On Tue, 06 Dec 2011 14:10:13 -0600, Tim Wescott
wrote:

On Tue, 06 Dec 2011 13:21:13 -0600, Pete Keillor wrote:

On Tue, 06 Dec 2011 12:55:44 -0600, Ignoramus12217
wrote:

On 2011-12-06, Tim Wescott wrote:
On Tue, 06 Dec 2011 11:32:55 -0600, Ignoramus12217 wrote:

On 2011-12-06, Tim Wescott wrote:
On Mon, 21 Nov 2011 00:51:27 -0600, Tim Wescott wrote:

More accurately: would it be worth anything if it's not broken,
worn out, or otherwise trashed, and how likely is it to have
problems that won't show up immediately?

Nameplate says "Emerson". I'd be using it mostly for filling tires
and painting model airplanes.

http://portland.craigslist.org/clc/tls/2700954509.html

Update:

When I bought it I made sure that it got plugged in and came up to
pressure. What I _didn't_ do was bleed off some air and make sure
it started again -- which it doesn't. It tries, but the thing don't
turn. I thought "this thing needs a blow-down". Then I heard the
slow leak from the compressor head, deduced the existence of a check
valve, and found the check valve. Presumably it just needs to be
're-checked'.

Oh well.


If it runs and pumps, the rest is fixable.

(If it did not run, it could be fixable also, just not a given) i

Yup. It looks like the check valve is even made to be maintained, so
I may be able to fix it without either total disassembly or buying
replacement parts -- this is a good thing, because the compressor
purchase has inspired purchase of spray guns, hoses, etc. -- I just
need a regulator and to clean up the nice used guns I bought, and I'm
ready to paint.


I do not think that it is the check valve that is the culprit.

i

Unloader stuck?

It's a cheap little compressor, so I'm pretty sure that the "unloader" is
an intentional leak in the compressor head and the check valve.

I respectfully disagree with Iggy, but if the check valve is doing it's
job I may well come to agree with him.
On my home brew set up, the unloader is incorporated in the pressure
switch - 1/4" tube runs from the input side of the check valve to the
side of the switch where a tire valve is pressed open when the switch
turns the motor off. At this point there is a hiss as air is released
from the plumbing between the compressor and the check valve. I can
press the little lever down to release pressure if I switch the motor
off before the tank is up to pressure. Some pressure switches manually
shut off the power by mechanically opening the contacts independent of
pressure.
Gerry :-)}
London, Canada