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From: Steve Smith Richmond VA on 18 Sep 2009 08:27

> To find out which one, we need to know the year of the truck.

It's a 1997.
From: Retired VIP on 18 Sep 2009 09:26
On Thu, 17 Sep 2009 16:36:31 -0700, "Jeff Strickland"
<crwlrjeff(a)yahoo.com> wrote:

>If you gotta ask ...
>
>It is either R134a or R12. If R12, you cannot charge it. If R134a, then you
>can.

If you can find some R12, then you can charge the system. If you have
the proper can adaptor and gauge set. Close the door on your garage
so the neighbors can't see you destroying their Ozone. Also it will
keep the NSA from seeing you destroying the Ozone over the South Pole.

Jack j
From: Ray O on 18 Sep 2009 13:09

"Steve Smith Richmond VA" <Cabinut(a)verizon.net> wrote in message
news:2f60bcfa-55e4-4e8a-9ca6-cc40a568d848(a)p9g2000vbl.googlegroups.com...
>
>> To find out which one, we need to know the year of the truck.
>
> It's a 1997.

I'm pretty sure that the 1997 T100's AC system uses R34-A.

Some things you should be aware of:

- You are supposed to have an EPA certification to work on AC systems.
- There are substantial fines for venting refrigerant to the atmosphere.
- The proper way to service the AC system is with a refrigerant recovery
machine, vacuum pump, and AC gauges for the type of refrigerant you are
using.
- If the system has been exposed to the atmosphere for any length of time,
the desiccant in the receiver drier may be saturated and so moisture in the
system may cause corrosion or freezing at the expansion valve.
- over-charging the AC system can cause physical damage to the person doing
the charging and to the AC system.
- wear safety goggles when working on a pressurized AC system!
--

Ray O
(correct punctuation to reply)


From: Jeff Strickland on 18 Sep 2009 14:33

"Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message
news:h90es1$fqd$1(a)news.eternal-september.org...
>
> "Steve Smith Richmond VA" <Cabinut(a)verizon.net> wrote in message
> news:2f60bcfa-55e4-4e8a-9ca6-cc40a568d848(a)p9g2000vbl.googlegroups.com...
>>
>>> To find out which one, we need to know the year of the truck.
>>
>> It's a 1997.
>
> I'm pretty sure that the 1997 T100's AC system uses R34-A.
>
> Some things you should be aware of:
>
> - You are supposed to have an EPA certification to work on AC systems.
> - There are substantial fines for venting refrigerant to the atmosphere.
> - The proper way to service the AC system is with a refrigerant recovery
> machine, vacuum pump, and AC gauges for the type of refrigerant you are
> using.
> - If the system has been exposed to the atmosphere for any length of time,
> the desiccant in the receiver drier may be saturated and so moisture in
> the system may cause corrosion or freezing at the expansion valve.
> - over-charging the AC system can cause physical damage to the person
> doing the charging and to the AC system.
> - wear safety goggles when working on a pressurized AC system!
> --



Ray,

You can drop by your local autoparts store and buy small (14.5 oz.) cans of
R134a and a hose to connect it to the Low Pressure Port on the system. If
the system is sound but merely needs a refresher can of juice (R134a)
because it can seep out over time, then the small can is enough to get the
system going again. There is no reason to vent anything, no need to
evacuate, no need for anything but a fresh can of juice.

If the system has developed a leak -- serious enough to cause catastrophic
loss -- then it is required to evacuate and recharge the system, after
fixing the leaks of course. If the system has been exposed to air, then all
of the things you say are correct, bu tif the system merely needs a
refresher can of juice, then the OP can easily do this taks at home.

The OP can screw up the system too, in which case he'll need professional
help to evacuate and recharge.









From: Ray O on 18 Sep 2009 15:01

"Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote in message
news:h90jpl$rb3$1(a)news.eternal-september.org...
>
> "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message
> news:h90es1$fqd$1(a)news.eternal-september.org...
>>
>> "Steve Smith Richmond VA" <Cabinut(a)verizon.net> wrote in message
>> news:2f60bcfa-55e4-4e8a-9ca6-cc40a568d848(a)p9g2000vbl.googlegroups.com...
>>>
>>>> To find out which one, we need to know the year of the truck.
>>>
>>> It's a 1997.
>>
>> I'm pretty sure that the 1997 T100's AC system uses R34-A.
>>
>> Some things you should be aware of:
>>
>> - You are supposed to have an EPA certification to work on AC systems.
>> - There are substantial fines for venting refrigerant to the atmosphere.
>> - The proper way to service the AC system is with a refrigerant recovery
>> machine, vacuum pump, and AC gauges for the type of refrigerant you are
>> using.
>> - If the system has been exposed to the atmosphere for any length of
>> time, the desiccant in the receiver drier may be saturated and so
>> moisture in the system may cause corrosion or freezing at the expansion
>> valve.
>> - over-charging the AC system can cause physical damage to the person
>> doing the charging and to the AC system.
>> - wear safety goggles when working on a pressurized AC system!
>> --
>
>
>
> Ray,
>
> You can drop by your local autoparts store and buy small (14.5 oz.) cans
> of R134a and a hose to connect it to the Low Pressure Port on the system.
> If the system is sound but merely needs a refresher can of juice (R134a)
> because it can seep out over time, then the small can is enough to get the
> system going again. There is no reason to vent anything, no need to
> evacuate, no need for anything but a fresh can of juice.

I am aware of the small cans of refrigerant for do-it-yourselfers. We used
to refer to them as "suicide cans" because under the old system, it was
possible to hook it up to the high pressure side with potentially explosive
results.

If you re-read my post, note that I said that the **proper** way to service
the AC system...

I could have added that the amateur way that may or may not work to service
the AC systrem is to use those D-I-Y cans, but I generally do not give
advice that I think is a bad idea, and the automakers and the EPA agree.

There are several reasons I think using suicide cans is a bad idea.

First, IMO, someone who has to ask what type of refrigerant to use without
the ability or willingness to find the answer probably shouldn't be messing
with a system that could be costly to fix if improper procedures are
followed.

Second, there is no way to tell the mass of the refrigerant remaining in the
system so there is no way to tell how much should be added. The factory
repair manual will tell you to evacuate and recover the refrigerant and will
not suggest topping off refrigerant. Are you aware that too much
refrigerant can also cause problems with AC system function?

Third, the other reason that the system is evacuated and a vacuum drawn is
to check and quantify the integrity of the system without needlessly
releasing refrigerant to the atmosphere.

Fourth, if you add suicide cans and the system is leaking, not only have you
wasted the money spent on the suicide cans, you have carelessly released
harmful gases to the atmosphere, which the EPA frowns upon.

Fifth, if there is atmosphere in the system, adding suicide cans does not
purge the atmosphere so you are in effect trapping moisture and
non-refrigerant gases in the system.

>
> If the system has developed a leak -- serious enough to cause catastrophic
> loss -- then it is required to evacuate and recharge the system, after
> fixing the leaks of course. If the system has been exposed to air, then
> all of the things you say are correct, bu tif the system merely needs a
> refresher can of juice, then the OP can easily do this taks at home.

All of the things I say are correct even if the system has not been exposed
to air.

>
> The OP can screw up the system too, in which case he'll need professional
> help to evacuate and recharge.
>

Is it better to give advice that gives the OP the opportunity to screw up
the system or is it better to give advice that is procedurally and legally
correct?
--

Ray O
(correct punctuation to reply)


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