T-30 pull up the relief valve to get it to run

by Allen
(Missouri)

I have a T-30 30 hp when you start it up in the morning it will take right and run perfect however after that for several cycles you have to go over and pull up the relief valve to get it to run at full speed! And suggestion on what might be wrong?? Can you email at atwennihan@gmail.com with your thoughts

Thanks
Allen

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Jan 29, 2013
30 hp
by: Allen

No we pull the one up on the top off the cylinder head to get it take off.

Jan 28, 2013
Blowdown
by: Carls421

Do you mean the Relief valve in the separator tank? (Where the oil goes)
If so, sounds like the blowdown valve isnt working properly.
When you switch the compressor off, can you hear it "blowdown"? (Release air) does the pressure go down in the separator tank?

Check out the blowdown valve when it has no pressure in it. You may need to service or have it replaced.

Cheers

Carl
_____________
Thank you, Carl.

Bill

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T30 242 water in oil and oil in the unloaded valve

I have had this compressor for 12 yrs. with no problem.I have an old t30 242 that has never been rebuilt, it started getting water in the oil lately and oil spitting out of the unloaded valve. It is home used, so it never really gets to hot except when I use the sand blaster. The shut off pressure is set at 160. A buddy of mine said it was really oil because it is not grey but a greenish color paint pump. What could be the cause?

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IR Type 30 isn't building up pressure.

by Justin
(Ky)

 The model is 253D5

The model is 253D5

A couple weeks ago it was building up pressure to 100PSI then working real hard, then 80psi, then 60psi, and now it's at 50psi and it works really hard. If I hook up just the smaller side it works fine. I've disassembled everything and the oil is clean, cylinder walls look good, and the piston rings are intact. There was of course some carbon buildup, but I cleaned it off. I noticed that 3 of 4 of the reeds are easy to push up, could this be my problem?

The model is 253D5 and it has a newer motor which has been tested and works fine, the pressure switch is also working properly.

_________________
Bill says...

It looks like a 2 stage compressor. Have you checked the intake valve on the line from the first to second pumps?

If it is a two stage, the intake valve on the second stage may be crudded up, and that might be the problem.

Good that you know the motor is OK, as lugging on increasing pressure is an indicator of motor wearing out, or a problem with the run capacitor too.

Cheers,

Bill

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Nov 24, 2011
reply
by: Justin

Yes I have checked the intake valve and it is clean. Do you think it could be the reeds?

__________________

Really hard to tell from here, Justin. Could be, but no way to be sure. The lugging motor is reacting to increasing back-pressure. The back-pressure is slowing the motor, or the run capacitor / motor hasn't the force it normally has to overcome the increasing load.

Things to be checked that you already may have are the check valve into the tank, the intake and high pressure valves on both cylinders, the check valve on the feed between cylinders, load test of motor, run capacitor check, power supply, to name just a few.


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Ingersoll Rand type 30 - compressor requiring a rebuild

by Larry
(New Zealand)

Hi there. Trying to get some information on an old Ingersoll Rand compressor requiring a rebuild.

I.D. tag:
Ingersoll Rand
London
5 & 3 x31/2 Type 30
Compressor
Serial Number T.P. 74769

Is there any other model numbers for this compressor?

Many thanks in anticipation.

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Jul 22, 2013
Compressor model
by: shrirock

The Compressor model is 253. Use Part no. 37123684AS01 for Rebuild

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