[AT] OT: sleeper air

[Dean VP]

Ron,

Don't knock free gifts!  :-)

Dean VP
Snohomish, WA

"Do not go where the path may lead; go instead where there is no path and leave a trail."
- Ralph Waldo Emerson

-----Original Message-----
From: at-bounces at lists.antique-tractor.com [mailto:at-bounces at lists.antique-tractor.com]
On Behalf Of Ron Cook
Sent: Sunday, July 08, 2012 4:51 PM
To: Antique tractor email discussion group
Subject: Re: [AT] OT: sleeper air

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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