Caterpillar DEF Doser Injector 2018-2024: OEM 6540-71-1110

Precise DEF Delivery for Caterpillar SCR Systems

What Is It?

The OEM 6540‑71‑1110 DEF doser injector is a direct-fit dosing valve designed for Caterpillar diesel engines equipped with SCR systems from 2018 to 2024. Positioned within the DEF delivery assembly, it dispenses precise amounts of Diesel Exhaust Fluid into the exhaust stream to reduce nitrogen oxide (NOₓ) emissions.

Why Choose OEM 6540‑71‑1110?

Built to Caterpillar’s exact factory specifications, this injector ensures accurate dosing and dependable compatibility with ECM control protocols. Its plug-and-play design minimizes installation errors and emissions faults, helping maintain SCR system reliability.

Key Benefits

✅ Exact-match fit for Caterpillar SCR engines
✅ Accurate DEF metering into the exhaust flow
✅ Factory wiring compatibility—no modification needed
✅ Corrosion-resistant and high-temperature materials
✅ Helps maintain NOₓ reduction and emissions standards

Applications

Used extensively in off-highway and heavy-duty Cat equipment—such as excavators, wheel loaders, and generators—equipped with SCR systems. Ideal for fleets working under stringent emissions regulations requiring consistent aftertreatment working conditions.

Installation Notes

Only certified technicians should install this unit. Clean inlet lines and mating surfaces before assembly. After installation, conduct a system diagnostic or forced SCR cycle to confirm proper dosing, clear any fault codes, and verify injector operation.

Final Thoughts

The OEM 6540‑71‑1110 doser injector is vital for maintaining accurate DEF delivery and SCR system effectiveness in modern Caterpillar engines. With OEM-level reliability and installation ease, it’s a smart choice for ensuring sustained emissions compliance and uptime.