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Take a look at the contacts in the pressure switch. They may be burnt or pi=
tted and both legs of power are not making contact at the same time. I had =
this happen both on an air compressor and a well pump.
Brian
Nampa, ID
________________________________
From: Shop-talk <shop-talk-bounces@autox.team.net> on behalf of John T. Bla=
ir <jblair1948@cox.net>
Sent: Tuesday, August 10, 2021 7:23 AM
To: shop-talk@autox.team.net <shop-talk@autox.team.net>
Subject: [Shop-talk] Compressor woos
Hey gang,
I have a Craftsman 5 hp 30 gal compressor that I purchased some time
around '90. Here are the particulars:
Compressor: Model 919.176951
MO-6436
Motor: GE Model 5KCR48SR59W
Part #: C-MO 3013
RPM: 3450
Volt: 230
Amp: 13.1A
Shaft size: 5/8" or 16mm
SCFM @ 40 PSI 11.3
90 PSI 9.3
125 PSI 8.0
Cut In pressure - 100
Cut Out pressure - 125
The other day I was using my nail gun putting up molding around a window
in my family room. All of a sudden the nail gun quit nailing. After check=
ing
the nail gun and not finding anything obviously wrong with it, I went down
into the shop to see if the compressor was on or if I had inadvertently
turned it off (old age, I forget what I just did). Anyway, the switch on t=
he
compressor was in the ON position, but there was only about 40 psi in the
tank. I pulled the compressor's plug and stuck in the 220V recepticle, and
was getting a reading of 0V on both legs. So I go to the circuit breaker
panel and reset the breaker, nothing. So for some reason the breaker has
bit the dirt. I pull the breaker and head off the hardware store for a new
breaker. Put it in and the compressor fires back up, and I finish putting =
the
trim on the window.
Well the next day, I needed the compressor so I turned it on, and I was
working around the shop. The compressor came up to pressure and shut
off. After using the air to clean off the filter on my shop vac, the
compressor went to cut on, but it didn't start. I could hear a humming. I
run over the the compressor, but before I can turn it off, it trips the new
breaker. I pull the saftey shield and try to turn the flywheel to see if t=
he
compressor/motor has frozen. It moved easily, so both compressor and
motor were OK. I turn the compressor back on, and it fires up. After a fe=
w
cycles, I hear the humming again. Again, but the time I can get to it, it
has tripped the breaker. So there is something wrong with the motor.
Anyone have any ideas? I was thinking that it is either a bad spot on the
armature, or a bad start capacitor. If it's the capacitor, why would it st=
art
after I moved the position of the motor a few degrees?
I check with a local shop and they want $200 to put it on their bench! I
think that's a little steep. So I guess I'll open it up and shot gun the s=
tart
capacitor. Is there anything else I should l for while I'm in there?
I do plan on cleaning all the parts while it's apart. I also don't
see any place
to oil the motor. So I'm assuming that it has bearings that are lubricated=
for
live. Or is there something I should do there, oil, grease?
TIA
John
John T. Blair WA4OHZ email: jblair1948@cox.net
Va. Beach, Va Phone: (757) 495-8229
48 TR1800 48 #4 Midget 65 Morgan 4/4 Series V (B1106)
75 Bricklin SV1 (#0887) 77 Spitfire 71 Saab Sonett III
65 Rambler Classic
Morgan: www.team.net/morgan<http://www.team.net/morgan>
Bricklin: www.bricklin.org<http://www.bricklin.org>
If you can read this - Thank a teacher!
If you are reading it in English - Thank a Vet!!
From Dennis Prager - The American Trilogy:
e pluribus Unum, "from many, one."
