Komatsu PC170LC-11 SCR Outlet Catalyst Module 2013-2021: OEM 6544-01-0090

When Exhaust Emissions Matter: The Komatsu PC170LC-11 SCR Outlet Catalyst Module (2013–2021)

What is it?

The Komatsu PC170LC-11 SCR Outlet Catalyst Module, identified by OEM 6544-01-0090, is an exhaust aftertreatment component designed to support the Selective Catalytic Reduction (SCR) system in compatible Komatsu excavators. This module helps reduce nitrogen oxide (NOx) emissions through a catalytic process that converts harmful nitrogen oxides into nitrogen and water vapor. Working alongside the Diesel Exhaust Fluid (DEF) delivery system, it supports proper exhaust treatment during demanding construction and earthmoving operations.

Why choose this SCR Outlet Catalyst Module?

Komatsu PC170LC-11 excavators operate in challenging environments where effective emissions control is essential. OEM 6544-01-0090 is intended for compatible applications from 2013 through 2021, helping maintain the correct configuration within the equipment's existing exhaust aftertreatment system.

SCR catalyst modules are continuously exposed to high exhaust temperatures, repeated thermal cycles, vibration, and combustion byproducts. Over time, DEF crystallization, soot contamination, internal catalyst deterioration, or exhaust leaks can interfere with the chemical reactions needed for proper NOx conversion.

Common signs of SCR catalyst problems include emissions-related diagnostic codes, elevated NOx readings, DEF system warnings, abnormal exhaust temperatures, or engine derating. Replacing a damaged or deteriorated catalyst module with the correct application-matched component helps restore the intended exhaust treatment process.

Key Benefits

✅ Intended for compatible Komatsu PC170LC-11 applications (2013–2021)
✅ Helps reduce harmful nitrogen oxide (NOx) emissions
✅ Supports the Selective Catalytic Reduction process
✅ Facilitates the conversion of NOx into nitrogen and water vapor
✅ Integrates with compatible DEF dosing and exhaust treatment components
✅ Designed for demanding construction and earthmoving conditions

Applications

This SCR Outlet Catalyst Module is intended for compatible Komatsu PC170LC-11 hydraulic excavator applications from 2013 through 2021. These machines are commonly used in excavation, road construction, utility installation, site preparation, and earthmoving projects. Aftertreatment configurations may vary depending on equipment specifications, emissions requirements, and production details. Confirm OEM number 6544-01-0090 along with the machine serial number and exhaust system configuration before installation.

Installation Notes

Before installation, allow the exhaust system to cool completely and inspect surrounding aftertreatment components for damage, contamination, or excessive deposits. Check the DEF injector, decomposition tube, NOx sensors, exhaust temperature sensors, clamps, gaskets, and exhaust connections for leaks or deterioration. Identify and correct any underlying DEF dosing, engine-related, or exhaust system issues that may have contributed to catalyst failure. Follow the manufacturer's installation procedures and verify SCR operation using suitable diagnostic equipment after installation.

Final Thoughts

Effective NOx treatment is an important part of maintaining proper emissions control in heavy-duty construction equipment. The Komatsu PC170LC-11 SCR Outlet Catalyst Module (OEM 6544-01-0090) provides an application-specific replacement option to help maintain consistent exhaust treatment and dependable aftertreatment operation in compatible 2013–2021 excavators.