Question about Campbell Hausfeld 5HP 20 Gallon Single Stage Cast Iron Air Compressor VS5006

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Pressure switch 120 volt compressor how to bypass pressure switch

How to test pressure switch on 120 volt 5hp compressor module number wl650001aj

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Un-plug the compressor and remove the cover to the pressure switch. Inspect wire connections for burned /discolored wires. If not burned, look for button to manually trip switch (switch has on /off lever, place in on position). Test with ohm meter for continuity. Switch is normally closed and contacts are usually visable to evaluate condition. Some compressors use a very small sealed pressure switch that is also normally closed.

Posted on Oct 26, 2012


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Posted on Jan 02, 2017

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SOURCE: Husky 17gal 5hp compressor will not cut off when

bad pressure switch or it is wired incorrectly replace switch and check the wiring or could be out of adjustment you compressor is made for max 125psi should be a screw to adjust on the pressure switch near where the wires are connected back out counter clockwise to lower and see if that turns it off

Posted on Feb 26, 2009

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SOURCE: remove the bearing on a 5hp 110 volt 28 gallon oil

This is very hard to do but not impossible. The problem is the rod journal is pressed on the motor shaft. You have to remove the coils / rear end of the motor and carefully place the rotor in a vise. Use a steel rod and hammer to gently force the crank off the shaft by hitting crank from rotor side thru vent holes of front motor housing. It will not be easy and you could easily damage shaft, crank or rotor. (but what the heck, it does not work anyway) If your are successful and able to replace bearing, press the crank back on using loctite then drill 1/8" hole thru crank into shaft and drive in a roll pin. Good Luck!

Posted on Oct 18, 2009

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SOURCE: I have a 5hp 16gal. 135 max psi. The compressor

take the power surply cover off and look down the side on the butten at the contacts, id say it isnot the pressur switch itself, and make sure all bolts are tight and check the reeds

Posted on Jul 30, 2010

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SOURCE: The drive belt broken ,

go in 2 any autofactors wit old belt they should have 1 to match

Posted on Aug 03, 2010

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SOURCE: I need to replace the

Hi, my name is John. Welcome to FixYa. Take the belt with you to most any auto parts store and they will match one up for you. Thanks for choosing FixYa...John

Posted on Nov 23, 2010

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AC compressor

Who checked it ? Was it the dealer or a qualified repair shop ? You need to know how it works to test the system . Pressing the A/C button enables the HVAC control module to request A/C compressor engagement and turn ON the A/C button LED. The HVAC control module sends a class 2 message to the PCM for A/C compressor engagement. The PCM will provide a ground for the A/C compressor relay enabling it to close its internal contacts to send battery voltage to the A/C compressor clutch coil. The A/C compressor diode will prevent a voltage spike, resulting from the collapse of the magnetic field of the coil, from entering the vehicle electrical system when the compressor is disengaged. Defrost and Defog mode selections will request A/C operation but not turn ON the A/C LED.
The following conditions must be met in order for the A/C compressor clutch to turn ON:
Ambient air temperature above 1?°C (35?°F).

A/C low pressure switch signal circuit is grounded.

A/C refrigerant pressure sensor parameter is less than 2413 kPa (350 psi).

A/C compressor temperature switch contacts are closed.

PCM receives an A/C request from the HVAC control module.

Engine coolant temperature (ECT) is less than 123?°C (253?°F).

This all happens if the PCM sees the right voltage from low & high pressure switches . Plus the fact that you say the compressor comes on when cold, then shuts off 5 min. down the road . Just off the top of my head I'd say you have a pressure switch problem. Possible
A/C Refrigerant Pressure Sensor The A/C refrigerant pressure sensor is a 3-wire piezoelectric pressure transducer. A 5-volt reference, low reference, and signal circuits enable the sensor to operate. The A/C pressure signal can be between 0-5 volts. When the A/C refrigerant pressure is low, the signal value is near 0 volts. When the A/C refrigerant pressure is high, the signal value is near 5 volts. The PCM converts the voltage signal to a pressure value.
The A/C refrigerant pressure sensor protects the A/C system from operating when an excessively high pressure condition exists. The powertrain control module (PCM) disables the compressor clutch if the A/C pressure is more than 2413 kPa (350 psi). The clutch will be enabled after the pressure decreases to less than 1578 kPa (229 psi).
I would check it myself by finding the A/C compressor clutch relay in the under hood fuse / relay box an take a jumper wire an jump pin 87 & 30 sockets , where the relay plugs into the fuse box . If the clutch engages that part is good an there is a control problem ,not the compressor . If you pull the relay out of the fuse box an look on the bottom you should see four set of numbers , 87- 30 & 85 -86 .May have a fifth one 87a , don't worry about that one . There also be a diagram on the side of the relay . You can find videos on you tube testing relays . I would have it checked at another place too ,
I would

Jun 03, 2016 | GMC 2003 Envoy SLE

1 Answer

Why the heck is my compressor turning on and off, and on and off, and on and off?!

