Question about Campbell Hausfeld 5HP 26 Gallon Single Stage Cast Iron Air Compressor - VS5027

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My air compressor is running slower than normal and it won't build pressure above 45 psi even if it runs all day

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Hi mate there could be lots of resons for why it running slow as follows pump unit seizing up i suggest checking oil or replacing oil also check the full load current on the motor with a clamp meter if it is pulling more than 6 amps than what it should on the silver plate on the motor then this could be bearing problems in the motor so basically get a new motor or new compressor

Posted on Aug 08, 2009

  • ollie reece-jones
    ollie reece-jones Aug 09, 2009

    also i forgot to add take the head off and inspect valves e.g. closing fully and opening ok and check the gaskets there will be 2 gaskets check them both and when you take the bolts out just get a rubber mallet and bang around the head to free the gaskets as when they get hot over and over again they start to stick so be very carefull also when takin head off because as soon as you break the gasket there very hard to get hold off uneless you can make them yourself good luck bud

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1 Answer

My ingersoll rand compressor won't get up to set pressure


Hi bryon


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.
Please take time to rate me
Bud
If correct then it will suck 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
Bud

Apr 05, 2013 | Air Tools & Compressors

1 Answer

Won't build top pressure an shut off


It sounds like your pressure switch is not set correctly. It is possible it is set too high for the compressor you have.

Sep 23, 2017 | Ingersoll Rand Ingersoll-Rand 80 gal. Air...

1 Answer

The compressor only builds up pressure to 45 psi and constantly runs. The problem started after it was left on for 2 days straight.


Hi thadlewis....

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

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On my 1996 ss impala what low side pressure should I see on the a/c with the system running


It all depends on the outside (ambient) air temperature. Your A/C low pressure switch is designed to turn the compressor off at 24 Psi. and turn it back on at 45 Psi. Most systems will normally run at between 25 and 40 Psi when the system is running on HIGH blower and "MAX" or "RECIRCULATE". A system that is fully charged may run at 25 Psi when the ambient temperature is 75 Deg. (F) and may run at 40 Psi when the ambient temperature is at 90 Deg. (F). (it can be even higher if ambient temperatures are higher than 90 Degrees.)

To properly diagnose a malfunctioning A/C system, the HIGH side pressure must also be checked. Restrictions in the system can make the low side pressure look normal while the high side pressure is high enough to blow hoses apart. (400+ Psi.)

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1 Answer

My compressor will not go over 20 psi i have a craftsman 921 4 gal 125 psi compressor and it will not build past 20 psi i do not know how to get to the pistons and stuff what do i do?


The problem with compressors not building pressure is usually a bad pressure switch or bad regulator. Does the motor shut off at 20psi or does it continue running and not build pressure? If the motor continues to run with no increase in pressure, the you should go over the machine looking for air leaks from your regulator back all the way to the motor. Any air leak while the compressor is running can cause the pressure to "peak" way before the intended shutoff that it is regulated to.

Mar 01, 2011 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

The air compressor will build air to 45 psi but no futher and regulator is also at 45 psi and no higher and has been running for over4 hours this is a single stage 4 horse 18 gal craftsman modle 919-16418...


when the compressor is running do you hear air blowing off? If so, check the manual blow off valve to see if it stuk open. The regulator controls the pressure check it for leaks

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1 Answer

I Have a 5.5.hp oilfree air compressor that builds air up to 45 lbs an stops building pressure and keeps run.will not shut off


Is you air regulator working? I suspect your reed valves in the head need replacing as they may not be holding pressure over the 45psi that you mentioned, and are allowing the air pressure to defeat them which allows the psi over 45 psi to bleed back into the air compressor cylinder.

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1 Answer

Craftman 3gal/1hp air compressor runs normal, but


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Unit turns on, builds prssure to about 45 psi, and won't go any higher. Continues to run. regulator is set for max line pressure.


Compressor has a bad valve. Needs to be replaced. The owners manual should have a break down of the compressor. Order the head kit.

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