Caterpillar 4951507 Diesel Exhaust Fluid Filter Assembly

Technical engineering specifications for Caterpillar 4951507 DEF filter assembly. This filter GP-DE (Diesel Exhaust) removes particulate contaminants and crystallization from Diesel Exhaust Fluid (DEF/AdBlue) before injection into the Selective Catalytic Reduction (SCR) system. Designed for Caterpillar C4.4 and XQ115 engines meeting Tier 4 Final / Stage IV emission standards. The filter housing integrates a filter element and vent/breather function. Regular replacement per OEM maintenance intervals ensures SCR catalyst longevity and NOx conversion efficiency. Material composition includes a synthetic filter media compatible with 32.5% urea solution (AUS 32), corrosion-resistant housing, and sealed connections. Cross-references include Mann-Filter U5009, Hifi KD80618, Perkins 4951506, and Kubota 1J508-19660. Direct OEM replacement for Caterpillar part numbers 495-1507 and 4951507.