CAT / Perkins DEF Head Unit : OEM ASP-918-1731-18
Protect Your Emissions System with a Trusted DEF Head Unit
What Is It?
The CAT / Perkins DEF Head Unit (OEM ASP-918-1731-18) is a vital component for SCR-equipped diesel engines. It combines DEF level sensing, temperature monitoring, and fluid suction into one OEM-calibrated unit, designed to help ensure the smooth operation of the DEF system in emissions-regulated engines.
Why Choose OEM ASP-918-1731-18?
Built to CAT and Perkins specifications, the OEM ASP-918-1731-18 offers dependable integration with your vehicle’s DEF system. It ensures accurate feedback to the engine control module and maintains proper fluid transfer, helping to reduce the risk of warning codes or interruptions due to DEF system faults.
Key Benefits
✅ Multi-Function Unit: Monitors DEF level, temperature, and includes a suction tube
✅ OEM Fit and Function: Designed for direct compatibility with CAT and Perkins systems
✅ Rugged Construction: Resistant to DEF crystallization, corrosion, and environmental stress
✅ Quick Installation: Uses factory mounting points and electrical connections
✅ Reliable Communication: Supports accurate emissions monitoring and system stability
Applications
This DEF head unit is ideal for CAT and Perkins-powered equipment used in agriculture, construction, power generation, and industrial applications. It is designed to maintain critical emissions control functions in diesel engines using Selective Catalytic Reduction (SCR) systems.
Installation Notes
Before installation, inspect the DEF tank and system connectors for signs of crystallization or damage. The unit installs directly into the DEF tank using OEM fittings and wiring harnesses. After installation, it may be necessary to reset any stored fault codes with a diagnostic tool.
Final Thoughts
The OEM ASP-918-1731-18 DEF Head Unit is a trusted solution for restoring the full functionality of your CAT or Perkins DEF system. With factory-grade fitment and durability, it helps keep your equipment compliant, protected, and running as expected in demanding work environments.