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Have dewalt D55146 air compressor leaking out of air pressure adjustment knob. What needs to be done? dgutierrez@versitech.com

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First make sure the knob is turned fully clockwise (closed) and see if the leak stops, if it doesn't, the easiest thing to do is to buy the valve and replace it, it is difficult to near impossible to find parts for this valve.

Posted on Mar 22, 2011

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I have the same issue and so do many other people. Dewalt does not care about the customer at all. they wan tyou to buy the complete manifold for 110.00 and i am not doing that. trust John Trevino idea. it will work and u will much happier. I am trying to return mine today.

John Trevino
1173 solutionsNov 07, 2011
May not need to remove the manafold. Order regulator repair kit number (N008792) and try to repair in-place. If the knob is stripped, do not repair. Remove the knob and examine parts before you order kit. For a temp repair, remove the jumper hose that feeds the manafold and plug. Remove the safety pop valve and install a tee fitting. On one port of the tee, re-install the pop valve. On the second port install quick connect fitting for full tank pressure or generic regulator then quick connect. Generic regulator is sold at Lowes and will last longer then factory part (manafold costs about $75). Good luck

Posted on Feb 21, 2013

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1 Answer

Air is leaking from regulator knob on my d55146 compressor. will a regulator rebuild kit fix it or do i need a hole new regulator?


Yes. A rebuild kit will include all seals and o-rings needed.
This project is best handled at a service center...Reason being that the rebuild requires making sure that all seal surfaces are a clean machine surface to properly reseat and seal..

Apr 20, 2013 | Dewalt D55146 1.8 HP Continuous, 200 PSI,...

1 Answer

Dewalt d55146 wont start


Not that I am aware of. The cord should go into a control box where the on off switch is. The motor wires come from that to the motor. I would check the switch box and more importantly the cover. The cover contains the plastic knob that turns the switch on and off. If the knob gets messed up it may not work correctly. The cover is available by itself. Here is a diagram with the part numbers.

DeWalt D55146 diagram

Aug 20, 2012 | Dewalt Air Tools & Compressors

2 Answers

Compressor regulator is hard to remove.


May not need to remove the manafold. Order regulator repair kit number (N008792) and try to repair in-place. If the knob is stripped, do not repair. Remove the knob and examine parts before you order kit. For a temp repair, remove the jumper hose that feeds the manafold and plug. Remove the safety pop valve and install a tee fitting. On one port of the tee, re-install the pop valve. On the second port install quick connect fitting for full tank pressure or generic regulator then quick connect. Generic regulator is sold at Lowes and will last longer then factory part (manafold costs about $75). Good luck

Nov 07, 2011 | Dewalt D55146 Heavy Duty 412Gallon 200PSI...

2 Answers

My regulator on my compressor keeps leaking from the top. When I turn on compressor it just keeps filling up in the regulator maxes out at 200psi and blows the safety valve. model D55146 type 2


Hello. W/D here.
Check the rating tag on the safety valve that is letting the pressure off of the tank. I'm pretty sure that it is less than the 200 psi that you are seeing.
What I believe is that the contacts in the pressure switch are either set too high, or the switch is bad. Check the rating for your switch, it's kick in (on) and kick out (off) pressures. If you have these values, you can set the switch yourself. Pump the pressure up to where you want it to kick out (off) and stop the compressor at that pressure by pulling the plug. Remove the contacts cover and adjust the spring until the contacts part, setting the contacts to the actual pressure. Drain the air down to below the kick in point. Replace the cap over the contacts, and turn the compressor back on. It should kick off at the pressure that you dialed in.
If the contacts will not set, or if there is too much carbon on the contacts, or if you note any burned wires or melted terminals, replace the switch. Minor carbon on the points can be removed with an emery board or fine sandpaper, and this should be regarded as a temporary fix.
Best regards, --W/D--

Feb 19, 2011 | Dewalt D55146 Factory Reconditioned 4.5...

1 Answer

Won't go past 60 PSI


Return it as a valve is stuck / not seating.

Mar 05, 2010 | Dewalt D55146 Factory Reconditioned 4.5...

1 Answer

Compressor question


i have that compressor and had that problem. i build professionally so i use it alot. i had it about a year before the regulator quit working which is what yours is doing. i put it back in the box and took it back to lowes


please rate answer

Feb 01, 2009 | Dewalt D55146 Factory Reconditioned 4.5...

1 Answer

Which part to replace?


You need to replace the regulator (pressure adjustment assembly.)
You can find the part number by searching on the DeWalt web site. It's important to know not only the model number but also the type number of your compressor; the type number is which version of the compressor you have.

Jan 13, 2009 | Dewalt d55151 factory reconditioned emglo...

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