Question about Porter Cable Cable 4.5 Gallons 150PSI Job Boss Oil - Free Mobile Air Compressor - C3151

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Leaking air at regulator on porter cable job boss. Air pressure can't build because of air leak . Do I replace the regulator assemply or is there a easier and quiker method to use the existing reg?

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Replace it. Any attempt to repair will not last long enough to make it worth while if you are successful at all. Eric

Posted on Jun 29, 2009

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1 Answer

Why can't i get over 35 lbs on my job boss air compressor?


Check for internal leaks in compressor - compression rings on the cylinder braking often.
Another problem would be fittings or piping leak - usually a simple O-ring replacement will do a job.

May 13, 2014 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

My Porter Cable Job Boss compressor won't shut off. It builds up pressure but just continually runs.


Pressure switch - replace as soon as possible
Overpressure would be possible in that tank - it is dangerous !

Oct 20, 2012 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

Motor runs and and sounds fine but will not build any pressure .


Hello there and thank you for choosing fixya
This is a fairly common problem with these machines normally the seals inside of the air pressure regulator will fail thus leading the machine not able to build up pressure so i would first check there then i would take a spray bottle and add a little amount of dish soap to it and fill it with water and then shake it then spray all of the fittings on the compressor and see if there are any leaks and tighten as needed and lastly check the relief valve to see if it is seated this is done by lifting the relief valve and cleaning out the valve seat then setting it again and spray it down with the soap solution and see if it is leaking when the machine is on if so replace it

Jun 29, 2011 | Porter Cable Cable 4.5 Gallons 150PSI Job...

1 Answer

My compresser build pressure, stopes,then it leakes the air from the electrical box buy the small line comes from the tank to the othank youff/on switch box, goes down to 80 lbs then start again ?


G'day. You have a leaking check valve.This is the valve that is inserted between the compressor pump discharge pipe & the tank.DO NOT try to remove this valve with pressure in the tank.DRAIN ALL AIR FIRST. Some rightangle check valves have a removable hex nut with a valve behind which can be replaced seperatly(in stead of a new check valve assembly). Just to clarify-the check valve is at the tank end of the little hose that the air is leaking from. WARNING-DO NOT REMOVE ANY FITTINGS WITH AIR IN TANK .Hope this was helpfull
Regards Andrew Porrelli

May 11, 2011 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

Leaking air from pressure adjustment valve.


With the system TOTALLY DRAINED, remove the leaking adjuster and look for a small "O" ring. Replace it if it is damaged in any way. A temporary fix would be to carefully wrap 2 turns of teflon tape on the threads and reinstall it.

Jun 13, 2009 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

Drain valve in Porter Cable air compressor


this valve works backwards, you screw it out to stop airflow. If that doesn't work, replace the valve.
David

May 23, 2009 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

Wont pressure up


Check drain plug on bottom of tank, check hose connections on top of tank.

Lugnut61

Jan 14, 2009 | Porter Cable 4 5 Gallons 150PSI Job Boss...

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