Air Filter (Inner) A213938 for Daewoo for Doosan

Category: Air Filters

Product Description

The A213938 inner air filter is vital to your Daewoo or Doosan equipment's two-stage air filtration system. Acting as a secondary filter, it provides an additional layer of protection by capturing fine particles that bypass the primary (outer) filter. 

This prevents harmful contaminants from entering the engine, reducing wear and tear on critical components and ensuring optimal engine performance, fuel efficiency, and longevity. It is designed for compatibility with various Daewoo and Doosan models.

Why are air filters important?

Air filters are crucial for engine health and performance because they:

• Prevent engine wear: They filter out dust, dirt, and other contaminants that can cause abrasive wear on engine components like pistons, cylinders, and valves.  

• Ensure proper combustion: Clean air is essential for efficient combustion of the fuel-air mixture. A dirty air filter restricts airflow, reducing power, poor fuel economy, and increased emissions.  

• Protect sensitive components: They protect sensitive engine components like mass airflow sensors (MAF sensors) from contamination, which can affect engine performance and fuel efficiency.

Product Specifications

Air Filter (Inner) for Daewoo for Doosan

Signs of a Faulty or Damaged Air Filter

• Reduced engine power or sluggish performance.

• Decreased fuel economy or increased fuel consumption.

• Black smoke emitting from the exhaust.

• Engine misfires, rough idling, or vibrations.

• Difficulty starting the engine.

• Unusual whistling or hissing noises from the air intake.

• Check engine light illumination (in some severe cases).

• Excessively dirty outer filter requiring frequent replacement.

• Visible dirt, debris, or damage on the inner filter (upon inspection).

Recommended Use/Applications

• For Daewoo and Doosan heavy equipment with two-stage air filtration.

• Primarily used in forklifts, construction equipment, and material handling machinery.

• Provides secondary filtration against fine dust and debris.

Frequently Asked Questions

What is the Difference Between an Inner and Outer Air Filter?

The outer (primary) filter captures larger particles in a two-stage air filtration system. The inner filter (the secondary or safety filter) provides a second layer of protection, filtering out finer dust and debris that may pass through the outer filter.

Do I Need to Replace the Inner Air Filter Every Time I Replace the Outer Filter?

Generally, no. The inner filter typically has a longer service life than the outer filter. However, it is recommended to inspect the inner filter whenever you replace the outer filter. The inner filter should be replaced if it is visibly dirty or damaged. Some manufacturers recommend replacing both filters at certain intervals for optimal protection.

Can I Run My Equipment Without the Inner Air Filter?

Absolutely not. The inner filter protects the engine from fine dust and debris. Operating without it can lead to severe engine damage and should be avoided at all costs.

How do I Know if the Inner Air Filter Needs to be Replaced?

The most reliable way is to inspect the filter directly. Remove the outer filter and examine the inner filter for dirt, debris, or damage. If it's visibly dirty, it needs replacement. Also, if the outer filter is getting excessively dirty very quickly, it might indicate that the inner filter is also becoming clogged and needs attention.

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