Description

When you’re dealing with modern emission control systems, you know how critical it is to keep your AdBlue (DEF) system sealed and protected. A cracked or missing filler cap lets in moisture and dirt while allowing costly DEF fluid to evaporate—problems that can trigger error codes and put your tractor into limp mode right when you need it most. This replacement cap keeps your emissions system running clean and your operation moving forward.

What You’re Getting

Secure, leak-proof seal that keeps DEF fluid fresh and contaminants out
Durable construction designed to handle the temperature swings and vibration of daily farm work
Precise threading for smooth installation and reliable connection to the filler neck
OEM-quality materials that resist chemical degradation from DEF fluid exposure

Built for Real Farm Work

This cap fits across New Holland’s modern tractor lineup, from the versatile T5 series utility tractors through the powerful T9 series four-wheel drives. Whether you’re running a T6 on livestock operations, using a T7 for row-crop work, or pulling heavy tillage equipment with a T8, this cap ensures your emissions system stays protected while you focus on getting the job done.

Made to Last

Farm environments are tough on DEF caps—they’re exposed to dust, chemicals, UV rays, and constant temperature changes. This cap is built with materials that won’t crack or degrade over time, maintaining a proper seal that protects your expensive DEF fluid and keeps your SCR system functioning correctly season after season.

Good to Know

Installation is straightforward—just thread it on until it seats properly against the sealing surface. Don’t overtighten, as this can damage the threads or sealing surface. If you’ve been dealing with DEF quality warnings, replacing a worn cap is often the first step before assuming you have bigger emission system problems.