I recharged my truck AC again on Friday, I had put some 134 in a coupla
weeks ago and it was not BLOWING ICE COLD then, but cool enough. Then
it wasn't. So the other day I put the can on, grabbed the throttle
cable, and revved the engine up to maybe 2000, and it started sucking in
more juice, and the input pressure was showing a lot lower. I let it go
until it did not seem to be sucking in any more, and at that point the
vents were BLOWING ICE COLD. I recall Max or someone saying that the
pressure readings should be done at some higher RPM, so figured that
might help move some more juice in too, which it did.
I have not yet got out my HF gauge set and vac pump to fool with it,
press of time and laziness mostly.
--R
On 7/31/2010 3:56 PM, Kaleb C. Striplin wrote:
Well today I recovered the refrigerant back out of the suburban
again. Machine said it recovered about 2.5 lb out. It was either way
overcharged or had a bunch of air in it as you remember. Now this
machine, when its recovering, puts it in the recovery tank Its
supposed to shut off automatically when the system is drawn to a
partial vacuum. It goes on for a long time and finally errors out a
high pressure error, which means it has too much pressure in the
recovery tank. So what is happening it looks like is its somehow
pumping air into the tank. From what I understand, during the normal
course of recovery it may get a little air in the tank, but it should
not be enough to cause this. Then, when you go to recycle, it will
purge the air out. Once it hit this high pressure warning I cancelled
it because it appeared the burbs system was empty anyway. I then went
thru the recovery and it purged out some air. It think it also purged
out my refrigerant out of the tank or leaked, bucause is basically
showing nothing in the tank now. I need to go thru this thing and
check for leaks. Im pretty sure the tank valves are leaking but I
would not think enough to cause this.
Anyway back to the suburban. I pulled a vacuum then switched to my
regular manifold guages and charged in with cans. Seems to be running
fine now. Still not as cold as I would like but it seems like it
might be a little better than it was. Long story short, playing
around with my new machine I have probalby lost a total of 15 or more
lbs of R134. Damn. I should have started with a smaller system like
a car to try it out on first.
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