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Central pneumatic model #67847 trips reset every 11 seconds, motor not hot

My Central Pneumatic 21 gal up ight air compressor will run for 11 seconds then trips the reset button. Motor is not getting hot. Is there an easy fix?

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Posted on Jan 02, 2017

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SOURCE: central pneumatic 2 hp 4 gal air compressor has

can you please tell me where are the leak found as there are different place with dif temp seal

Posted on Sep 27, 2009

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manhandy
  • 146 Answers

SOURCE: can't find air filter for central pneumatic air compressor

i do not know which one you taking about! the Air intake or in line moisture type on the discharge.
but both are universal just go to air compressor shop or go on line.

Posted on Jul 05, 2009

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SOURCE: what type of oil for central pneumatic air

It should use 30 weight mineral oil, or 30 weight motor oil.

Posted on Aug 06, 2009

lindsay836
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SOURCE: I need parts for a central pneumatic compressor

http://www.harborfreight.com/manuals/93000-93999/93785.pdf
That should be it, please let me know.

Posted on Feb 06, 2010

  • 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

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1 Answer

Have a 21 gal central pneumatic. 2.5 hp. With no pressure in tank, plugged into wall outlet. Upon start up it will run 20 seconds then the breaker on motor case trips. Barely used this thing.


the thermal circuit breaker is overloading
that can be from a faulty tcb or a problem in the compressor ( seized)
most need start/run capacitors for the motor to start and if it / they are faulty then that will blow the TCB
if it has 2 capacitors ( one for start which it is doing and the other for run then that capacitor may be the problem
if it has the one unit with 4 wires , replace the capacitor
suggest that get an electrician in to check out the unit

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Could be piston rings too. Have you looked here? http://www.centralpneumaticaircompressors.com/buying-central-pneumatic-air-compressor-parts/

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Use soapy water to check for air leaks. Can also check piston ring and valves. Make sure engine is driving the compressor.

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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.

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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, 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)

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1 Answer

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i'm not sure of the solution but what type of oil did you use?

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