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Campbell Hausfeld
Air Compressor

Model # EX840300 Official Campbell Hausfeld air compressor

Here are the diagrams and repair parts for Official Campbell Hausfeld EX840300 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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ALL PARTS
Showing 10 of 55 parts  |
Pulley PU009795AV
#20

Compressor diagram

Pulley

Part #PU009795AV

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

Lp Piston FP050061AV
Lp piston

Part #FP050061AV

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

Cap ST075400AV
#25

Compressor diagram

Cap

Part #ST075400AV

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

Gauge GA031900AV
#16

Compressor diagram

Gauge

Part #GA031900AV

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

Screw ST016500AV
#27

Compressor diagram

Screw

Part #ST016500AV

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

Fitting ST072019AV
#11

Compressor diagram

Fitting

Part #ST072019AV

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

Crankshaft FP050043AV
Crankshaft

Part #FP050043AV

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

Assembly Kit FP050044AV
Assembly kit

Part #FP050044AV

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

Oil Seal FP050042AV
#4

Pump assy diagram

Oil seal

Part #FP050042AV

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

Cord EC101100AV
#30

Compressor diagram

Cord

Part #EC101100AV

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

Main cause: bad check valve…

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

Main cause: bad air tank pressure gauge…

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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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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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