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Friggin' Air comperssor won't drain......UUrrgg.....

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Forum topic by Rick Dennington posted 09-20-2013 10:18 PM 1344 views 0 times favorited 57 replies Add to Favorites Watch
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Rick Dennington

3471 posts in 1882 days


09-20-2013 10:18 PM

I have an Ingersol—Rand 36 gal., oil fed, belt drive compressor, and the damn thing won’t drain the water out of the tank…...I unplugged it, bled all the air out of the tank, and I noticed the water was “milky” looking…........Bled everything down to zero, unhooked the air hose, opened the drain cock valve, and nothing…...The tank has water in it, and can’t figure out why it won’t drain…..I’ve done this many times before with no problems…....What’s going on, and how do I get it to drain….?

-- " I started with nothing, and I've still got most of it left".......


57 replies so far

View johnstoneb's profile

johnstoneb

728 posts in 861 days


#1 posted 09-20-2013 10:24 PM

You’ve got crud in the bottom of the tank that has plugged the drain. You’ll probably have to take the drain valve out of the tank and use something to poke into the tank and loosen the crud.

-- Bruce, Boise, ID

View Bill White's profile

Bill White

3496 posts in 2648 days


#2 posted 09-20-2013 10:33 PM

Yep! Take the drain valve out, clean it well, get back to blowin’ stuff. Mine can get a little junk in it too.
Bill

-- bill@magraphics.us

View Rick  Dennington's profile

Rick Dennington

3471 posts in 1882 days


#3 posted 09-20-2013 10:35 PM

Yep…You could be right…..I opened it all the way, and tried to use a small probe to check to see if it was plugged up…It felt like I was still hitting metal….So I didn’t push it any….

-- " I started with nothing, and I've still got most of it left".......

View Rick  Dennington's profile

Rick Dennington

3471 posts in 1882 days


#4 posted 09-20-2013 10:47 PM

The thing is…I can’t even get one drip to come out when the valve is fully opened…...I’m a little concerened that the water is milky-looking…..Just hope it didn’t get any water up in the cylinders…It’s been a while since I changed the oil….Checked it not long ago, and it was full…..

-- " I started with nothing, and I've still got most of it left".......

View johnstoneb's profile

johnstoneb

728 posts in 861 days


#5 posted 09-20-2013 10:59 PM

You’ve got to screw the drain plug out of the tank. Once you get it out you will see why it feels like you are hitting metal with the probe. because you are.

-- Bruce, Boise, ID

View Rick  Dennington's profile

Rick Dennington

3471 posts in 1882 days


#6 posted 09-20-2013 11:11 PM

Yep…...it’ll take that to fix it right…...Hopefully that’ll do it…...”ppreciate it, guys…...I just needed some closure…....lol…....Thanks….......!!!!!!!!!!!!!!!!!

-- " I started with nothing, and I've still got most of it left".......

View ajosephg's profile

ajosephg

1854 posts in 2249 days


#7 posted 09-20-2013 11:24 PM

Hi Rick
I think the milky looking water is nothing to worry about. It’s just water mixed with the oil blow-by from the compressor. Like when water gets into the crankcase of a gas engine.

BTW, I drove by your town earlier this week, but was on a mission and couldn’t stop. :)

-- Joe

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Rick Dennington

3471 posts in 1882 days


#8 posted 09-20-2013 11:31 PM

Thanks, Joe….I figured it was something to not worry about…the compressor runs fine, and has 135 PSI…...It just needs a good draining…..Sorry I missed you….but I would have anyway, as we were down in Texas, and just got back a couple of days ago…....Maybe next time….........!!!!!!!!!!!!!

-- " I started with nothing, and I've still got most of it left".......

View b2rtch's profile

b2rtch

4341 posts in 1736 days


#9 posted 09-20-2013 11:54 PM

the drain is full of rust, remove it and clean it

-- Bert

View ajosephg's profile

ajosephg

1854 posts in 2249 days


#10 posted 09-20-2013 11:59 PM

One of these days we’ll cross paths.

BTW – the way the drain cock is constructed prevents pushing a probe through it. As the other folks has said, you gotta remove it. You might put in an elbow and a short piece of pipe, etc. to make it easier to drain. Our old bones make it difficult to reach under the tank.

-- Joe

View Dallas's profile

Dallas

3042 posts in 1175 days


#11 posted 09-21-2013 12:34 AM

Open it, fire it up, let it blow out the crud.

That is what happens in auto repair shops every day.

Why over think it?

-- Improvise.... Adapt...... Overcome!

View Rick  Dennington's profile

Rick Dennington

3471 posts in 1882 days


#12 posted 09-21-2013 12:36 AM

Thanks, Bert......Yea, that sucker is locked tighter than Dick’s hatband…...I got to go catch some fish tomorrow, so it’ll prolly be Sunday before I get on it…...’ppreciate it…....

Good point, Dallas…...

-- " I started with nothing, and I've still got most of it left".......

View gfadvm's profile

gfadvm

11234 posts in 1378 days


#13 posted 09-21-2013 12:46 AM

Have you tried opening the drain with the tank fully pressurized? Might blow the obstruction out. I think that is what Dallas said.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Shawn Masterson's profile

Shawn Masterson

1262 posts in 636 days


#14 posted 09-21-2013 03:19 AM

DO NOT REMOVE THE DRAIN COCK UNDER PRESSURE!!!!!!!!!!!!!!!!!!!!!!

Bleed off the pressure completely remove the drain cock and throw it in the trash. take a probe and poke around in the tank carefully so you don’t damage the threads. now turn on the compressor and let it blow out the crap. cover the floor it will be nasty. Now go to the local hardware store and buy a 1/4” street 90, a 1/4”x 8” nipple and a 1/4” ball valve. Use those parts to replace the factory drain, so this never happens. also this makes it easier to drain the compressor so you are more likely to do it more often.

View C_PLUS_Woodworker's profile

C_PLUS_Woodworker

493 posts in 1595 days


#15 posted 09-21-2013 04:18 AM

Hi Rick…..

I just barely (yesterday) finished rebuilding the motor and pump on my compressor.

I had to learn a lot because this was all new to me.

I talked to several guys that I knew did know their stuff about compressors.

I think all the posts above about removing the entire drain plug are right on.

Re: Milky looking water:

I learned a few little tips…………

Oil could only come from the compressor rings, so keep a close eye on the oil level in your compressor. If it starts to use too much it will be time for an overhaul

Two other things to check before condemning the rings ………..first make certain that the crankcase breather is not plugged,

And secondly ……….that it is not over-filled.

Both of those situations can force the oil past the rings due to excessive pressure in the crankcase.

Maybe try different oil. Most compressor pumps recommend using a non-detergent oil. Synthetic is good, but it’s hard to find a non-detergent synthetic oil unless you buy one specifically made for compressors.

Too light of oil can also be a factor in blow-by

Just my $.02

Best to you and yours.

Bruce.

-- We must all walk our own green mile

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