| [GMCnet] What model is this? AND Changing my A/C system over to R-134 [message #182031] |
Mon, 27 August 2012 20:58  |
Tim Jeffries
Messages: 35
Registered: August 2012
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I am enjoying all the emails and blogs I get from the club
members. lots of valuable information.
However, I don't have a clue as to how to ask a question or to blog to
the group for info or to share some.
I'm not just new to GMC - but new to this forum-thing as well.
So I wrote out in Word - and have cut and pasted my questions:
I have no idea how to determine which of the several “models” of my 26
/ 455 unit (possibly Canyonlands?) is. It seems most of those of you
that are posting these blogs know exactly which you have. How does
one tell? It was originally a kind of dark yellow/orange. (now
off-white w Blue shades of stripes).
My system is still the old “Freon” type R-12 since the system is
virtually empty (yes, thankfully, there was a small hiss when the
lines were opened) Indicating that there is probably NO MOISTURE in
the system, whew.
My A/C system is still R-12 - it has never been converted.
... But the Magic Bus hadn’t been driven for several
years. The PO (a neighbor) states that it "blows cold" but hadn't used
it for at least 6 years.
But then he only drove the vehicle 200 miles in the 7 years he owned
it. Then the mice took over (inside the A/c-Heating blower fan so he
quit running it while starting the vehicle.
He bought the vehicle to live in as a construction site vehicle/home while
re-building his house that had burned down in the terrible 2003
wild-fires in north SD County, so he rarely drove it and really didn't
have much to go on.
So now that I'm Going to switch to R-134. What things are there to consider?
I have not checked for leaks
– and now the hoses are off the vehicle. I took them in to have them
replaced (made-up) and the cost is a whopping $154 for the 3 hoses –
from a Parker Store [Comoso (Controlled Motion Solutions) - in
Escondido, CA]
Where I will possibly give them the green light once I hear back from
you/someone.
A few Q's and concerns: 1. another trusted mechanic source (that USED
TO make up A/C lines) says: "Just put 'em back in. If they leak, it
may only be a half-pound a year or so -you can top that off (with
R-134)."
2. my shade tree mechanic wants me to SPEND MONEY -(I don't want to
-if they are working) and replace the lines (thinking the rubber is
different from the rubber used on freon/R-134 hoses - now I believe he
is wrong in that thinking)
3. the rubber hoses are the original hoses -how many more years will they last?
4. I'm a follower of "if it works, don't fix it" - but there is a
certain comfort in having "new" lines installed as well.
5. the oil used in the compressor, which SHOULD light up once the
system is full - (we tested it and it seems good) is petroleum based
oil which doesn't get along with R-134 so it will be changed to the
mineral oil that will be put in when I throw the hoses back on (It
puts the machine "out of order" to take the compressor out just yet
-due to the v-belt system. The compressor gets emptied and filled with
mineral oil to match the R-134.)
In looking back on this, these aren't really questions, just that I'm
sure one of you folks has more info than the sum total of what my
(posted) knowledge-base is.
6. the system apparently will take around 3.75 cans (at 12 oz.) of
R-134. Cost about $16-$18 per can incl tax, so around $75-$80.
Can I get R-134 cheaper somewhere? This was O'Reilly AP.
What would you do?
I will take your answer to my call off the air....LOL.
Respectfully,
Tim - the Magic Bus 26er. 760-877-2778
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