Re: Ah, the great R12 vs R134 debate...

["David Teitelbaum <jtrealty@xxxx>" <jtrealty@xxxx>]

I looked at the vacuum device you pointed out. I had to go to 
robinair.com to get the specs on it though. It will only pull to 29.7" 
mercury. This is enough to remove the refrigerent but nowhere near 
enough to pull a deep vacuum of micron range (you want to get in the 
400-500 micron range to boil out all of the moisture). Go to 
robinair.com and read all about evacuation of A/C systems and why you 
want to remove as much moisture as you can. Generally there is no 
substitute for quality tools, the vacuum pump I use is a robinair but 
not the air operated one! In many cases it does not pay to get the 
tools for a particular job unless you use them often. For instance I 
do not have a tire changer, balancer, exhaust gas analyzer, or 
alignment rack. This equipment is just too expensive unless it is used 
often, it is much smarter to find a shop that has good equipment and 
KNOWS how to use it properly. For most people A/C work is best left to 
profesionals who can afford the best equipment, deal with all of the 
paperwork and legal requirements. There is also some level of danger 
in handling the high pressures and the refrigerent so unless you know 
what you are doing it is safer to take it to a shop. I do not want to 
discourage anyone from working on their cars but some procedures are 
best left to others. For instance I would never recommend anyone 
trying to do their own glass work, it is just too dangerous and 
expensive if you damage the glass. Remember the most important thing 
is to work safely so you can enjoy your car. Nobody can do everything.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, john fredt <hecklerkochgmbh@xxxx> 
wrote:
> 
> 
> This isnt directly delorean realted but helpful for servicing 
themThere is a cheap alternative to having the shop service your air 
conditioning system.It is a small "air vac" vacuum pump driven by air 
from your air compressor.With this thing and a cheap set of gauges and 
hoses which can be got at most auto parts stores you can serivice it 
yourself.there are also kits available for flushing the system 
yourself which arent to expensive.The air vac can pull enough vacuum 
to evacute almost any system including the DeLoreans.Here is a link to 
where you can pick up this handy 
gadget-------.http://www.autotoolexpress.com/airvacforr12.html ----.It 
cost around $60 dollars which is quite a deal compared to the 
$300-$800 a regular vacuum pump costs. There are even shops who you 
use this thing.The cost of the air vac and hoses/gauges altogether 
shouldnt exceed $120.00 excluding shipping,but you should be able to 
find a dealer near you.The people who generally carry the air vac on 
hand sell to garages so it wont be a retail store.There is a set of 
r134 fitting adapters which should be included with any gauge set you 
buy make sure they are before you purchase it.I believe discount auto 
parts has a set right behind the parts counter hanging on a display 
rack near the o-rings for ac systems.If you have any further questions 
email me off list.
> 
> 
> 
> ---------------------------------
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now
> 
> [Non-text portions of this message have been removed]