounds to me as if you have a totally liquid filled high side, which would not surprise me if you are charging 2.2 times as much as you think you are! It might be better to charge from cans in this case, or at least with the engine running and the gauge set installed so you can watch the pressures. At 1500 rpm, all fans going full blast, and the windows open, you should get 40 or so lbs pressure low side (35F on the scale, whatever the pressure required to get it) and 350-375 high side, maybe a bit more if its like 95 outside. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Whenever I've had my cars charged at a local shop they use a machine and they have the car running... maybe there are different kinds of machines? "Kaleb C. Striplin" writes: > no, not when using a machine. > > Allan Streib wrote: >> "Kaleb C. Striplin" writes: >> >> >>> I then set the machine to charge in 4.25 lbs, which it does just fine. >>> After charged I start the truck and turn on the AC. >>> >> >> I always thought you were supposed to charge with the car and AC >> running. >> >> Allan >> >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: >> 271.1.1/3014 - Release Date: 07/18/10 13:35:00 >> >> -- 1983 300D ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
no, not when using a machine. Allan Streib wrote: "Kaleb C. Striplin" writes: I then set the machine to charge in 4.25 lbs, which it does just fine. After charged I start the truck and turn on the AC. I always thought you were supposed to charge with the car and AC running. Allan No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3014 - Release Date: 07/18/10 13:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
"Kaleb C. Striplin" writes: > I then set the machine to charge in 4.25 lbs, which it does just fine. > After charged I start the truck and turn on the AC. I always thought you were supposed to charge with the car and AC running. Allan -- 1983 300D ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
I tend to test by putting in just enough to engage the pressure switch. On my 85 that was a good idea since I quickly noticed the high side was too high and the low side was ... low. I observed foam in the sight glass (the color of the oil!) and that the line going into the side of the accumulator was much hotter (30 degrees) than the one at the top. I have a new one going in tomorrow. -- John W Reames jwrea...@comcast.net Home: +14106646986 Mobile: +14437915905 On Jul 18, 2010, at 22:33, "Kaleb C. Striplin" wrote: > guy owns a body shop and his supplier had a special on new machines, he did > not need the dual machine anymore. If the scale is off, it is easily > calibrated. > I still think its something with the truck though. I messed with that thing > all day, I first charged in 4 lbs, it did pretty much the same thing, high > side would get over 450 or so and compressor would cut off. I recovered > that, put in 3.25 lbs, same thing. I recovered it again and thats the > current state. Im going to pull it apart next weekend and mess with it. > > OK Don wrote: >> The machine's calibration could be off also - why was it sold? >> >> On Sun, Jul 18, 2010 at 3:32 PM, Kaleb C. Striplin wrote: >> >> >>> the whole point of these machines is if its low, you dont know how much is >>> in there so you recover the refrigerant, program how much its supposed to >>> have and it does the rest. I suppose its possible the machine put in more >>> than it said. If it came down to it I could start it at say 3lbs, then put >>> in a little more at a time. >>> >>> >> >> >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 >> - Release Date: 07/18/10 01:35:00 >> >> > > -- > Kaleb C. Striplin/Claremore, OK > 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 > 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro > manny, 76 240D, 76 300D, http://www.okiebenz.com > > ___ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
guy owns a body shop and his supplier had a special on new machines, he did not need the dual machine anymore. If the scale is off, it is easily calibrated. I still think its something with the truck though. I messed with that thing all day, I first charged in 4 lbs, it did pretty much the same thing, high side would get over 450 or so and compressor would cut off. I recovered that, put in 3.25 lbs, same thing. I recovered it again and thats the current state. Im going to pull it apart next weekend and mess with it. OK Don wrote: The machine's calibration could be off also - why was it sold? On Sun, Jul 18, 2010 at 3:32 PM, Kaleb C. Striplin wrote: the whole point of these machines is if its low, you dont know how much is in there so you recover the refrigerant, program how much its supposed to have and it does the rest. I suppose its possible the machine put in more than it said. If it came down to it I could start it at say 3lbs, then put in a little more at a time. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 01:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
