Model # D55684 TYPE 1 Official DeWalt air compressor

Here are the diagrams and repair parts for Official DeWalt D55684-TYPE-1 air compressor, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

Click a diagram to see the parts shown on that diagram.
In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 200 parts |

#415

Engine 2 diagram

Gasket

Part #285814-27

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

#33

Frame diagram

Dewalt hose

Part #5140117-86

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

#515

Engine 3 diagram

Dewalt label

Part #285817-85

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

#538

Engine 2 diagram

Part #285817-09

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

#45

Frame diagram

Dewalt belt guard

Part #A09531

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

#442

Engine 2 diagram

Plate assembly

Part #285814-92

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

Dewalt Air Compressor Unloader Valve Connector 5140142-73

#23

Frame diagram

Dewalt air compressor unloader valve connector

Part #5140142-73

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

#420

Starter diagram

Dewalt switch assembly

Part #285820-65

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

#540

Engine 2 diagram

Nozzle

Part #285817-15

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

#422

Starter diagram

Case cover

Part #285814-41

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.

View all

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

Main cause: bad check valve…

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…

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

Main cause: faulty output air pressure regulator…

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

Main cause: bad air tank pressure gauge…

Why does my air compressor safety valve keep popping open?

Main causes: bad safety valve, pressure switch failure…

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…

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…

Why is my air compressor not turning on?

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

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.

View all

How to replace an air compressor check valve

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

Repair difficulty

Time required

15 minutes or less

How to replace an air compressor pressure switch

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

Repair difficulty

Time required

45 minutes or less

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. …

Repair difficulty

Time required

45 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.

View all

Model # D55684 TYPE 1 Official DeWalt air compressor

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Most common symptoms to help you fix your air compressors

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

Why won't my air compressor build tank pressure?

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

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

Why does my air compressor safety valve keep popping open?

Why does air leak from my air compressor?

Why won't my air compressor tank hold air?

Why is my air compressor not turning on?

Most common repair guides to help fix your air compressors

How to replace an air compressor check valve

How to replace an air compressor pressure switch

How to rebuild an air compressor pump

Effective articles & videos to help repair your air compressors

How to reduce air compressor noise

The unseen dangers of air compressors

How to maintain an oil-free air compressor

Parts & More

Stay Connected

Quick links

Let us help you

More resources