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My model u30h is set to 130 psi on the pressure switch but will only build up 30 psi could I have a bad solenoid

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Posted on Jan 02, 2017

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SOURCE: Will not build up pressure

If this compressor is dry type with no oil needed, then it may have a worn cylinder and/or piston ring. With flashlight in hand, look under cylinder with piston in upper most position. If you see scratches most likely it needs cylinder / piston kit. Not to worry, not too expensive. If you compressor has a crankcase with oil, then you may have problems with valves in the head. Cracked or dirt under headvalves will prevent pressure from building. Finally there may be one or several leaks in the tubing, check leaks with soapy water. enjoy

Posted on Nov 29, 2008

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I have a new 1 hp utiltech pump and a new. Precharged tank with 34 psi in it now. When i prime the pump the pressure goes right to 25 psi and i can hear some water moving . When i open the shut off valve...


The 34 psi of the pressure tank sounds high, but it depends on what the cut-in pressure is set at in the pump pressure switch. Typically the pressure switch is for 20-40 psi or 30-50 psi. To establish what the pre-charge of tank should be , you need to establish what the pressure switch setting are (i.e 20 - 40 psi , etc.) Run the water and watch the pressure gauge and note at what pressure the pump comes on. The pressure tank needs to be pre charged 2 -4 psi below that cut-in pressure. So if the cut-in pressure is say 30 psi, then the tank needs to be pre charged to 28 psi.
To pre charge the pressure tank, turn the pump off. Drain the pressure tank of water to relieve all pressure in the tank. Then check the pressure of the tank at the air valve. Set the pressure to 2 psi below what the cut-in pressure is.
If you adjust the pressure switch, say from 20-40 to 30-50, you will need to go through the procedure of re adjusting the pressure in the tank. I hope this helps....

May 21, 2014 | Plumbing

1 Answer

I have a C2001-WK that does not auto shut off


A regulator controls the pressure in the air line leaving the compressor and does not affect when the compressor turns on or off.

The pressure switch monitors the pressure in the tank and turns the compressor motor on and off when the switch closes or opens in response to changes in the tank pressure. If the compressor does not shut off, it is possible the pressure switch has been set to a pressure level that is higher than the compressor is capable of attaining, thus it does not shut off.

The compressor is capable of developing 150 psi and is noted as having a "120 psi cut-in pressure". When you say it doesn't shut off, does that mean it will generate 150 psi or more of pressure and fails to shut off or it develops less than 150 psi and does not shut off.

If the compressor does not generate 150 psi, then it is probably somewhat worn out and not capable of developing enough pressure to meet the factory high pressure limit. I would try adjusting the pressure switch upper pressure limit down to 130 psi or less (less if the compressor will not develop 130 psi) and see if this solves your problem If it doesn't,

If the compressor will develop 150 psi or more, then try adjusting the high pressure limit to less than 150 psi. If you can't adjust the high pressure limit then the pressure switch is defective and needs to be replaced.

Aug 03, 2012 | Porter Cable Air Tools & Compressors

1 Answer

Porter cable 3hp air compressor 130 psi no model number visible compressor runs builds up pressure and kicks off when the pressure is builded up in the tank// the compressor will not kick kick back on when...


Hi,
Check to see if the switch will kick in if the pressure is released from the hose going to activate it...if so then the problem is the air being trapped between a check valve and the switch in the hose...
I think that is your problem...
There should be a way for the air pressure to change and represent the tank air pressure accurately....
The different compressors all have different ways of checking the air and then allowing it to release as the the tank pressure decreases..

There is a small hole there somewhere that is clogged with dirt and or oil...find that and clean it and you are in business again...

heatman101

Jul 27, 2011 | Porter Cable Air Tools & Compressors

1 Answer

My jet pump has a 20 - 40 pressure switch but won't give any more than 30 psi. Whats wrong?


There are several causes for this to occur.
1. If it is a 20-40 switch right out of the box it may not be set correctly. I have had this happen. If it builds to 30psi and shuts right off without straining to build to 40psi adjust the Cut-Out pressure up to 40psi. There are two different adjustments on a well switch. One for Cut In / Cut Out psi and one for Cut Out psi.
2. Lack of head pressure being built by the pump can be the cause. This can be attributed to the wrong Jetting in the pump. IE: A shallow well jet/venturi on a deep well.
3. The pump may have a bad impeller, but the pump will generally really strain to build pressure and a bad impeller will be loud, like grinding at times.
4. Double check the pre-set pressure in bladder tank also.
RJ

May 28, 2011 | Fairbanks Ace 1 Horsepower Convertible...

1 Answer

What should the fuel pressure be on a 97 lincoln mark8?


30-45 psi for gas, 30-80 psi for diesel, 105-130 psi for natural gas.

May 16, 2011 | 1997 Lincoln Mark VIII

1 Answer

We have a IR UP6 20hp, 200psi, w/intellisys. It will not stay loaded, goes up to 200 then will unload back to 120 then loads back up. Have replaced load and inlet valve/solenoid. We have an identical...


I have a Few questions before trying to answer.Does the pressure go up quickly to 200 psi and down to 120 psi or does the pressure build slowly to 200 psi and slowly down to 120 Psi. Does this unit have a dryer built in or in the system. Are the pressures set correctly on the intellisys. Does this unit have modulation. What mode of operation is unit in.
Pressure building up fast is an indication of an obstruction in the discharge line. It could be a valve positioned wrong or a dryer froze up. If the pressure builds slowly up and down it sounds like the intellisys settings are incorrect. If the unit has modulation and is operating in modulation it sounds like the cash regulator needs adjusting.

Jan 26, 2011 | Ingersoll Rand Stationary Air Cooled...

1 Answer

Pressure in the tank only builds to 30 psi


Bad check valve. But I would check the regulator, by turning it down to about 10 PSI and running it and see if it builds again, if that works then it is the check valve. But from what you are saying I would replace the check valve anyways.

Jun 05, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

2 Answers

What is a/c pressure on a 1999 kenworth when fully charged with a c 15 cat 550 hp tx KIETH.


low side psi will run about 30 psi, hi side pressure will go as high as 350 psi then the pressure switch will kick the engine fan on then drop psi down to 120-150 psi

Jan 15, 2010 | Q-Logic QLE4060C-CK Network Adapter

1 Answer

I have a craftsman 3.5HP 30 Gal compressor (Model


Unless your machine is worn out----it's probably the pressure switch:

A: needs adjustment

B: needs to be replaced

XYZ: head gasket leak,broken line, other air leaks?

Apr 25, 2009 | Craftsman Air Tools & Compressors

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