2P4303 Base A Fits Caterpillar Models

One New Aftermarket Replacement Oil Filter Base Assembly (Base A) for Caterpillar (Cat) Engines and Equipment

This aftermarket replacement oil filter base assembly (Base A) mounts directly to the engine block and serves as the housing foundation for the engine oil filter group on a wide range of Caterpillar (Cat) diesel engines. The base provides the sealing surface and porting that directs oil flow through the filtration system to protect the engine lubrication circuit. It is used across Caterpillar industrial engines, off-highway trucks, wheel tractor-scrapers, articulated dump trucks, excavators, wheel dozers, and generator set engines powered by Cat 3300- and 3400-series powerplants.

Compatible Models

Caterpillar Industrial Engines: D333C, 3126, 3126B, 3304, 3306, 3306B, 3306C, 3406, 3406B, 3406C, 3406E, 3408, 3408B, 3408C, 3412, 3412C, 3412D, 3412E, 3456, 3516, C-7, C-15, C-16, C-18, C-27, C-32

Caterpillar Off-Highway Trucks / Articulated Trucks: 773B, 773D, 775B, 775D, 777D, D350E, D350E II, D400E, D400E II

Caterpillar Wheel Tractor-Scrapers: 621, 621B, 623B, 631D, 631E, 631G, 633E II, 637D, 637E, 637G

Caterpillar Excavators / Other Equipment: 350, 5110B

Verify fitment against your engine serial number before ordering, as this base assembly spans multiple engine families and configurations.

Replaces Part Number(s):

2P4303, 2P-4303

New aftermarket replacement part - not remanufactured, not used.