NON LOCKING DEF CAP (VENT (JCB JC400/E8363)

A damaged DEF cap can allow contaminants into the diesel exhaust fluid system, leading to potential injector clogging. The JCB catalog reference for this aftermarket replacement part is JC400/E8363. This non-locking vent cap covers the DEF tank fill port while allowing pressure equalization. Its primary mechanical function is to seal the opening while venting internal pressure. A common failure consequence is that a missing or faulty cap permits dirt and moisture entry, which degrades fluid quality. Keeping the vent cap in sound condition helps maintain system cleanliness and proper fluid flow. Verify the serial number or application, then call (562) 693-7748.

Part number variants: JC400/E8363, jc400/e8363