Central pneumatic 40400

Need a manual for a Central pneumatic 40400. Can anyone help?

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Central pneumatic 40400

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Oct 24, 2011
 central pneumatic 40400
by: chuck

motor start/run capacitor is bad but part number/ value label is missing

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Find out where your local Harbor Freight sends their air compressor warranty work. That shop should be able to help you.
B.
Oct 16, 2011
 Need Pressure Switch
by: Randall

Where can I find a pressure switch for a CP air compressor model #40400

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Harbor Freight sells the compressors. Logic would suggest they sell the pressure switches. However, look at the brand on the switch. You may find that it's the same switch as on many other compressors, so you can pick one up at any of those outlets too.
Jul 05, 2010
 Compressor 40400 will not start
by: Gerry

I ran my compressor 40400 yesterday. Today it would not start. It has power to it and through the switch, I acn't find prob. Thank you, for helping me.

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Bill says...

Gerry, if you are getting power to the pressure switch, and then you have checked and you are getting full voltage through the switch, indicating that the pressure in the tank is at or below the cut in pressure level and the pressure switch has tripped, then power is getting to the motor.

When you turn the compressor on, does anything happen at all... any click, any noise?

If nothing happens at all, and power is getting to the start capacitor on the motor, then I'd be checking that or the motor itself.

Cheers,

Bill
Jul 03, 2010
 Air Leaking from the Air Pressure Switch
by: Luis, L.

My compressor was working fine but lately it was not building pressure and I could hear an air leak coming from the Air Pressure Switch. I have not taken the switch apart to see what is wrong. Has anybody experience this problem? Is there anything that I can accomplish by taking this switch apart?

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Bill says...

Luis, have a look at this page on on leaking pressure switches.

Regards,

Bill
Jun 06, 2010
 Motor lugs down
by: Sky

When I start the 40400 compressor it runs normally at a high speed for a few moments, but when the pressure reads about 18 PSI it starts to lug down and sometimes quits. The motor no longer just stops clean, it seems to be drawing lots of electricity (based on my dimmer lights) and sounds like the motor is under a heavy load. I was concerned that I would smoke the motor so unplugged it. About 30 seconds later I hear something like a valve move. I plugged it back in and the same thing happened again.
Any idea what the problem is? As it is I cannot use the compressor.
Thanks Sky
Jun 02, 2010
 Oil leak
by: Anonymous

I am noting oil leaking onto the tank and it appears to be coming from the motor drive. Are there troubleshooting tips for this?
Thanks
Jim

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Jim, mine is leaking too. It's a seal replacement issue, I'm sure. In my case, I just make sure the level of oil in the sump is as it should be, and wipe off the housing as necessary. I don't feel like spending any money repairing the leak.

Of course, if it's bad enough, it's time to take it to the shop.
Dec 21, 2009
 Central Pneumatics Compressor #40400
by: Mike Nickerson

here is a link directly to the Manual you want
Central Pneumatics Compressor #40400 Manual
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Mike...

Thanks very much. A great help.

Cheers,

Bill

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