[AT] OT: sleeper air

[Cecil R Bearden]

When I took off the roof of my New Holland TS110, It had a layer of crud 
that was just like tar paper
  over the blower side of the fins of the evaporator.  I vacuumed it out 
with a shop vac, and washed the fins out with Windex.   It now works 
better than before.  I changed the filters on the outside and inside, 
and this resulted in a colder temp overall, and even saves about 10 
gallons of fuel a day.  By cleaning the evaporator coils, the head 
pressure is lowered and probably takes less HP to run the compressor.

I got a refrig scale and tried charging the Dodge van with that ES12A 
freon replacement that was supposed to be the same as Red Tek 12A.   I 
still would not cool.   I removed the crap, vacuumed it down and 
replaced it with R134A 5 cans, or 3.75 lbs.  It now works nearly as good 
as it always did.  It is not the best when idling, but it may get 
better.   It still will blow 40 deg air at 1100 RPM, So I can live with 
that.    Guess I will have to get another jug of R134A or  Red Tek , and 
try to stick this ES-12A where the sun don't shine in the Manuf.....   I 
think it is just a bad batch of refrigerant.

Cecil in OKla

On 7/8/2012 6:50 PM, Ron Cook wrote:
> Cecil and Charlie,
>       Danged if I can tell what was going on with that sleeper a/c unit.
> It decided to work perfectly today.  It is a Behr unit and there is no
> solenoid in the refrigerant line.  It just circulates when the pump is
> going.  The expansion valve takes care of things, I guess.  It must have
> been asleep.  The high pressure is fluctuating some at times when it is
> running with both front and rear operating.  Probably normal, or at
> least usual.  It does not seem to be bothering much but the gauge.  I
> might be slightly overcharged. Time will more than likely take care of
> that condition.
>        There is a water control valve for the heater part and it is/was
> in the cold position and I have the water valves shut off anyway at the
> engine.  There is a 3 speed fan that is controlled by a switch in the
> sleeper.  That's it.  Simple.
>       While I was in there, I cleaned things a bit.  It needed it.  It is
> now working better than it ever has for me.  Because of the cleaning, I
> suppose.
>       Thanks for all the tips, etc.
>
> Ron Cook
> Salix, IA
>
> On 7/8/2012 6:35 AM, charlie hill wrote:
>> Ron,   not knowing a thing about that system, I'm assuming the rear air is
>> turned on by an electric switch on the dash somewhere or back in the
>> sleeper.  Is it possible that the switch, after sitting up so long, is
>> corroded and not making contact?  Or as Farmer would say.... Check the
>> grounds!  It might not be a problem in the AC at all but just a control
>> problem.
>>
>> Charlie
>>
>> -----Original Message-----
>> From: Ron Cook
>> Sent: Sunday, July 08, 2012 1:11 AM
>> To: Antique tractor email discussion group
>> Subject: Re: [AT] OT: sleeper air
>>
>> Cecil,
>>        Thanks for the tip.  It acts just like a valve is not opening. I
>> did not get a chance to look at the unit yet, but I did look in the
>> manual.  I think I have a Behr unit and they do not use a solenoid valve
>> according to the manual, just the expansion valve. But that does not
>> always tell the truth about how things really are.  I do know there is
>> no valve where they tee off, but the Red Dot units do have a freon
>> solenoid just inside the unit under the cover.  I'll take a look at it
>> maybe tomorrow.
>>
>> Ron Cook
>> Salix, IA
>>
>> On 7/7/2012 1:00 PM, Cecil R Bearden wrote:
>>> Ron:
>>> Does it have a solenoid valve that opens to allow freon to the sleeper
>>> evaporator?  If so, it might just be a bad connection or wiring
>>> problem.   I have not had that much problems with expansion valves...
>>> However, I may be having one on my big van...
>>> If there is no temp change on your lines, then there is probably no
>>> freon circulating.  I would look for a valve on the lines going to the
>>> back or where they tee off the main line.
>>>
>>> Cecil in OKla
>>>
>>> On 7/7/2012 10:52 AM, Ron Cook wrote:
>>>> Yesterday it was hot enough that I decided to run the sleeper air in my
>>>> Freightliner to augment the cab air.  I have not run that sleeper air
>>>> for a few years, I suppose.  3, maybe 4.
>>>>
>>>> No cooling happening there!  Apparently no refrigerant passing through
>>>> the evaporator at all.  No hot nor cold line to the touch. Do you
>>>> suppose that expansion valve is stuck or plumb plugged up with foreign
>>>> matter?  That has to be where the problem lies.  Some disassembly
>>>> required, I think.
>>>>
>>>> Front air works good, I just wanted to turn it into a meat locker, I
>>>> guess.:-)
>>>>
>>>> Ron Cook
>>>> Salix, IA
>>>> _______________________________________________
>>>>
>>>>
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