CATFilters

390-3423 Air Filter — Cat CT660 CT681

This is a premium air filter engineered to capture fine dust and particulate matter, safeguarding your engine's critical internal components. It is manufactured to meet rigorous filtration standards, offering superior protection compared to a worn or damaged filter. Symptoms of a failing air filter include a loss of engine power and increased exhaust smoke.

Air Filter – Part No 390-3423 – 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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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
MaterialHigh-density synthetic media
ApplicationEngine air intake system
Service LifeReplace every 1,000-2,000 hours or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A gradual decrease in engine power and a noticeable increase in black exhaust smoke are common initial symptoms. If left unaddressed, the engine will struggle to breathe, leading to poor fuel economy and potential damage to internal components from ingested dirt. Continued operation with a severely clogged filter risks significant engine wear.

Installation Tip

Always ensure the air filter housing seals are clean and free of debris before seating the new filter. Avoid forcing the filter into place, as this can damage the media or the housing.

Service Note

Inspect the air filter housing and intake ducting for any signs of damage or leaks during filter replacement.