R134a fittings are terrible -- I've had to modify mine so that it
will fit on the high pressure side. The plunger pin was too long and
wouldn't allow the quick-release to lock onto the fitting.
There are adjustable sets around, where the depth of the pin can be
varied to work on any quick-release fitting.
Shouldn't be that hard, but you know how it goes these days.
I suppose there could be the same problem with R12 fittings -- you
may need to shop around until you find one that fits yours.
Peter
On May 24, 2009, at 10:51 PM, Jim Cathey wrote:
I tried to charge the 560 SEL's AC yesterday, and I couldn't
get any sane behavior on the gauges, and no charging. Later
that day I recalled that I'd had the same problem with the
Chicken Wagon, problems that even took me so far as to replace
the compressor with another one. (Unnecessarily, of course.)
I checked, and it _was_ the exact same problem.
And what is that problem, you might say? The (Robinaire)
charging hose wouldn't go on the fitting far enough to
depress the plunger! The barrel diameter on the Blue Point
(Snap-On's cheaper line) gauge set is 0.335", whereas the
fitting on the CW was 0.350", and the SEL was 0.358". Wouldn't
quite fit. The CW I filed down so that the gauge would go on.
On the SEL I tried a lesser charging hose, an Imperial Eastman,
and it went on far enough to work.
None of this is cheap crap stuff, and it is obvious to the
most casual handler that it is all much higher quality than
my Harbor Freight R134a gauge set, but there you go.
Anyway, one can of secret sauce later, and some supplemental
R290, and it was down to 48 degree vent temperatures. I had
to refill my (refillable) R290 torch cylinder a couple of times,
using one of those charge-it-yourself fag fittings that only
really works with a now-banned old-style hamburger gas tank.
(Which I still have and use, filling them myself from a
liquid-feed forklift tank that I run Big Bertha off of, and
that I _can_ get refilled.)
The enviro-nazis sure do make it hard!
-- Jim
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http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
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To Unsubscribe or change delivery options go to:
http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
