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Screw compressor leaks oil out of air intake on shut down

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 1383 Answers

SOURCE: air compressor leaking

The problem that you are having is caused by the in tank check valve not holding the tank pressure. Simple test is to carefully loosen air-hose that feeds air to tank and check for air leaking. Replace check valve if leaking. Generic parts may be used. Enjoy

Posted on Dec 07, 2008

  • 1383 Answers

SOURCE: AIR LEAK ON CRAFTSMAN AIR COMPRESSOR, 3HP,25 GAL, HORIZ TANK

The needle valve that you see is the unloader which releases air pressure from the discharge line after set pressure is obtained. If air continues to leak after the compressor shuts off, the check valve installed in the tank is leaking air out of the tank. Follow the air discharge line from the compressor to the tank. There you will find a brass valve which is the check valve. Simple test is to remove the smaller airline (1/4") from the brass valve and check for air leaking. If leaking remove brass valve and check for debris under the white seat. If you cannot clean the valve, replace with generic check valve from www.grainger.com. It will cost less than factory part. Just order the valve considering the fitting sizes that you need. For exact replacement,( www.sears.com parts). If you sears model # begins with WL then your compressor is made by campbell hausfeld and parts may be ordered from www.chpower.com. Good Luck with you repair and email if you have more questions.

Posted on Mar 21, 2009

webxcreation
  • 4 Answers

SOURCE: Porter cable pancake unit blows air after shut off.

tap on the check valve with a metal object. Its sticking open. The check valve is the brass fitting on top of the tank. When the valve sticks open it emits air from the area of the engine. If that doesn't work (which I would be surprised it doesn't), you'll need to purchase a new check valve. Good Luck!

Posted on Jul 02, 2009

  • 2976 Answers

SOURCE: My rotary screw air compressor model SSREP100H

It's just too hot. Blow out the radiator weekly. There is an oil temp switch that might need replaced but the radiator is the most common problem with screw compressors. You can check the settings in the control panel, where you turn it on and off. It should be set for a high temp of 185°.

Posted on Aug 08, 2009

  • 50 Answers

SOURCE: Craftsman 3 gal., 1.5 hp air compressor: won't

The compressor will not auto shut off until it reaches the preset pressure which is usually around 100-130 psi - your problem is leakage of air from the oil filler cap suggesting that you have a failed internal valve.

Posted on Sep 24, 2009

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1 Answer

Have a old (1950's guessing) westinghouse air compressor. Pumped it to 150 psi, I shut off, air was coming out of air intake and had pressure in the crank case.


replace the non-return valve in the pipe at the tank connection
air out of intake is poor poppet/read valve seating and pressure in the sump is the tank air leaking back and down past the rings
150 psi is excessive and not good for the compressor so adjust it back to 100 -110 psi

Nov 12, 2016 | Air Tools & Compressors

1 Answer

Why does compressor push oil through air filter when it shuts down ?


Minimum pressure check valve is bad. when unit shuts down air pressure goes back thru compressor and pushes oil out the air filter.

Jun 02, 2015 | Ingersoll Rand UP6-20-125 120 Gallon...

1 Answer

Wont build up air presher on ec12


Low pressure ususally caused by faulty reed valves /gaskets in the head. Easy to check. When compressor reaches highest pressure, check for air blowing out of the intake or no or very little suction. If the compressor has reached highest pressure and you still feel very good suction, suspect air leaking out of system. Check all fittngs with soapy water or shut off the compressor and listen carefully for air leaks. Repair as needed. If faulty reed valves, you can make them using feeler gauge material or purchase from www.toolpartsdirect.com

Oct 21, 2011 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

My air compressor with fill up to about 40 psi and then it just shuts itself off


Hi theyankees20...
Sounds like you have a pressure switch problem, it may have gotten out of calibration.
Check to see if your compressor has an adjustable pressure switch. If it does then adjust the screw/nut down (clockwise) to increase your shut off pressure...just go slowly on the adjustment.
I will include a few more things to check also...
-----------------------------------------------------------------------------------------------------------------------------------------------
Here are a few things to check, you may have already checked some of these.

Electricity...Compressors will run best with full 115Vot 15AMP/Or 220V electrical supply from a circuit, over the shortest electrical cord as possible.

Air Leaks..Place your ear close to the compressor and listen for air leaking, if you hear air that is not normal and means you have to locate and repair whatever it is that is leaking.
Check the air unloader valve... The air unloader valve will blown out air when you turned off the compressor, that is normal.
But it should not have air leaking out of it all of the time. If so then it is faulty and in need of repair/replacement.

Valves...If either the intake or exaust valves fail, breaks, or fails to seat, then your compressor will run 24 hours a day and never build up to the correct pressure for shut-off.

Gaskets...Check to see if your gaskets have failed.
You could have a gasket failure between the pistons and you will never know it because it shows no external air leak.
If this situation happens then the air will only cycle between cylinders and never build up the correct air pressure.
One way to check the gasket is remove the air filter, then put your hand over the intake.
If correct then it will **** you hand against the intake.
If the valve or valves have failed then you will feel the air sucking in and blowing out.

Piston Rings and Cylinder...The piston rings could be stuck,broken, or worn and not allowing the correct pressure to build up in your tank.
A worn cylinder will also contribute to the problem of pressure build-up.

