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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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Showing 10 of 55 parts  |
Fitting FP050053AV
#25

Pump assy diagram

Fitting

Part #FP050053AV

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

Drain Cock, 3/8-in ST127700AV
#6

Compressor diagram

Drain cock, 3/8-in

Part #ST127700AV

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

Cylinder FP050065AV
#44

Pump assy diagram

Cylinder

Part #FP050065AV

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

Hp Piston FP050062AV
Hp piston

Part #FP050062AV

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

Bolt Kit FP050051AV
Bolt kit

Part #FP050051AV

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

Oil Cap/o FP050046AV
#6

Pump assy diagram

Oil cap/o

Part #FP050046AV

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

Bolt Kit FP050040AV
Bolt kit

Part #FP050040AV

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

Ring Kit FP050060AV
Ring kit

Part #FP050060AV

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

Cyl. Head FP050054AV
#26

Pump assy diagram

Cyl. head

Part #FP050054AV

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

Exhaust Tube XP050100AP
#10

Compressor diagram

Exhaust tube

Part #XP050100AP

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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