[AT] Air conditioning problems In my parts getter...

[Mark Johnson]

It's no secret that tractor cab A/C is an even more hostile physical 
environment than automobiles in which to keep the seals and couplings 
intact!

On the surface of the earth, I can't think of a worse place to try to 
keep a chiller charged and running...

Mark J

On 6/10/2021 10:58 PM, Cecil Bearden wrote:
> Steve:
>
> I will check into it.  Some of the tractors have some leaks I can't find.
> Cecil
>
>
> On 6/10/2021 9:16 PM, Steve W. wrote:
>> Cecil Bearden wrote:
>>>
>>>
>>> I have repaired my own systems for over 50 years. I refuse to work 
>>> on my wife's 2017 Grand Caravan. have to remove the battery box to 
>>> get to the high side port. However, 2 years ago it only had 1.25 lbs 
>>> in it, 2.5 full. Dealership vacuumed it and charged and found no 
>>> leaks. Last week, something sounded like a popoff valve at the right 
>>> rear and air conditioning was not as cold as 10 minutes before. 
>>> Yesterday evening, went to wash car and it ran for 30 minutes 
>>> without cooling at all. Dealership checked it today and only had .25 
>>> lbs. Held vacuum for 20 minutes without dropping. The recharged it 
>>> with dye and let it run an hour and rechecked. No leaks. Any idea 
>>> where it is going..??
>>>
>>> I baled about 6 acres of wheat/grass/weeds that I cut yesterday.  I 
>>> wanted to bale it green so it would go through a sweat and kill the 
>>> weed seeds.  It made 21  4x5 bales.  They were heavy since the green 
>>> was still there too.  The cows had grazed on it for over 10 days, It 
>>> would have made another 10 if they had not bedded down in it so 
>>> much..  I let them graze out 10 acres and they nearly nubbed it to 
>>> the ground.  The wheat I sowed in March is still coming up!  I am 
>>> going to spray the entire field for weeds and then try to sow cane 
>>> or hay grazer for some hay.  I have to get it cut off to sow wheat 
>>> by the end of August.  Here, if wheat is not sowed by the end of 
>>> August, it won't get any rain until almost November..   Field across 
>>> the road was in wheat I think, and they cut it for hay and now it 
>>> has resprouted  8 inches.  They were applying liquid fertilizer on 
>>> it today, guess they are going to try for double cropping. Maybe 
>>> they sowed ryegrass on it, it will regrow.
>>>
>>> Cecil
>>>
>>
>> That one still has 134A in it I believe. Sounds like it also has the 
>> rear AC option. I would suspect one of the rear lines, but they 
>> should have found that if it's leaking that fast. I use CO2 for 
>> testing these days as you can buy a nice cheap chemical that changes 
>> color fast when exposed to small amounts of it and you can spray it 
>> around the system, then charge with CO2 and usually spot the leak 
>> much faster than with dye. Then it's a simple matter of venting the 
>> CO2 out, repair the leak,  pull a vacuum and recharge. Currently I'm 
>> not touching the 1234YF stuff yet, way to expensive to buy all the 
>> gear to do it when it isn't all that common in used vehicles around 
>> here yet.
>>
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