Has the compressor unit been modified?
The compressor motor should be the kind of power it is rated for. If it is a 120 volt compressor motor, the power feed needs to be of 120 volts.
If it is a 240 volt compressor motor, the power feed needs to be 240 volts.
If the compressor says it is 120/240 volts, then that needs to be checked, the wiring diagram given for the voltage applied must be followed.
Wrong voltage to the motor will cause an overcurrent or overload on the motor and cause the motor protection device to short cycle the operation of the motor.

If the above is correct in the compressor wiring, check the pressure switch.
The pressure switch energizes and cuts power to the motor directly. Is the pressure switch contacts staying closed? Is the pressure switch reading the tank pressure? The pressure switch has springs keeping pressure for them to stay closed, in contact, and if the contacts are pitted or defective, intemitent contact may show as a result.
Personaly, I think you have the compressor connected to the wrong voltage.

Oct 05, 2015 | Air Tools & Compressors

1 Answer

Free wiring schematics

You didn't say what type compressor you have and didn't say what voltage.
A 220 volt compressor should use a double pole switch .
A 120 volt compressor only needs a single pole switch'
how to wire pressure switch for compressor YouTube

Aug 24, 2014 | Air Tools & Compressors

1 Answer

Need wiring diagram for switching volts on a century magnetek 5hp air compressor

What is the model number? Most of the Century 5 HP motors are 220 Volt single phase. What did you want to change it to?

Aug 15, 2014 | Air Tools & Compressors

1 Answer

How do i hook my 5hp compressor up direct

By direct, you most likely mean continuous run where the compressor runs to set pressure then a spill valve or unloader will discharge the rest of the air. This can be done with a pilot valve available thru or ebay. Make sure that the thread sizes will work on your compressor. You do not have to remove the pressure switch, however the unloader must unload before the pressure switch setting. For an idea on plumbing, take a look at gas powered compressors or an electric RolAir compressor that has that feature installed. Good luck.

Oct 24, 2012 | Air Tools & Compressors

1 Answer

My compressor builds up to preset pressure just fine. My problem is after the pump shuts off, the air leaks down at the valve on the pressure switch. I have changed pressure switches and still have the...

This switch is only rated for up to 2 HP at 240 volts and 1-1/2 HP at 120 volts. Using 3 phase power, you can go only up to 3 HP. That would not cause the problem that you discuss, but it is an unsafe condition.
Some Square D switches have a small relief valve so that when the compressor reaches pressure, the motor stops and the relief opens and lets pressure out of the compressor cylinder. Does your switch have that and might that be what is "leaking"? I believe that if the compressor is tight that the leak would stop rather quickly.

Dec 11, 2010 | Square D 9013FHG14J52M1X Air Compressor...

1 Answer

I have a 3 phase electrical motor for my air compressor, How would i connect this from the air compressor pressure switch and towards the electrical source 120V? (for low volt)

If the electrical 120 volt source is single phase, the only way to run this motor is with a single phase to three phase converter. Best to sell the three phase motor and obtain a similar horsepower 120 volt single-phase capacitor-start motor (1750 RPM) for the compressor. You would also require a 3-phase pressure switch for use with the 3-phase motor. Hope this helps!

Nov 05, 2010 | Garden

1 Answer

Difficult starting, seems compressor unit has excessive resistance, you can smell the burning, oil level is full

A couple of things to check is to see if the unloader valve is working, there is a copper line that goes to the pressure switch that dumps the air pressure off the pump to allow a start under no load. with the compressor off and the tank up to pressure loosen the fitting on the small copper line to see if there is any pressure there. if there is either the valve is plugged or the small lever under it from the pressure switch is not hitting the valve to unload it. The other suspect is that the start capacitor in the motor is bad. I assume that this is a 220 volt single phase motor. you would best take the motor to a motor shop and have it tested. this is something that I would advise you have a professional do if you are not experienced with motor repair.

Dec 01, 2009 | Ingersoll Rand SS5L5 Ir Electric...

1 Answer

Air compressor w/5hp motor

Assuming that the motor is factory matched to pump, it should be powerful enough to turn the pump. Most problems with motors are related to pressure switch and/or capacitor. The pressure switch could have burned contacts causing low amps to reach the motor. The capacitor should test at least 90% of rated value printed on capacitor. Some volt meters have capacitor check setting. Also this motor at 5 hp must draw lots of amps. The outlet should be rated at least 20 amps and plug the compressor directly into oulet without an extension cord. \
Secondary problem is the in-tank check valve. The check valve should hold in tank pressure without leaking back to the head of the pump. If check valve leaks, replace it with any brand of same thread size. enjoy

Oct 29, 2008 | Air Tools & Compressors

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