Replace DEF Tank Vent Filter

IMPORTANT: Initial replacement 1500 hours of operation or 1 year whichever comes first. Thereafter, replace every 4500 hours of operation or every 3 years, whichever comes first.

See Replace Diesel Exhaust Fluid (DEF) Tank Vent Filter-Final Tier 4 and Stage IV Engines in 1500 Hour Service section of this Operator’s Manual.