Pressure Switch...Check for air leaks at the pressure switch, it has a rubber diaphram that can fail and leak air out of the system.
Please take time to rate me

Aug 29, 2011 | Pacific International Schwinn Hinge...

1 Answer

After running for a few hours it gets hot and shuts down but runs fine every morning


Without more info I will have to give you several things to look at. Typically during the hot months rotary units experience temperature shut downs due to the following. Dirty oil coolers. Blowing them out with air my help some but ideally they need to be washed using a degreaser solution. Location. during the hot months poor air flow/ air removal may let heat from the compressor build up in or under the cover or room. This hot air gets drawn in by the compressor and raises the compressor temperature. The cycle continues until the compressor shuts down on high air temp. Maintenance. Poor maintenance on rotary screw compressors leads to shut downs on high temp, high air temps then play havoc on dryers which causes moisture in the air system. Maintenance items that need replacing regularly ( about 2000 hrs) oil filter, air filter, Depending on type of oil used change 2000 to 8000 hrs, seperator @ 8000 hrs. Also the amont element will cause high temps if bad. It is located where the three oil lines come together. There should be 4 screws that hold the cover on. the cover also has a hose connected to it and located close to the oil cooler. This amont element acts like the thermostat in your car. it lets oil bypass the oil cooler or causes more oil to go thru the cooler. the cooler oil and bypass oil mixes and maintains a certain temp. air end temp should run about 195 F and injected temp about 165 F. hope this helps. if you can give more detailed info I can get you closer to your problem.

Jul 13, 2011 | Air Tools & Compressors

1 Answer

How dose the unloader work on a T30 compresser ? T30 compresser has small air leak sound comming from intake ? Is there a flow chart of how ther air is compressed T30 ?


There is no unloader on a 2340N5 compressor. However there is a pressure switch that cuts the motor on an off. Located inside of the pressure switch is an air bleeder. When the pressure switch is opened the motor is shut off. A small lever in the pressure switch pushes down on the bleeder valve which lets the air on the compressor head to be released. This allows the the compressor to start up freely. There should be some air heard bleeding off at the pressure switch. If air continues to bleed off all the time the tank check valve is leaking.

If air is leaking back thru the compressor an air leak sound coming from around the air filter (intake) you have a valve leaking allowing trapped pressure to escape thru the air filter (Intake).

I would search the web for a flow chart. I have not seen one.

Nov 16, 2010 | Ingersoll Rand Type 30 Reciprocating Air...

4 Answers

When shutting down the compressor, oil comes out intake filter


hi there,
well,if your air compressor was shut off this due to pressure switch w/c auto switch off your compressor,the pressure switch acquired already the cut off pressure.if the pressure goes down the cut in set up reached it will start your compressor
to run.
regarding oil spillage when shutting down check the oil level on the sight glass of crankcase
a red line indicate oil should not exceed on that level line,if the oil exceed try to drain oil.,on the side bottom of engine there is a drain plug.until on limit level .,besure that machine is shut off/breaker is off.have a nice day don't forget to rate me,thank's

Apr 28, 2009 | Ingersoll Rand Type 30 Electric Driven Two...

2 Answers

Porter cable pancake unit blows air after shut off.


those have a reed valve set up you need to pull the head off and you will see two strips of metal that are usually held down with two small screws each the one on intake side most likely you could get a rebuild kit cheap it will only have new reed valves maybe new screws for them a leather ring and a head gasket

Mar 14, 2009 | Porter Cable 18 - Gauge Brad Nailer and...

1 Answer

Compressor spits out oil when unit is stopped


MIGHT CAN HELP. NOT AN I.R. EXPERT BUT KNOW A GOOD BIT ABOUT SCREW COMP. ARE YOU SHUTTING UNIT DOWN SUDDENLY WITH EMERGENCY STOP OR SOMETHING. SOME UNITS DO THIS MORE THAN OTHERS BECAUSE THE WAY THE VALVE CLOSES. BURPING OIL THROUGH THE INTAKE IS ALSO CAUSED BY SUDDEN STOP INSTEAD OF THE UNIT SLOWLY SHUTTING DOWN AND THE OIL IS RUNNING BACK SLOWLY. THE UNIT ACTUALLY TURNS BACKWARDS A LITTLE BIT. YOUR OIL SHOULD NOT COST THAT MUCH. YOU CAN CONTACT ME FOR PARTS AND PRICING ON THE OIL. YOU CAN SAVE ALOT OF MONEY WITH AFTERMARKET SERVICE PARTS AND OIL -THEYRE JUST AS GOOD AS OEM.I WOULDNT USE 30W OIL ! YOUR POOR AIR DELIVERY MAY BE AFFECTED BY WORN PARTS DUE TO LUBRICATION. HOW OLD IS UNIT? MODEL # ? CONTACT ME JBRIDGERS@CA-EQUIP.COM FOR INFO & PRICING. ME AND 1 TECH WOULD PROBABLY COME DOWN AND FIX IT FOR YOU FOR AN ALL EXPENSE TRIP FOR FREE. WE ARE IN NC AND DONT GET OUT ENOUGH.

Jan 20, 2009 | Ingersoll Air Tools & Compressors

5 Answers

40 hp ingersoll rand rotary screw air compressor keep shutting


I have a ingersoll compreesor that keeps shuting down on high discharg air temp

Nov 12, 2008 | Ingersoll Rand Stationary Air Cooled...

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