20 Most Recent Dewalt D55154 Heavy-Duty Continuous 4 Gallon Electric Air Compressor with Panel, 1.1 HP, 3400 RPM Questions & Answers

That model does not have brushes. You can see the parts diagram with this link. Detail

If the unloader valve doesn't release the pressure from the compressor it will be hard to start. This is because there will will be pressure inside the compresser. When the tank is full and the compressor shuts off, you should hear a rush of air which is the unloader valve releasing pressure. The unloader is like a one way valve.

if you have to ask this question, you may be better off taking your air compressor to a service agent recommended by the manufacturer and ask them to do this for you. If you try this yourself and make a mistake, you could end up with a more expenseive repair bill.

List of tools and how much air is here: http://www.engineeringtoolbox.com/air-consumption-tools-d_847.html

Bad capacitor (or close to going) when you look on the motor is there a cap on top of it that looks like a dome? if it is still under warranty then call Dewalt and see if they will fix it for you.

https://support.dewalt.com/hc/en-us/articles/360017799818-Why-won-t-my-compressor-power-on-

It has a pressure valve, that's all.

I was facing this exact same issue. My dewalt compressor was spitting milky oil, and then suddenly stopped working but then I found this troubleshooting guide which really solved my issue: https://aircompressorinsider.com/air-compressor-problems-and-solutions/ Your mentioned issues were at somewhere around number 60-65, I dont exactly remember it now :)

you may be using more air that unit can supply. This is a very common error. it is only 5 cfm which is small. Call Whitton Supply Co. or visit our local Oklahoma City showroom (405) 236-5561.

there is not one.

pin has debris /bent and needs lube or retractor needs repair

There is a ground fault in that case. If you are in need to ask this sort of question, I recommend the services of a qualified electrician.

THERE IS NONE

There is no reset button for the compressor, if the compressor won't start check the valve is not open, also check the outlet power, Shut the drain valve at the bottom of the tank if it's open

https://www.manualslib.com/manual/494085/Dewalt-D55168.htmlSpecifncationsMODEL D55168WEIGHT 88 Ibs. (39.92 kg)HEIGHT 41.75" (1060.5mm)WIDTH 19.0" (4826 mm)LENGTH 21.25 (539.8 ram)AIRTANK CAPACITY (GALLONS) 15 Gallon (56.8 fiters)APPROX CUT-_N PRESSURE 160 PSI (1103.2 kPa)APPROX. CUT-OUT PRESSURE 200 PSI (1379.0 kPa)SCFM @ 90 PSI (620.5 kPa_ 5._cant get fixya comment to work so will edit here...The 200/160 are the typical DS55168 settings from factory and meet the 90 psi @ 5.4 cfm rating.Pressures can be adjusted to a MAXIMUM 225/185 with a resulting lower cfm rate.I'm not familiar with "type 9". Likely nothing special just different setting from factory?

sounds like you ran it off level and siexed the pump

What? If it won't shut off when it trips the limit valve. You need to replace the pressure switch.

Valve plate