T-30 / Oil inside crankcase become milky and contaminated with water.

by Lock
(Singapore)

I just bought this Ingersoll-Rand T30 air compressor Model 2475 7.5HP about a month ago. I use it inside my auto workshop. After a week used, I checked the oil and it become milky and have water mix with the oil.


I have call for help and they come to check and clean the crankcase and refill with new oil, since it still in warranty. They checked the piston ring and its good. Since the compressor is still new they said it wasn't caused by the worn piston ring or cylinders. So, they said to wait for another week for result. But after 2 days the oil have change back just like previously which was milky and mixing with water.

The oil they used is specially for that air compressor brand. So there is no issue about not suitable oil.

After a month, they already change the oil about 4 times. But the problem is still there. Bill, any suggestion/solution/explanation for this problem? I don't want to call the repair guys every week. Thanks.
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Hi Lock...

As a comment here, tell me about where you have the compressor installed, the air around it (lots of room or not), the ambient temperature that the compressor is in, how many hours a day it's running, and what the temperature is outside, where I presume the air is coming from that the compressor compresses?

Provide as much info as you can about the conditions around the compressor.

I ask this, as I suspect what you are experiencing is condensation in the sump from temperature fluctuation... maybe! If the rings are good, then air is not bypassing them into the sump, so the only other place water can be coming from is through the oil vent cap... maybe.

Lets talk about it, and maybe some other T-30 users can comment?

As far as I am concerned, IR is very reputable, and their compressors are pretty good.

Cheers,

Bill

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Mar 26, 2012
Same issue
by: Anonymous

I had the same issue with my T-30. After some digging i found the compressor wasn't running long enough to stay warm/hot and would cool down before it started again. This hot/cold is creating condensation in the oil, thus the white milky stuff in the oil. I was using the IR recommended oil, I called a lubrication company, Lubrication Engineering, and they have a oil that will handle the temp change and has eliminated the milky stuff. Hope this helps.
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Why not tell us the name of the oil you are using? Can't hurt, and might help the original poster. And, if you are going to post that, why not include the number or URL for Lubrication Engineering?

Cheers,

Bill

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Ingersol Rand T30 2420d5 wont kick on

by Levon
(Boise ID)

IR T30 2420d5. Compressor only kicks on manually.

Initially it stopped working, I tested (w/parts from a known good compressor) the motor, all the valves, and then finally I found the electrical "starter and relay" was faulty.

I replaced with a new electrical unit, wired it exactly as it was before, and it worked great for a couple runs, then found out that the electrical unit was under rated and burnt out.

Replaced it again, wiring correctly again, and the new, correctly rated electrical unit, only kicks on and builds pressure when pressing and holding the button. Any ideas, possibly another faulty electrical unit or maybe a pressure switch?

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Bill says...

Hi Levon. Boy, your air compressor's been giving you the run around, hasn't it?

From what you have described, I would look to the pressure switch next.

Use your multimeter and see if power is running from the pressure switch to the motor when the tank pressure is below normal cut in, and when you don't have the manual pushed.

If no power, then it's likely the switch.

Cheers,

Bill

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Ingersoll Rand model 2475 7.5 Compressor Popping Noise

by Charles Teague
(Forest City, NC)

Have an Ingersoll Rand model 2475 7.5 hp type 30 recip compressor used in a cabinet shop.

It has begun making a loud popping noise when it nears or reaches the cut out pressure of 175 psi.

Does not make a popping sound at other times but seems to run like it always has.

It is an old unit (10+ years) but it has worked very good until now.

Any ideas?

Had some milky oil recently but drained it and refilled with fresh oil.

Don't think that has anything to do with it. Any help appreciated.

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Feb 05, 2014
popping
by: Doug in s.d.ca

"It has begun making a loud popping noise when it nears or reaches the cut out pressure of 175 psi.

Does not make a popping sound at other times but seems to run like it always has. "

Maybe it is a temperature related thing -
In any event, perhaps the tank is starting to go and the creaking (could that be the word for this?) is metal on metal expansion noise.

Might want to look around the machine to see if paint has chipped off anywhere.

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