Komatsu PC170LC-11 SCR Outlet Catalyst Module 2013-2021: OEM 6544-01-0070

From Heavy-Duty Excavation to Cleaner Exhaust: Komatsu PC170LC-11 SCR Catalyst (2013–2021)

What is it?

The Komatsu PC170LC-11 SCR Outlet Catalyst Module, identified by OEM 6544-01-0070, 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 by facilitating a catalytic reaction that converts these pollutants into nitrogen and water vapor. It works with the Diesel Exhaust Fluid (DEF) delivery system and other aftertreatment components to support proper exhaust treatment during equipment operation.

Why choose this SCR Outlet Catalyst Module?

Komatsu PC170LC-11 excavators frequently operate under demanding conditions involving extended working hours, varying engine loads, and challenging construction environments. Maintaining an effective SCR system is essential for controlling exhaust emissions throughout these operating conditions. OEM 6544-01-0070 is intended for compatible applications from 2013 through 2021.

SCR catalyst modules experience continuous exposure to high exhaust temperatures, vibration, repeated thermal cycles, and combustion byproducts. Over time, DEF crystallization, internal catalyst deterioration, contamination, or exhaust leaks can interfere with 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. Installing the correct application-matched replacement helps restore the intended exhaust treatment process when catalyst deterioration has been confirmed.

Key Benefits

✅ Intended for compatible Komatsu PC170LC-11 applications (2013–2021)
✅ Helps reduce nitrogen oxide (NOx) emissions from diesel exhaust
✅ Supports the Selective Catalytic Reduction process
✅ Facilitates the conversion of NOx into nitrogen and water vapor
✅ Works with compatible DEF dosing and exhaust treatment components
✅ Designed for demanding construction equipment operating 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, earthmoving, road construction, utility installation, and site preparation projects. Aftertreatment configurations may vary depending on equipment specifications, emissions requirements, and production details. Confirm OEM number 6544-01-0070 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

Proper NOx treatment is essential for maintaining effective emissions control in modern construction equipment. The Komatsu PC170LC-11 SCR Outlet Catalyst Module (OEM 6544-01-0070) offers an application-specific replacement option to support consistent exhaust treatment and dependable aftertreatment operation in compatible 2013–2021 excavators.