Model # 921167500 Official Craftsman air compressor

Here are the diagrams and repair parts for Official Craftsman 921167500 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.

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 22 parts |

Companion Air Compressor Regulator E100308

#48

Compressor diagram

Companion air compressor regulator

Part #E100308

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

Air Compressor Vibration Isolator Pad E100240

#61

Compressor diagram

Air compressor vibration isolator pad

Part #E100240

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

Companion Air Compressor Cooling Fan E100297

#24

Compressor diagram

Companion air compressor cooling fan

Part #E100297

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

#29

Compressor diagram

Air compressor outlet tube kit

Part #E103286

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

#57

Compressor diagram

Bolt

Part #E100332

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

#44

Compressor diagram

Air compressor handle

Part #E103967

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

#58

Compressor diagram

Air compressor drain valve

Part #E101717

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

Companion Air Compressor Quick-connect Hose Coupler E100307

#49

Compressor diagram

Companion air compressor quick-connect hose coupler

Part #E100307

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

#32

Compressor diagram

Air compressor check valve

Part #E101362

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

Companion Air Compressor Air Filter E100435

#65

Compressor diagram

Companion air compressor air filter

Part #E100435

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 does my air compressor safety valve keep popping open?

Main causes: bad safety valve, pressure switch failure…

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

Main cause: bad check valve…

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

Main cause: faulty output air pressure regulator…

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 is my air compressor not turning on?

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

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

Main cause: bad air tank pressure gauge…

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 # 921167500 Official Craftsman air compressor

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Most common symptoms to help you fix your air compressors

Why does my air compressor safety valve keep popping open?

Why won't my air compressor tank hold air?

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

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

Why does air leak from my air compressor?

Why is my air compressor not turning on?

Why won't my air compressor build tank pressure?

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

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