CATFilters

4W6691 Filter Element As-Air — Cat 3408 3412

This air filter element is engineered to remove particulate contaminants from the air entering the engine, crucial for maintaining optimal combustion and preventing internal wear. It is built to meet rigorous OEM standards, offering superior filtration and durability over a worn or damaged filter that allows contaminants through. Operators might notice a significant loss of engine power, increased exhaust emissions, or rough engine operation when this filter becomes compromised.

Filter Element As-Air – Part No 4W6691 – CAT Spare Part
Part Specifications
BrandCAT
CategoryFilters
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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Installation & Application Notes

Never run an engine without a filter — even briefly causes abrasive damage. Pre-fill fuel filters with clean fuel before fitting to reduce prime time. Replace O-rings on filter housings every second service. Record change dates on filter housing.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeAir Filter Element
MaterialPaper, Rubber
ApplicationEngine air intake system
Service LifeReplace every 500-1000 hours or as needed
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

An engine experiencing a restricted air filter will first show signs of reduced power and sluggish acceleration. If the restriction worsens, fuel economy will decline, and the engine may begin to run rough or emit dark exhaust smoke. Prolonged operation with a dirty air filter can lead to increased wear on engine components and potential damage to the turbocharger.

Installation Tip

Before installing the new filter, carefully inspect the air intake system for any signs of damage or leaks. Ensure the sealing surfaces on both the filter and the housing are clean and free of obstructions.

Service Note

When replacing the air filter, it is a good practice to inspect the turbocharger impeller for any signs of damage or excessive wear.