The machine's calibration could be off also - why was it sold? On Sun, Jul 18, 2010 at 3:32 PM, Kaleb C. Striplin wrote: > the whole point of these machines is if its low, you dont know how much is > in there so you recover the refrigerant, program how much its supposed to > have and it does the rest. I suppose its possible the machine put in more > than it said. If it came down to it I could start it at say 3lbs, then put > in a little more at a time. > -- OK Don Panic! (the national past time). ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
the whole point of these machines is if its low, you dont know how much is in there so you recover the refrigerant, program how much its supposed to have and it does the rest. I suppose its possible the machine put in more than it said. If it came down to it I could start it at say 3lbs, then put in a little more at a time. Mitch Haley wrote: Kaleb C. Striplin wrote: I checked online and found Napa has charging capacities for most cars. It shows 4lbs on my suburban. Right now I am pulling a vacuum for an hour, and will charge with 4lbs and see what happens. Why not aim low and work your way up to it? Maybe you're not getting it all out, or maybe the machine is putting more in than you think. It sure sounds like you were more than 6% overcharged this morning. Mitch. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Kaleb C. Striplin wrote: I checked online and found Napa has charging capacities for most cars. It shows 4lbs on my suburban. Right now I am pulling a vacuum for an hour, and will charge with 4lbs and see what happens. Why not aim low and work your way up to it? Maybe you're not getting it all out, or maybe the machine is putting more in than you think. It sure sounds like you were more than 6% overcharged this morning. Mitch. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
I checked online and found Napa has charging capacities for most cars. It shows 4lbs on my suburban. Right now I am pulling a vacuum for an hour, and will charge with 4lbs and see what happens. Peter Frederick wrote: Yeah, overcharging will do the same thing. I use a little over 2 lbs R134a in the Benz, so 4.25 for a dual system should be about right. Might try 3 and see what happens, you can always add more if you need it. Peter -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Yeah, overcharging will do the same thing. I use a little over 2 lbs R134a in the Benz, so 4.25 for a dual system should be about right. Might try 3 and see what happens, you can always add more if you need it. Peter -Original Message- >From: "Kaleb C. Striplin" >Sent: Jul 18, 2010 1:49 PM >To: Mercedes Discussion List >Subject: Re: [MBZ] I buy a new AC machine, now have AC problems > >when I rebuilt it last year, I replaced the compressor with a new (not >rebuilt) r4, replaced rear expansion valve, replaced orifice tube in the >front (I dont recall it being pluggd up). I also flushed everything >while it was torn apart. I removed the radiator as well to clean out >the crap between it and the condenser. I am recovering the refrigerant >now and will put in on a vacuum for an hour, then recharge it. See post >just a minute ago. It did run now, but acts like its overcharged or >something. > >Peter Frederick wrote: >> Did you flush the condenser and is it clear of debris between the radiator >> and condenser? Sounds like what my TE does -- high side is too high and >> cooling is inadequate with high pressure, and I'm quite certain the plugged >> up condenser is the problem. If it's too hot from no air flow, the freon >> will not condense properly, so you have both excessive pressure and lousy >> cooling from hot gas instead of liquid at the orifice tube in front. If the >> expansion valve is working correctly, it will be wide open, too, and again >> you get high low side pressure from gas expansion rather than liquid boiling >> -- somewhat less cooling capacity. >> >> You must also evacuate for at least 45 min to remove air and water, >> particularly water, from the system -- R134a oils hold much more water than >> R12 oils, and it takes some time for them to evaporate and migrate out via >> the vacuum pump. >> >> I found that flushing the condenser alone made a huge difference -- if the >> system was ever R12, all the mineral oil will tend to collect in the >> condenser, coating the inside and greatly reducing heat transfer. >> >> Also, was the orifice tube clogged? If it was, did you put a filter in the >> low side hose, and if so, have you replaced it? Slop in there will also >> cause high