Mike, I assume from your description that you shut the compressor off during
the week when you are not using it & the pressure bleeds of over the week &
does a cold start when you are ready to work.
I think Iâ??d start by removing the cover from the pressure switch & making
sure there isnâ??t some kind of nest or insect in there. Next, since the
compressor is older, Iâ??d clean the contacts on the switch. It canâ??t hurt
unless you try to do it with power on! If it still behaves the same, with the
pressure below about 100, lightly tap the switch with an insulated handle to
see if something is sticking. If so, either clean & lube it, or just replace
it, theyâ??re not expensive. How does the switch measure pressure, internally
via a pipe fitting or via a small line going to the tank? It wouldnâ??t hurt to
pull the switch & see that there isnâ??t junk in the line.
Good luck.
Peace, Pat
Pat Horne
We support Habitat for Humanity
On Jul 11, 2023, at 3:33 PM, Mike Rambour <lists@dinospider.com> wrote:
 Hi,
Having a problem with my 5hp Champion Advantage compressor. I called TPTools
where I purchased it in 2001 and they were useless, they want to send out a
service rep to fix it ($$$).
The issue its having is first 2 or 3 cycles of the day when its cold, it cycles
normally, comes on at around 120-125PSI and shuts off at 175PSI, after those 2
or 3 cycles it only comes back on at around 15PSI or even lower and it does
this all day until next day. I only work in the garage on weekends but I am in
the bead blasting stage of my restoration so using the compressor heavily those
2 days a week.
They said turn it off and drain all the air, then cycle it back on and listen
for the "Hiss" (their word) when the compressor shuts off and listen for the
hiss and keep doing that until the compressor does not cycle anymore, did I
hear the hiss or not, did the motor hum when trying to restart ? If that is
the case the unloader valve is bad. I do normally hear the hiss, I don't pay
attention EVERY time though and the motor does not hum.
Isn't it just a pressure valve ? this thing is over 20 years old and first
time giving me issues. But they want to send out a tech to diagnose and fix
the issue meaning having to take a day off work and spend $$$ when it should be
simple. I do agree with the guy that I don't want to throw money at the problem
and swap random parts but I don't need a tech, just how to diag which part is
the issue. I am going to be blasting a lot over the weekend.
mike
--
As he stared at her ample bosom, he daydreamed of the dual Skinners Union
carburetors in his vintage Singer, highly functional yet pleasingly formed,
perched prominently on top of the intake manifold, aching for experienced
hands, the small knurled caps of the oil dampeners begging to be inspected
and adjusted as described in chapter seven of the Singer shop manual.
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