Auxiliary Fuel Tank Cap for Ford New Holland 40 Series Tractors SKU: QT409660

A loose, damaged, or missing fuel cap on your auxiliary tank invites dirt, water, and debris straight into your expensive diesel fuel, creating the kind of contamination that destroys injection systems and turns productive days into costly repair downtime. This replacement cap restores the proper seal your Ford New Holland 40 series auxiliary fuel system needs to keep fuel clean and protected.

Why Proper Sealing Matters

• Prevents fuel contamination that can clog filters and damage injection components
• Reduces fuel evaporation during long work days and storage periods
• Maintains correct tank venting to prevent vacuum buildup or pressure issues
• Weather-resistant construction stands up to agricultural environments

When your auxiliary fuel cap fails, you're risking the entire fuel system on tractors designed for extended field operations. S&H Parts has been helping farmers maintain their equipment reliability since 1969—call if you need help confirming the right fit for your specific model.