side excessive pressure, and if the filter is between the fitting >> and the compressor, you can have a vacuum between the filter and the >> compressor and high pressure "upstream" of the filter! >> >> Peter >> >> >> -Original Message- >> >>> From: Mitch Haley >>> Sent: Jul 18, 2010 11:42 AM >>> To: Mercedes Discussion List >>> Subject: Re: [MBZ] I buy a new AC machine, now have AC problems >>> >>> Kaleb C. Striplin wrote: >>> >>>> Its R134. got the spec out of the owners manual, there is no sticker >>>> under the hood which is strange. >>>> >>> OK, sight window won't help much then. Was it always R134, or was the 4 1/4 >>> lb >>> the R12 capacity? (remember to use 3/4 as much r134 as r12. >>> >>> If it was working somewhat with 2.x in it and hydrolocks with 4.25 in it, >>> I'm >>> still thinking you want less than 4.25. >>> >>> ___ >>> http://www.okiebenz.com >>> For new and used parts go to www.okiebenz.com >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> >> ___ >> http://www.okiebenz.com >> For new and used parts go to www.okiebenz.com >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> > >-- >Kaleb C. Striplin/Claremore, OK > 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, > 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, > 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, >http://www.okiebenz.com > >___ >http://www.okiebenz.com >For new and used parts go to www.okiebenz.com >To search list archives http://www.okiebenz.com/archive/ > >To Unsubscribe or change delivery options go to: >http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
when I rebuilt it last year, I replaced the compressor with a new (not rebuilt) r4, replaced rear expansion valve, replaced orifice tube in the front (I dont recall it being pluggd up). I also flushed everything while it was torn apart. I removed the radiator as well to clean out the crap between it and the condenser. I am recovering the refrigerant now and will put in on a vacuum for an hour, then recharge it. See post just a minute ago. It did run now, but acts like its overcharged or something. Peter Frederick wrote: Did you flush the condenser and is it clear of debris between the radiator and condenser? Sounds like what my TE does -- high side is too high and cooling is inadequate with high pressure, and I'm quite certain the plugged up condenser is the problem. If it's too hot from no air flow, the freon will not condense properly, so you have both excessive pressure and lousy cooling from hot gas instead of liquid at the orifice tube in front. If the expansion valve is working correctly, it will be wide open, too, and again you get high low side pressure from gas expansion rather than liquid boiling -- somewhat less cooling capacity. You must also evacuate for at least 45 min to remove air and water, particularly water, from the system -- R134a oils hold much more water than R12 oils, and it takes some time for them to evaporate and migrate out via the vacuum pump. I found that flushing the condenser alone made a huge difference -- if the system was ever R12, all the mineral oil will tend to collect in the condenser, coating the inside and greatly reducing heat transfer. Also, was the orifice tube clogged? If it was, did you put a filter in the low side hose, and if so, have you replaced it? Slop in there will also cause high side excessive pressure, and if the filter is between the fitting and the compressor, you can have a vacuum between the filter and the compressor and high pressure "upstream" of the filter! Peter -Original Message- From: Mitch Haley Sent: Jul 18, 2010 11:42 AM To: Mercedes Discussion List Subject: Re: [MBZ] I buy a new AC machine, now have AC problems Kaleb C. Striplin wrote: Its R134. got the spec out of the owners manual, there is no sticker under the hood which is strange. OK, sight window won't help much then. Was it always R134, or was the 4 1/4 lb the R12 capacity? (remember to use 3/4 as much r134 as r12. If it was working somewhat with 2.x in it and hydrolocks with 4.25 in it, I'm still thinking you want less than 4.25. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Its always been R134, thats the spec the owners manual gives for 134. Mitch Haley wrote: Kaleb C. Striplin wrote: Its R134. got the spec out of the owners manual, there is no sticker under the hood which is strange. OK, sight window won't help much then. Was it always R134, or was the 4 1/4 lb the R12 capacity? (remember to use 3/4 as much r134 as r12. If it was working somewhat with 2.x in it and hydrolocks with 4.25 in it, I'm still thinking you want less than 4.25. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 01:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
