CAT / Perkins DEF Head Unit : OEM ASP-918-1731-13

DEF System Accuracy Starts with the Right Head Unit

What Is It?

The CAT / Perkins DEF Head Unit (OEM ASP-918-1731-13) is a fully integrated component that monitors Diesel Exhaust Fluid (DEF) levels, temperature, and quality in SCR-equipped systems. Designed for use in various CAT and Perkins diesel applications, this unit is critical to ensuring the DEF system functions correctly and communicates accurately with the engine's control module.

Why Choose OEM ASP-918-1731-13?

The OEM ASP-918-1731-13 is manufactured to meet the original factory specifications of CAT and Perkins engines. With its factory-grade compatibility and sensor accuracy, this unit helps avoid false system warnings and ensures the DEF system operates as intended in emissions-controlled environments.

Key Benefits

✅ Integrated Sensor Assembly: Includes DEF level, temperature, and quality sensors
✅ OEM-Grade Compatibility: Built to match CAT and Perkins engine systems precisely
✅ Durable and Sealed: Designed to resist DEF crystallization and harsh underbody exposure
✅ Simple Installation: Direct fitment using factory connectors and mounting points
✅ Supports Emissions Compliance: Helps maintain SCR system reliability and avoid warning codes

Applications

This DEF head unit is designed for CAT and Perkins diesel engines equipped with Selective Catalytic Reduction (SCR) systems. It’s ideal for use in construction machinery, generators, and industrial equipment where emissions monitoring and system consistency are critical.

Installation Notes

Before installation, inspect the DEF tank and surrounding components for contamination, crystallization, or corrosion. Installation is straightforward and requires connecting the unit to factory wiring and securing it into the DEF tank. After replacement, it may be necessary to scan and clear diagnostic codes to ensure full functionality.

Final Thoughts

The OEM ASP-918-1731-13 DEF Head Unit is a smart replacement choice for keeping your CAT or Perkins engine’s DEF system functioning reliably. With factory-specific design and trusted durability, this component ensures that your emissions system runs smoothly—without the hassle of compatibility concerns.