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DeWalt
Air Compressor

Model # D55146 TYPE 3 Official DeWalt air compressor

Here are the diagrams and repair parts for Official DeWalt D55146-TYPE-3 air compressor, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 75 parts  |
Tube A16998
#40

Main assy diagram

Tube

Part #A16998

The manufacturer no longer makes this part, and there's no substitute part

Label N018445
#51

Main assy diagram

Label

Part #N018445

The manufacturer no longer makes this part, and there's no substitute part

Label N000231
#61

Main assy diagram

Label

Part #N000231

The manufacturer no longer makes this part, and there's no substitute part

Head A12479
#86

Motor assy diagram

Head

Part #A12479

The manufacturer no longer makes this part, and there's no substitute part

Wheel 5140126-81
#46

Main assy diagram

Wheel

Part #5140126-81

The manufacturer no longer makes this part, and there's no substitute part

Label N006525
#56

Main assy diagram

Label

Part #N006525

The manufacturer no longer makes this part, and there's no substitute part

Cordset A12771
#36

Main assy diagram

Cordset

Part #A12771

The manufacturer no longer makes this part, and there's no substitute part

Shroud A14806
#38

Main assy diagram

Shroud

Part #A14806

The manufacturer no longer makes this part, and there's no substitute part

Pin A06906
#7

Main assy diagram

Pin

Part #A06906

The manufacturer no longer makes this part, and there's no substitute part

Pump N099921SV
#37

Main assy diagram

Pump

Part #N099921SV

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your air compressors

Choose a symptom to see related air compressor repairs.

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Why does air leak from my air compressor?

Main causes: loose air tube fitting connections, bad check valve, faulty safety valve, damaged or corroded air tank, bad…

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Why won't my air compressor start with a full air tank?

Main cause: bad check valve…

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Why won't my air compressor build tank pressure?

Main causes: tank drain valve open or leaking air, leaky air tank, bad safety valve, worn pump seals, bad pump valve pla…

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Why won't my air compressor tank hold air?

Main causes: rusted air tank, loose air tube fitting connections, bad check valve, leaky safety valve, bad tank drain va…

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Why does my air compressor safety valve keep popping open?

Main causes: bad safety valve, pressure switch failure…

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Why can't I adjust the output air pressure on my air compressor?

Main cause: faulty output air pressure regulator…

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Why doesn't my air compressor's pressure gauge work?

Main cause: bad air tank pressure gauge…

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Why is my air compressor not turning on?

Main causes: lack of electrical power, check valve failure, bad pressure switch…

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Most common repair guides to help fix your air compressors

These step-by-step repair guides will help you safely fix what’s broken on your air compressor.

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How to replace an air compressor pressure switch

How to replace an air compressor pressure switch

You can replace a broken air compressor pressure switch in about 45 minutes. …

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Repair difficulty
Time required
 45 minutes or less
How to rebuild an air compressor pump

How to rebuild an air compressor pump

If the air compressor won't fill the tank with compressed air, rebuild the pump using these steps in about 45 minutes. …

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Repair difficulty
Time required
 45 minutes or less
How to replace an air compressor check valve

How to replace an air compressor check valve

You can replace a defective air compressor check valve in about 10 minutes.…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your air compressors

Use the advice and tips in these articles and videos to get the most out of your air compressor.

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How to tell if a fuse is blown

How to tell if a fuse is blown

Learn how to tell whether a fuse is blown…

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How to reduce air compressor noise

How to reduce air compressor noise

Find out how to reduce air compressor noise.…

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How to maintain an oil-lubricated air compressor

How to maintain an oil-lubricated air compressor

See how to perform routine maintenance on your oil-lubricated air compressor.…

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