well I just messed with it again and the pressure had equalized, so I started it up and the compressor ran, although high side was close to 400, low side about 70. Seems like its overcharged to me. When you rev it up, compressor kicks out because high side pressure gets too high. I am evacuating again and redoing it. Mitch Haley wrote: There's always the possibility you have too much R12 in it. Can you suck it out, put in a couple of pounds, and then trickle more in until the sight window goes clear? Are you sure you have the spec correct? I looked up a friend's 1993 Corolla somewhere and it was about 50oz, but a sticker under the hood says 28oz. Works great with 28oz in it, no way it would work with 50-54oz in it. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 01:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Did you flush the condenser and is it clear of debris between the radiator and condenser? Sounds like what my TE does -- high side is too high and cooling is inadequate with high pressure, and I'm quite certain the plugged up condenser is the problem. If it's too hot from no air flow, the freon will not condense properly, so you have both excessive pressure and lousy cooling from hot gas instead of liquid at the orifice tube in front. If the expansion valve is working correctly, it will be wide open, too, and again you get high low side pressure from gas expansion rather than liquid boiling -- somewhat less cooling capacity. You must also evacuate for at least 45 min to remove air and water, particularly water, from the system -- R134a oils hold much more water than R12 oils, and it takes some time for them to evaporate and migrate out via the vacuum pump. I found that flushing the condenser alone made a huge difference -- if the system was ever R12, all the mineral oil will tend to collect in the condenser, coating the inside and greatly reducing heat transfer. Also, was the orifice tube clogged? If it was, did you put a filter in the low side hose, and if so, have you replaced it? Slop in there will also cause high side excessive pressure, and if the filter is between the fitting and the compressor, you can have a vacuum between the filter and the compressor and high pressure "upstream" of the filter! Peter -Original Message- >From: Mitch Haley >Sent: Jul 18, 2010 11:42 AM >To: Mercedes Discussion List >Subject: Re: [MBZ] I buy a new AC machine, now have AC problems > >Kaleb C. Striplin wrote: >> Its R134. got the spec out of the owners manual, there is no sticker >> under the hood which is strange. > >OK, sight window won't help much then. Was it always R134, or was the 4 1/4 lb >the R12 capacity? (remember to use 3/4 as much r134 as r12. > >If it was working somewhat with 2.x in it and hydrolocks with 4.25 in it, I'm >still thinking you want less than 4.25. > >___ >http://www.okiebenz.com >For new and used parts go to www.okiebenz.com >To search list archives http://www.okiebenz.com/archive/ > >To Unsubscribe or change delivery options go to: >http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Kaleb C. Striplin wrote: Its R134. got the spec out of the owners manual, there is no sticker under the hood which is strange. OK, sight window won't help much then. Was it always R134, or was the 4 1/4 lb the R12 capacity? (remember to use 3/4 as much r134 as r12. If it was working somewhat with 2.x in it and hydrolocks with 4.25 in it, I'm still thinking you want less than 4.25. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
Its R134. got the spec out of the owners manual, there is no sticker under the hood which is strange. Mitch Haley wrote: There's always the possibility you have too much R12 in it. Can you suck it out, put in a couple of pounds, and then trickle more in until the sight window goes clear? Are you sure you have the spec correct? I looked up a friend's 1993 Corolla somewhere and it was about 50oz, but a sticker under the hood says 28oz. Works great with 28oz in it, no way it would work with 50-54oz in it. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.839 / Virus Database: 271.1.1/3013 - Release Date: 07/18/10 01:35:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
There's always the possibility you have too much R12 in it. Can you suck it out, put in a couple of pounds, and then trickle more in until the sight window goes clear? Are you sure you have the spec correct? I looked up a friend's 1993 Corolla somewhere and it was about 50oz, but a sticker under the hood says 28oz. Works great with 28oz in it, no way it would work with 50-54oz in it. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
