Levi,
R-12 connectors look like a Tire Stem welded to the pipe.
When R-12 to R-134 conversions are done the R-134 adapter is screwed on
top of the R-12 connector.
Some of the 134 adapters have Red Lock-Tite (Stud & Bearing) on the
threads making it hard to remove
the 134 adapter. But it can be
Also I believe the high side and low side valves are different, to
prevent consumers from accidentally connecting a recharge can to the
high side. This was possible in R12 systems and led to injuries as
the can would explode under pressure.
This was possible in _some_ R12 systems, but some late
"Levi Smith" <[EMAIL PROTECTED]> writes:
> So, then there are actually TWO shrader valves, one on top of the
> other? Or is the R12 one removed from the inside, then this R134
> with shrader fitted to the outside? Or is the R12 Shrader still
> there and this is just an outer fitting?
As I recal
So, then there are actually TWO shrader valves, one on top of the
other?
No. Either you remove the one in the R12 fitting before you put
on an R134a fitting that has its own, or the R134a fitting has
an extension to push the button on the R12's valve. The latter is
a pita because when/if the v
So, then there are actually TWO shrader valves, one on top of the other? Or
is the R12 one removed from the inside, then this R134 with shrader fitted
to the outside? Or is the R12 Shrader still there and this is just an outer
fitting?
Levi
On 5/30/07, Jim Cathey <[EMAIL PROTECTED]> wrote:
>
In an R12 system converted to R134a, I've heard that the service port
adapter fittings are "permanently" installed. Is this done with
threadlocker? Could they be removed to do a reverse conversion,
e.g. by using heat?
Yup. And the cheapies don't even really need that. I've removed
a connecto
In an R12 system converted to R134a, I've heard that the service port
adapter fittings are "permanently" installed. Is this done with
threadlocker? Could they be removed to do a reverse conversion,
e.g. by using heat?
Allan
Jim Cathey <[EMAIL PROTECTED]> writes:
>> Hmm... Dunno, I don't know
Hmm... Dunno, I don't know what R12 connectors are like.
They look an awful lot like a big-brother version of your
basic tire valve stem. (The metal part.)
It *looks* like that's part of the pipe... But for all I know,
perhaps it's somehow threaded onto a smaller piece on the pipe?
Exactl
Hmm... Dunno, I don't know what R12 connectors are like. There's a dust
cap that screws on to a "pop-on" coupling that works with any of the R134
refill kits. It *looks* like that's part of the pipe... But for all I
know, perhaps it's somehow threaded onto a smaller piece on the pipe?
This is
What kind of R134 connectors do you have?
The ones with their own schrader valves, or the ones that fit over
the R12 service connector and have a little pushrod to open the
original schrader valve? If the latter, can you fix the leak by
removing the adapter (or was it coated in permanent threadloc
290k
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Levi Smith
Sent: Tuesday, May 29, 2007 5:56 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] Leaking R134 valve
Hmm, ok anyone happen to know if there's any particular size to the low side
of th
If you have to swap the actual schrader valve, you will have to drain
the system first.
Levi Smith wrote:
Hmm, ok anyone happen to know if there's any particular size to the low side
of that R134 in my 83' 300D? I started calling a couple auto parts places
and they are telling me that there ar
Hmm, ok anyone happen to know if there's any particular size to the low side
of that R134 in my 83' 300D? I started calling a couple auto parts places
and they are telling me that there are lots of different sizes...
I was hoping that by some miracle I might be able to get the valve swapped
witho
I thought you had to have different valves to be R134 compliant?
The outside threads are different. The inside threads (for the
Schrader valve) are the same.
-- Jim
Different fittings. Still has the Schrader valve though.
Levi Smith wrote:
I thought you had to have different valves to be R134 compliant? I.e. R12
and R134 have different "standard" fittings and if you don't change the
valve then you won't be able to use the R134 charge fittings?
Levi
--
I thought you had to have different valves to be R134 compliant? I.e. R12
and R134 have different "standard" fittings and if you don't change the
valve then you won't be able to use the R134 charge fittings?
Levi
On 5/28/07, Jim Cathey <[EMAIL PROTECTED]> wrote:
> since the AC was somewhat us
since the AC was somewhat useful today. So, my questions are, is that
thing
a shrader valve? Either way can it be easily be replaced or otherwise
likely fixed?
It's a Schrader valve, but not exactly the same as a tire valve core.
They often start to come unscrewed, I've tightened a few which
Levi Smith wrote:
> So, my questions are, is that thing a shrader valve?
Yes, but I don't think a tire stem core will be a direct replacement.
You should be able to get new cores from an A/C repairman.
OK, so I went to add some R134 to my 83' 300d as I've done in the past.
Well, when I went to disconnect, the valve (low side) seems to be stuck
open. I'm getting a lot of oil and a bit of air coming out. I tried
reconnecting/disconnecting it but it seems to be stuck open. I ended up
just puttin
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