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XT in pa 
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Joined: 21 Apr 2011
Location: hickory pa
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 Topic: 7045 air conditioner
Posted: 27 Jun 2011 at 9:12am |
how much 134 a goes in a 7045 unit
Shawn
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190XT,D17and 7045
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ryan(IN)
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Posted: 27 Jun 2011 at 1:18pm |
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If you have a scales i think its 3.5 lbs. somebody should chime in.
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ryan
1984 8070 FWA,1979 7060,1975 7040,1971 190,1960 D-17D,1957 D-14, 196? D-19G, 1975 5040,1971? 160,1994 R62
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XT in pa
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Joined: 21 Apr 2011
Location: hickory pa
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Posted: 27 Jun 2011 at 2:03pm |
ok i tried 2 12oz cans and it got warmer lol now what ?
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190XT,D17and 7045
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BobHnwO
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Posted: 27 Jun 2011 at 3:22pm |
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Do you have gauges on it?
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Why do today what you can put off til tomorrow.
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Brian Jasper co. Ia
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Posted: 27 Jun 2011 at 7:39pm |
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What have you done so far? You have to remove all of the R12 first and evacuate the system. Typically a system converted from R12 to 134 will be 60% to 80% of the original R12 capacity.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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XT in pa
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Posted: 28 Jun 2011 at 8:04am |
 Brian Jasper co. Ia wrote:
What have you done so far? You have to remove all of the R12 first and evacuate the system. Typically a system converted from R12 to 134 will be 60% to 80% of the original R12 capacity. |
Brian the system was already changed over and it was not blowing cold air and i added 2 12 oz cans and now its warmer . i have no gauges to put on .
Shawn
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190XT,D17and 7045
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denny sd
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Posted: 28 Jun 2011 at 8:28am |
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Have you checked to make sure the heater is shut off, cable comes loose on top of cab. Sounds like your over charged condition. It is easy to over charge with 134.
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Brian Jasper co. Ia
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Posted: 28 Jun 2011 at 12:04pm |
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At this point, you need to recover the system and recharge with a known amount. You need a gauge set to see whats going on. Low charge is just one of several causes for poor cooling. A fan clutch that free wheels too much, radiator and condenser clogged with chaff, stuck thermal expansion valve are a few that come to mind. You're pretty much stuck taking it to someone with a recovery machine and gauges to get it working now. Don't just vent it off. If the system is discharged too fast, the oil goes out with it.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Stan IL&TN
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Posted: 28 Jun 2011 at 3:06pm |
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I thought R134 was safe for o-zone?
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1957 WD45 dad's first AC
1968 one-seventy
1956 F40 Ferguson
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XT in pa
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Posted: 28 Jun 2011 at 3:27pm |
so the gas has to come out not the liquid? if i would get a gauge, what pressure should it read to be good ?
thanks Shawn
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7060
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Posted: 28 Jun 2011 at 4:56pm |
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Are you sure the compressors still running? You might look at the front of the clutch and make sure.
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LouSWPA
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Posted: 28 Jun 2011 at 5:12pm |
XT in pa wrote:
how much 134 a goes in a 7045 unit
Shawn |
Shawn,
If you can wait 'till next week, I would be happy to come and give you a hand. I just struggled through one of these sucessfully. I have the gages, recouvery unit, scaled, etc. Really, w/o these and a little knowledge you're just wizzin in the wind. I'm not lookin' for money, maybe a free beer!
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Brian Jasper co. Ia
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Posted: 28 Jun 2011 at 9:07pm |
Stan IL&TN wrote:
I thought R134 was safe for o-zone? |
Its supposed to be less harmful to the ozone layer. The EPA still says you're not allowed to just vent it off.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Brian Jasper co. Ia
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Posted: 28 Jun 2011 at 9:14pm |
XT in pa wrote:
so the gas has to come out not the liquid? if i would get a gauge, what pressure should it read to be good ?
thanks Shawn |
All of the refrigerant that is in there has to come out. The way A/C works is the change of state of the refrigerant from a liquid to a gas. As the refrig evaporates in the evaporator, it gets cold. Sounds like Lou can help get you on the right path.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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XT in pa
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Posted: 29 Jun 2011 at 3:15pm |
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Lou that sounds great plz give me a call anytime i work 5pm to 5 am and i farm all day so anytime is good Shawn 724-255-9904
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190XT,D17and 7045
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LouSWPA
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Posted: 29 Jun 2011 at 6:06pm |
XT in pa wrote:
Lou that sounds great plz give me a call anytime i work 5pm to 5 am and i farm all day so anytime is good Shawn 724-255-9904 begin_of_the_skype_highlighting 724-255-9904 end_of_the_skype_highlighting |
OK, it's a little hard to call right now, I'm working in Asheville NC, but I'll be back Friday. I'll call ya.
I live near Intersection of 18 and 30
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Gregor
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Location: Prague, Ne
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Posted: 29 Jun 2011 at 8:19pm |
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my experience with ours is 3-4 cans. but should have seen a little cooling with 2. Maybe it is running out as fast as it is going in. time for guages on the system. if overcharged, your high side press will go extemely high and something could blow. But I feel 2 cans just isn't quite enough yet.
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