If the back exp valve stuck I could see it causing the back unit to not work, but I cant see it causing this problem. I think either I got something plugging up with orifice tube in the front, or maybe something is plugged up in the accumulator? Could a valve or something in the compressor sticking open or closed cause this? As it said, it worked just fine before I evacuated and recharged. Brian Toscano wrote: I'd think the orifice tube or expansion valve can stick open, closed, or anywhere in between. It might pull vacuum depending on how it was stuck. Regards, Brian -Original Message- From: "Kaleb C. Striplin" Sender: mercedes-boun...@okiebenz.com Date: Sun, 18 Jul 2010 10:36:27 To: mercedes Mailing List Reply-To: Mercedes Discussion List Subject: [MBZ] I buy a new AC machine, now have AC problems I bought a new (to me) Robinair ac recovery recycle charging machine yesterday. This one is a dual machine and will do both 134 and r12. It came with about 20 lbs of r12. I am now going to sell my 2 snap on machines. So yesterday I am trying it out on my Suburban. The Suburban is not cooling all the great. I pretty much completely rebuilt the ac last year complete with new compressor, accumulator, orifice tube in the front, expansion valve in the back. I hook the machine up and recover the refrigerant, it recovers about 2.9 lbs. System holds 4.25. After I recover, I pull a vacuum and it pulls fine down to 30" pretty quick. I pull the vacuum for about 5 minutes and let it sit for about 15 or so to see if it loses any vacuum. I then set the machine to charge in 4.25 lbs, which it does just fine. After charged I start the truck and turn on the AC. I start hearing the belt squeel as the compressor is turning, slowing down, then stopping till the clutch cuts out. Strange. I watch the guages and as soon as the compressor kicks in, high side shoots to well over 400, like 450 or more. Low side never moves, it stays at around 60lbs which is about what it was showing after charged before the system was started. The strange thing is it worked just fine before I messed with it, nothing was done that I can see would cause a problem. It acts like something is plugged up somewhere. Do you think maybe when I pulled the vacuum it sucked something loose and plugged up the orifice tube or something? on the other hand, it seems that if something was plugged, the high side would go real high, and the low side would go real low maybe to a vacuum, but it just stays where its at. I am fixing to head out and recover again and pull the system apart but this is just strange, what could cause this problem? -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] I buy a new AC machine, now have AC problems
I'd think the orifice tube or expansion valve can stick open, closed, or anywhere in between. It might pull vacuum depending on how it was stuck. Regards, Brian -Original Message- From: "Kaleb C. Striplin" Sender: mercedes-boun...@okiebenz.com Date: Sun, 18 Jul 2010 10:36:27 To: mercedes Mailing List Reply-To: Mercedes Discussion List Subject: [MBZ] I buy a new AC machine, now have AC problems I bought a new (to me) Robinair ac recovery recycle charging machine yesterday. This one is a dual machine and will do both 134 and r12. It came with about 20 lbs of r12. I am now going to sell my 2 snap on machines. So yesterday I am trying it out on my Suburban. The Suburban is not cooling all the great. I pretty much completely rebuilt the ac last year complete with new compressor, accumulator, orifice tube in the front, expansion valve in the back. I hook the machine up and recover the refrigerant, it recovers about 2.9 lbs. System holds 4.25. After I recover, I pull a vacuum and it pulls fine down to 30" pretty quick. I pull the vacuum for about 5 minutes and let it sit for about 15 or so to see if it loses any vacuum. I then set the machine to charge in 4.25 lbs, which it does just fine. After charged I start the truck and turn on the AC. I start hearing the belt squeel as the compressor is turning, slowing down, then stopping till the clutch cuts out. Strange. I watch the guages and as soon as the compressor kicks in, high side shoots to well over 400, like 450 or more. Low side never moves, it stays at around 60lbs which is about what it was showing after charged before the system was started. The strange thing is it worked just fine before I messed with it, nothing was done that I can see would cause a problem. It acts like something is plugged up somewhere. Do you think maybe when I pulled the vacuum it sucked something loose and plugged up the orifice tube or something? on the other hand, it seems that if something was plugged, the high side would go real high, and the low side would go real low maybe to a vacuum, but it just stays where its at. I am fixing to head out and recover again and pull the system apart but this is just strange, what could cause this problem? -- Kaleb C. Striplin/Claremore, OK 95 E300, 94 S500, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
