CATFilters

4i-1278 Cabin Air Filter — Cat 311 312

Name: 4i-1278 Cabin Air Filter — Cat 311 312
Brand: CAT
SKU: 4i-1278
Availability: InStock

This cabin air filter is designed to remove dust, pollen, and other airborne contaminants from the air entering the operator's cab. It meets high filtration standards, providing a cleaner and more comfortable working environment compared to a saturated or torn filter. A clogged filter can result in reduced airflow to the cabin, increased strain on the HVAC system, and unpleasant odors.

Cabin Air Filter – Part No 4i-1278 – CAT Spare Part

Part Specifications

Brand	CAT
Category	Filters
Condition	Aftermarket — OEM Specification
Dispatch	Same-day from Mumbai (before 3 PM IST)
GST Invoice	Available — all orders
Export Docs	Commercial invoice, packing list, COO

Compatible Models

CAT Excavator 311 312 315 317 318 319 320 330 322 323 324 325 365 345 385 307

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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India

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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

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 Type	Cabin Air Filter
Material	Multi-layer synthetic media
Application	HVAC system - Operator Cabin
Service Life	Replace every 6-12 months or as needed based on operating environment
Compatibility	CAT Excavator 311, 312, 315, 317, 318, 319, 320
Condition	New — OEM specification aftermarket

Failure Symptoms

The first sign of a clogged cabin air filter is a noticeable reduction in airflow from the HVAC vents. If ignored, the system's fan motor may work harder, leading to reduced cooling or heating efficiency and potentially a musty odor. This can create an uncomfortable and unhealthy working environment for the operator.

Installation Tip

Before installing the new filter, ensure the filter housing and surrounding area are free of debris to prevent contamination. Make sure the airflow direction arrow on the new filter aligns with the system's airflow direction.

Service Note

While replacing the cabin air filter, it is a good time to inspect the HVAC system's blower motor and evaporator/heater core for cleanliness and proper function.

4i-1278 Cabin Air Filter — Cat 311 312

Compatible Models

Related CAT Parts

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Installation & Application Notes

Failure Symptoms