D55146 (Type 1) DeWALT Compressor - Overview

Diagrams for D55146

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Ball Valve – Part Number: N072023
$22.04
Special Order
Ball Valve
Part #N072023
This genuine OEM replacement drain valve is designed for use with a variety of DeWalt air compressors. Made from durable metal, it allows you to easily open or close the valve with just a quarter turn, making tank draining quick and hassle-free. If your current valve is leaking or hard to turn, this part is a simple fix to keep your compressor running efficiently. It’s sold individually, and installation is straightforward—just be sure to check your model’s manual for proper fit and instructions.
Screw – Part Number: A08454
$7.44
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Screw
Part #A08454
Screw – Part Number: A10638
$7.44
Special Order
Screw
Part #A10638
Nipple 1/4-18NPT X 1 – Part Number: N044990
No Longer Available
Nipple 1/4-18NPT X 1
Part #N044990
Fitting – Part Number: A03008
$9.51
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Fitting
Part #A03008
Spring – Part Number: A20723
No Longer Available
Spring
Part #A20723
Cylinder Sleeve – Part Number: N021725
$51.68
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Cylinder Sleeve
Part #N021725
This part is made of metal and is available as an individual replacement. The cylinder sleeve goes next to the o-ring and the valve plate. During replacement, it may require a wrench to help install this item correctly. It will need to be replaced if it becomes broken. This is a genuine OEM sourced part which is specially designed for use with compressors made by DeWALT, Black & Decker, and Bostitch.
Manifold Regulator Assembly – Part Number: N028208
$345.86
Special Order
Manifold Regulator Assembly
Part #N028208
This is a genuine manufacturer sourced replacement regulator/manifold for air compressors. This part adjusts the pressure of the air coming from the tank to the desired level. Includes regulator body, two (2) gauges, two (2) brass quick connect fittings and a regulator knob. Make sure to unplug the air compressor release all the air from the tank before installing this part.
Connecting Rod And Piston Asse – Part Number: N038785
$102.05
In Stock
Connecting Rod And Piston Asse
Part #N038785
This genuine OEM replacement kit is designed for use with select DeWalt air compressors and includes the most commonly needed parts to fix low compression issues. The kit comes with a cylinder tube, valve plate O-rings, and a complete piston assembly with bearing—everything you need to restore performance. Please note: This kit does not include the valve plate, head gaskets, or other compressor components. If your compressor is losing power or not building pressure properly, this kit may be the solution. To install, you’ll need a screwdriver and a wrench, and it’s always a good idea to refer to your model’s manual for step-by-step instructions and compatibility.
Regulator Bonnet – Part Number: N148120SV
$8.49
Special Order
Regulator Bonnet
Part #N148120SV
This is a genuine manufacturer approved replacement regulator bonnet designed for use with air compressors. This is an important part of the regulator which helps to adjusts the pressure of the air coming from the tank to the desired level. It is made out of plastic and it is sold individually.
Warning Label – Part Number: N021116
$7.44
Special Order
Warning Label
Part #N021116
Warning Label – Part Number: N018445
$7.44
Special Order
Warning Label
Part #N018445

Common Symptoms of the D55146

How this model fails, and the parts that fix it.

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Can't find this special screw used on many housings etc
4 of 6 people found this instruction helpful.
  • Tim from Tucson, AZ
  • Very Easy
  • 15 - 30 mins
Actually don't like using Torx bits because they are hard to center deep in the channel. I had misplaced these forcing me to order replacements.
My plan is to insert Torx bits before screwing in and using jb weld to secure the bit to the screw, giving me a hex head. Can't find this special screw with a hex head. This screw is called AGC-408 by craftsman.
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Older compressor runs but no longer builds pressure
3 of 3 people found this instruction helpful.
  • Cary from SAGLE, ID
  • Really Easy
  • 30 - 60 mins
  • Screw drivers, Socket set
After replacing the piston, cylinder sleeve and O-rings, the old compressor works like a champ. The hardest part was getting the nut loose holding the piston & bearing in place. Two socket wrenches and a big hammer was able to break the nut loose and get it off.
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Broken ground on original plug
2 of 2 people found this instruction helpful.
  • Debra from PRESCOTT VLY, AZ
  • Really Easy
  • 15 - 30 mins
  • Screw drivers
Removed cover & old cord.
Replaced with new cord & replaced cover.
Works perfect.
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