"Brian Lawson" wrote in message
...
On Wed, 10 Oct 2007 10:22:14 -0700, wrote:

I was using my portable 110 v Century 135 MIG yesterday. The welder
is about 10 years old and used infrequently (last used about 3 months
ago).

The melt looked like there was no shielding gas. I upped the gas
pressure on the regualtor with no improvement. I could not hear any
gas flowing out of the end of the MIG gun (Tweeco brand). I unscrewed
the nozzle on the MIG gun and could not hear or feel any gas flow. I
shut off the valve on the bottle and pulled the trigger and the
pressure on the gage dropped immediately (leading me to think that
this is not a gas solinoid valve problem).


Should I be able to hear or notice gas flow at the end of the nozzle
or at the gas flow orifices under the nozzle? Suggestions on where/
what to troubleshoot?


Hey Ari,

I'd look for any really really small opening or orifice or tube that
those little tiny spiders can get in to build a web/cocoon. That's
real common on BBQ's and propane refrigerators, for instance.

Brian Lawson,
Bothwell, Ontario.

Darn fine advice. Then there's rubber seals and stuff that just have a
certain life span. This exact case is why I suggest buying a name brand
product. You have a problem, you take it to a service center, you pick it
up, and it runs for another five or ten years.

Your mileage may vary.

Steve