The Multiquip RE554144 SCR Catalyst is a genuine OEM component designed for the DCA220SSJU4F super-silent diesel generator series. As a direct OEM replacement, this catalyst is manufactured to the exact specifications required to keep Tier 4 Final emissions systems operating correctly on DCA220SSJU4F units. Sourced directly through Multiquip's authorized parts network, the RE554144 ensures your generator stays in compliance and performs as originally engineered.
Key Features
- Tier 4 Emissions-Grade Construction — Built to the precise catalyst substrate and coating specifications required for Tier 4 Final diesel exhaust aftertreatment, maintaining correct NOx reduction performance.
- Direct OEM Replacement — Replaces the original SCR catalyst unit on DCA220SSJU4F generators with a drop-in fit that matches the existing exhaust aftertreatment housing and mounting interface.
- Confirmed Fitment — Verified for the DCA220SSJU4F super-silent, Tier 4 Final diesel generator in both standard and 60Hz configurations.
- Sustained NOx Reduction — A functioning SCR catalyst converts nitrogen oxides in the exhaust stream into harmless nitrogen and water vapor; a degraded catalyst leads to emissions exceedances and potential regulatory non-compliance.
- Emissions System Compliance — Replacing a worn or failed SCR catalyst with a genuine OEM unit is essential for meeting EPA Tier 4 Final standards and avoiding operation restrictions on regulated jobsites.
The SCR (Selective Catalytic Reduction) catalyst is a core component of the diesel exhaust aftertreatment system on Tier 4 Final engines. It works by reacting diesel exhaust fluid (DEF) with exhaust gases to chemically reduce harmful nitrogen oxide (NOx) emissions before they exit the stack. When the catalyst degrades or becomes contaminated, NOx conversion efficiency drops, triggering fault codes, derate conditions, or outright shutdown on emission-controlled generator sets — making timely replacement critical to keeping the unit operational and compliant.
| Fits: DCA220SSJU4F
Have questions about this part? Contact the DHS Equipment parts team to confirm fitment or check availability for your generator.
Part Details
| Part Number | RE554144 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | SCR Catalyst |
Compatibility & Fitment
| Name | Model |
|---|---|
| Super-Silent Generators | DCA220SSJU4F |
| Diesel Powered Generators | DCA220SSJU4F 60Hz |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
