Question about Air Tools & Compressors

Open Question

I have a Central Pneumatic 21 gallon compressor. it will not pump up to 125 pounds pressure and will not shut off

Pressure has been less daily and now will only reach 70 pounds. I need the 125 pounds of pressure it originally had.

Posted by Anonymous on

5 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

gaeb7
  • 25 Answers

SOURCE: 25 gallon air compressor wont shut off,changed air regulator

You have a valve plate problem . It could be a slipped "o" ring to a bad reed valve. There are rebuild kits for that purpose. The kits include a valve plate assembly. It covers all the bases. When you look at this area pay attention to the partitions of the head gasket/"o"ring. You may avoid the cost of the kit.

Posted on Feb 25, 2009

  • 1383 Answers

SOURCE: I have a Central Pneumatic,

If air leaks when motor is off, fault most likely in-tank check valve. Follow discharge air line from pump to tank. Brass/steel valve at tank is the check valve. Remove hose to valve and check for leak. Replace as needed. If air is leaking while motor is running fault could be reed valves in head. Faulty reed valves in head, or torn head gaskets will cause very hot discharge air and tank will most likely never fill to shut off (or take a very long time to fill)

Posted on Sep 07, 2010

  • 1274 Answers

SOURCE: 27 gal upright tank, 5

Hi, my name is John. Welcome to FixYa. Yes, its your pressure switch,replace. Thanks for choosing FixYa...John

Posted on Nov 23, 2010

caroldon
  • 17129 Answers

SOURCE: I have a 21 gallon 4hp peak motor Central Pneumatic oil lubricated Model 47065 air compressor and it will not go to over 20 psi and it will just keep running

Possible that there is leak on the system or the piston/rings/cylinder has worn out.Also check for oil within the unit. Check the compression of the cycle and if this is too low it means that there is wear and tear and will require a overhauling and reset.

Posted on Mar 15, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Central pneumatic 61693 problems


Without seeing and being able to do hands-on trouble-shooting I can only make a shot-in-the dark analysis.

I, years ago had a similar situation, and it turned out that my compressor was one which REQUIRED LUBRICATING OIL IN THE CRANKCASE [just like a 4-cycle lawnmower engine].

I had failed to regularly check the oil level and over 4 or 5 years it had "used up" the oil and was beginning to run dry. Dry bearings build additional friction which will cause "drag" and slow the compressor RPM!!!!! That could explain the inability of your compressor to exceed 20 to 30 Psi!

With enough dry running, the bearings within the compressor will eventually totally wear out, and FREEZE-UP, locking the compressor up. Once that happens, the compressor will have to be replaced, OR OVERHAULED, just like you would do with a frozen bearing in a lawnmower engine!!!!!

IF, and I EMPHASIZE IF, RIGHT AWAY you properly lubricate the compressor [IF it uses crankcase oil] you MAY extend the life a little while longer, but that no cold start, and low high pressure capability suggest that the bearing(s) is/are dragging badly already.

If your compressor is an "oil-less" type, then an overhaul or replacement will probably be necessary.

Jan 10, 2015 | Air Tools & Compressors

1 Answer

I have a 21 gallon 4hp peak motor Central Pneumatic oil lubricated Model 47065 air compressor and it will not go to over 20 psi and it will just keep running


Possible that there is leak on the system or the piston/rings/cylinder has worn out.Also check for oil within the unit. Check the compression of the cycle and if this is too low it means that there is wear and tear and will require a overhauling and reset.

Mar 14, 2012 | Air Tools & Compressors

1 Answer

I have central pneumatic 21 gal. air compressor. The unloader valve is broke. The power switch is a fenwai model: fw-10. Where can I buy a new unloader valve?


If you should mean the switch that is pressure controlled that turn the compressor on and off- that is a fairly universal replacement piece, As is the power switch itself

If you needed that specific part, your best bet is Harbor Freight tools who owns the Central Pneumatic domain.

Feb 14, 2012 | Air Tools & Compressors

1 Answer

I have a central pneumatic aircompressor with a 21 gallon tank.It pumps up to 120psi then pops off down to 80psi and goes back to 120psi...back and forth... never stoping...could it be a bad pop-off valve?


I would first find out what pressure the compressor is supposed to shut off at. If it is supposed to shut off at lets say 110 then the pop off valve is doing its job you have to reset the pressure switch so it shuts off less than 120 pounds.

Mar 16, 2011 | Air Tools & Compressors

1 Answer

I have a Central Pneumatic, 21 Gallon, 3HP air compressor. The compressor is exiting air through exthaust port.


If air leaks when motor is off, fault most likely in-tank check valve. Follow discharge air line from pump to tank. Brass/steel valve at tank is the check valve. Remove hose to valve and check for leak. Replace as needed. If air is leaking while motor is running fault could be reed valves in head. Faulty reed valves in head, or torn head gaskets will cause very hot discharge air and tank will most likely never fill to shut off (or take a very long time to fill)

Sep 06, 2010 | Air Tools & Compressors

1 Answer

My husky air compressor is suppose to shut off at at 125psi


Pressure switch may be stuck. May need to adjust pressure switch.

May 27, 2010 | Air Tools & Compressors

1 Answer

25 gallon air compressor wont shut off,changed air regulator


You have a valve plate problem . It could be a slipped "o" ring to a bad reed valve. There are rebuild kits for that purpose. The kits include a valve plate assembly. It covers all the bases. When you look at this area pay attention to the partitions of the head gasket/"o"ring. You may avoid the cost of the kit.

Feb 25, 2009 | Campbell Hausfeld 5 Peak / 1.7 Running HP,...

Not finding what you are looking for?
Air Tools & Compressors Logo

Related Topics:

51 people viewed this question

Ask a Question

Usually answered in minutes!

Top Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1383 Answers

Joe Garcia
Joe Garcia

Level 2 Expert

205 Answers

Brad Brown

Level 3 Expert

15557 Answers

Are you an Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...