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I have bambi bb24v silent compressor the pressure sets to required but cuts down very early quite annoying pls tell me how to adjust the pressure so that it does not restart too quickly

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I have a Dewault D55141 air compressor that runs to 150 lbs of pressure and blows the valve and releases air. I read your reply to same problem about cut out pressure adjustment


Looking at your manual, instead of the actual item since I don't have one, I see 312, 329 and 314. It is possible that 312 the switch is shorted causing the pump to run to pop off and beyond. Item 14 is the pop off valve and if the numbers indicate anything, it is a 175 PSI pop off and is going off early. The switch doesn't have any indication of pressure rating.

The screw and bracket that mounts on the switch may be a pressure adjustment but hard to tell remotely.

Some units like this don't have adjustments, they just pump to a predetermined pressure and stop, being determined by the pressure switch and if the switch fails, a pop off will prevent over-pressuring the tank or system.

If you determine that the screw and bracket do not make an adjustable pressure switch, replace the switch with a like on or one that you can adjust in the range you need. Also if the pop off is going off early, replace or if possible, clean it, they can become dirty with rust.

Is possible that the screw fell out of the pressure switch rendering it "broken" until you put it back in....

Nov 04, 2012 | Dewalt & 2HP Hand Carry Heavy Duty...

1 Answer

Bostitch CPACK300 Motor won't cut off!


First; most repair centers, mine included, are reluctant to instruct users on how to adjust compressor settings because of the dangers of setting levels to high and risking tank ruptures. 15 to 20 psi is considered explosive pressures so when you are dealing with 135 to 150 psi or higher, you have to be able to understand and respect the dangers.
Second; if your compressor was working properly and now isn't and no one changed the setting of the pressure switch, it is more likely you need to replace the switch. If the spring or other mechanisms that controls the pressure the switch turns the motor off and on are damaged or broken they need to be replaced.
Lastly; at your own risk, most pressure switches have directions inside the cover on how to adjust the cut-in and cut-out pressures. I have never seen one that requires special tools, usually a screw driver or nut drive will turn the adjustment screw. When adjusting the screw, turn the screw in half turn steps and cycle the motor at least twice between adjustments to check where the switch is cutting in and out. If your switch does in fact require a special tool you will have to see if it is something the repair center can sell you or take/ship the compressor to them for repair.

Oct 08, 2012 | Stanley Bostitch CPACK300 3-Tool Finish &...

1 Answer

I have a porter cable 6 gallon compressor. The motor used to cut out at 150 psi, but now it cuts out at 135. Is this a faulty tank pressure gauge misreading the pressure or a motor cutting out too early


it could be your air pressure adjustment knob, where your air line hooks up, which controls the psi to a lower or highist seting to adjust for different tools and uses.

Aug 26, 2012 | Porter Cable C2002 6 Gallon 2 Compressor

1 Answer

How do i adjust air pressure cut out


Square d recommends that the pressure switch be adjusted to specifications of the particular switch (which is sold in pressure ranges preset at the factory). The switch will be erratic it adjusted out of the factory setting range.
From Square D: (adjust the desired cut-in pressure first, then cut-out)
Cut-in: The large spring controls the cut-in pressure. To make adjustments, turn the nut clockwise (compressing the spring) to raise the cut-in point or counterclockwise to lower the point of cut-in.
Cut-out: The small spring is the differential adjustment and controls the cut-out pressure. To raise the cut-out pressure turn the small nut clockwise (more differential); to lower the cut-out pressure turn counterclockwise.

Sep 24, 2010 | Square D 9013FHG14J52M1X Air Compressor...

1 Answer

I have a Husky Pro 30 gal a/c. How do I adjust


The adjustment for "Cut-In" and "Cut Out" can be found under the pressure switch cover, if available. Some switches are sealed to prevent tampering that might compromise safety.
If you remove the cover you will see the four electrical connections and one or two screws with springs under them. Most times if the adjustments are accessible you will find a set of instructions under the switch cover. One screw will adjust both the "Cut-In/Cut-Out" pressure and one to adjust the "Cut-Out" pressure only.

However you need to remember some important issues regarding these adjustments. The first is that the "Cut-In/Cut-Out" pressure is set at the factory and is set there for a reason. The only reason to change these is because over time the adjustments can change or you are installing a new switch. The other thing to remember is that the safety relief valve is set just above the "Cut-Out" psi. So any meaningful increase will only trigger the safety valve.

If you need to readjust your compressor back to factory settings make sure you do it with small adjustments. 1/4 to 1/2 turn of the screws. Run the compressor and check both the "Cut-In" and "Cut Out" psi setting before making another adjustment.

Hope this helps, good luck and please be careful.

Dec 12, 2009 | Air Tools & Compressors

1 Answer

How to test a pressure sensor switch on a air compressor


Hi, W/D here.

To accurately test a switch, it has to be removed from the compressor and tested by raising the pressure and lowering it with air supplied from a known, good regulator. The trip pressures are then noted and adjusted.
The quick and dirty way of "getting close enough" is a little different. Start the compressor, and when it gets to your desired cutoff pressure, pull the plug. Adjust the HP spring untill the contacts trip out. Now, with the compressor still unplugged, drain the pressure off of the tank until you reach your desired cut in pressure, and close the valve. Adjust either the LP cut in or the differential pressure adjustment to set the cut in pressure. The contacts will pull in. If you adjust the cut in pressure with the diff pressure setting, the cut out pressure has to be challenged and set again. Whichever method you follow, you always need to check the upper and lower settings after each adjustment.
Best regards, --W/D--

Aug 13, 2009 | Dewalt D55153R Reconditioned 1.1 HP...

1 Answer

COMPRESSOR ONLY GOES UP TO 65 LBS.


this unit should have a pressure switch that cuts the unit off and on with a adjustment to set the cut out .most switches have two adjustment screws.one of them tells the unit to kick on when the pressure is getting low.the other adjustment will raise the pressure to the desired amount.

Jun 16, 2009 | Northern Industrial 2 Hp Twin Tank...

2 Answers

High/low pressure spring settings


Generally, the pressure switch is not adjusted more than once or twice in the life of the compressor since the discharge pressure can be adjusted with pressure regulator. However the life of the compressor can be increased if lower pressure settings are maintained. Your pressure switch was set at the factory to a setting of about 120 - 150. If your cutout pressure is higher than 150 surely lower.
STEP 1: Turn Main Calibration Screw ( center screw with large spring) clockwise to increase pressure and turn counter-clockwise to decrease pressure.

STEP 2: Turn Differential Pressure Screw (small spring) clockwise to decrease cut-in pressure and
turn counter-clockwise to increase cut-in pressure.

Differential Pressure is defined as the difference between cut-out and cut-in pressure. There should be about 7 to 12 psi difference between cut-out and cut-in.
In our shop we rarely adjust more than a couple of turns because these switches are sensitive.
Good Luck and please post again if you have other concerns about your compressor.

Jan 21, 2009 | Campbell Hausfeld 26 - Gallon Air...

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