In God We Trust
Liberty - the power of choosing, thinking, and acting for
oneself; freedom from control or restriction
--
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<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
Take a look at the contacts in the pressure switch. They may be burnt or pi=
tted and both legs of power are not making contact at the same time. I had =
this happen both on an air compressor and a well pump.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
Brian</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
color: rgb(0, 0, 0);">
Nampa, ID</div>
<div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family:Calibri,Helvetica,sans-serif; font-size:12pt; col=
or:rgb(0,0,0)">
<br>
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<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Shop-talk <shop-ta=
lk-bounces@autox.team.net> on behalf of John T. Blair <jblair1948@cox=
.net><br>
<b>Sent:</b> Tuesday, August 10, 2021 7:23 AM<br>
<b>To:</b> shop-talk@autox.team.net <shop-talk@autox.team.net><br>
<b>Subject:</b> [Shop-talk] Compressor woos</font>
<div> </div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
>
<div class=3D"PlainText"><br>
Hey gang,<br>
<br>
I have a Craftsman 5 hp 30 gal compressor that I purchased some time<br>
around '90. Here are the particulars:<br>
<br>
Compressor: Model 919.176951<br>
&nb=
sp; MO-6436<br>
<br>
Motor: GE Model 5KCR48SR59W<br>
Part #: C-MO 3013<br>
RPM: 3450<br>
Volt: 230<br>
Amp: 13.1A<br>
Shaft size: 5/8" or 16mm<br>
<br>
SCFM @ 40 PSI 11.3<br>
&nb=
sp; 90 PSI 9.3<br>
125 PSI &=
nbsp; 8.0<br>
<br>
Cut In pressure - 100<br>
Cut Out pressure - 125<br>
<br>
The other day I was using my nail gun putting up molding around a window<br=
>
in my family room. All of a sudden the nail gun quit nailing. A=
fter checking<br>
the nail gun and not finding anything obviously wrong with it, I went down<=
br>
into the shop to see if the compressor was on or if I had inadvertently<br>
turned it off (old age, I forget what I just did). Anyway, the switch=
on the<br>
compressor was in the ON position, but there was only about 40 psi in the<b=
r>
tank. I pulled the compressor's plug and stuck in the 220V recepticle=
, and<br>
was getting a reading of 0V on both legs. So I go to the circuit brea=
ker<br>
panel and reset the breaker, nothing. So for some reason the breaker =
has<br>
bit the dirt. I pull the breaker and head off the hardware store for =
a new<br>
breaker. Put it in and the compressor fires back up, and I finish put=
ting the<br>
trim on the window.<br>
<br>
Well the next day, I needed the compressor so I turned it on, and I was<br>
working around the shop. The compressor came up to pressure and shut<=
br>
off. After using the air to clean off the filter on my shop vac, the<=
br>
compressor went to cut on, but it didn't start. I could hear a hummin=
g. I<br>
run over the the compressor, but before I can turn it off, it trips the new=
<br>
breaker. I pull the saftey shield and try to turn the flywheel to see=
if the<br>
compressor/motor has frozen. It moved easily, so both compressor and<=
br>
motor were OK. I turn the compressor back on, and it fires up. =
After a few<br>
cycles, I hear the humming again. Again, but the time I can get to it=
, it<br>
has tripped the breaker. So there is something wrong with the motor.<=
br>
<br>
Anyone have any ideas? I was thinking that it is either a bad spot on=
the<br>
armature, or a bad start capacitor. If it's the capacitor, why would =
it start<br>
after I moved the position of the motor a few degrees?<br>
<br>
I check with a local shop and they want $200 to put it on their bench! =
; I<br>
think that's a little steep. So I guess I'll open it up and shot gun =
the start<br>
capacitor. Is there anything else I should l for while I'm in there?<=
br>
<br>
I do plan on cleaning all the parts while it's apart. I also don't <b=
r>
see any place<br>
to oil the motor. So I'm assuming that it has bearings that are lubri=
cated for<br>
live. Or is there something I should do there, oil, grease?<br>
<br>
TIA<br>
<br>
John<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
John T. Blair WA4OHZ email: jblair1948@=
cox.net<br>
Va. Beach, Va &n=
bsp; Phone: (757) 495-8229<br>
<br>
48 TR1800 =
; 48 #4 Midget 65 Morgan 4/4 Series V (B1106)=
<br>
75 Bricklin SV1 (#0887) 77=
Spitfire 71 Saab Sonett III<br>
&nb=
sp; 65 Rambler =
Classic<br>
<br>
Morgan: <a href=3D"http://www.team.net/morgan";>www.team.n=
et/morgan</a><br>
Bricklin: <a href=3D"http://www.bricklin.org";>www.b=
ricklin.org</a><br>
<br>
If you can read this &=
nbsp; - Thank a teacher!<br>
If you are reading it in English - Thank a Vet!!<br>
<br>
From Dennis Prager - The American Trilogy:<br>
e pluribus Unum, "from many, one."=
<br>
In God We Trust<br>
Liberty - the power of cho=
osing, thinking, and acting for<br>
&nb=
sp; oneself; freedom from control=
or restriction<br>
<br>
<br>
<br>
<br>
-- <br>
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ate.html</a><br>
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