The Multiquip RE554142 SCR Catalyst is a genuine OEM component designed for DCA300SSJU4F super-silent diesel generators. As a direct OEM replacement, this part is sourced to the same specification as the original, ensuring proper fitment and continued compliance with Tier 4 emissions standards on your DCA300SSJU4F unit. Keeping this component in proper working condition is critical to the legal operation and environmental compliance of your generator on regulated jobsites.
Key Features
- Genuine OEM Emissions Integrity — Sourced to the exact chemical conversion specification required for SCR system function, not a universal substitute.
- Direct Drop-In Fitment — Engineered to mount into the exhaust aftertreatment system of the DCA300SSJU4F without modification to flanges, mounting brackets, or DEF injector connections.
- DCA300SSJU4F Compatibility — Confirmed fitment for the DCA300SSJU4F Tier 4 Final super-silent diesel generator series.
- NOx Reduction Performance — Maintains the selective catalytic reduction system's ability to convert nitrogen oxides into harmless nitrogen and water vapor, keeping exhaust output within Tier 4 Final limits.
- Regulatory Compliance Critical — A degraded or failed SCR catalyst can result in emissions violations and generator lockout on electronically monitored units; replacing with a genuine OEM part protects operational continuity on permitted sites.
The SCR (Selective Catalytic Reduction) catalyst is a core component of the exhaust aftertreatment system found on Tier 4 Final diesel engines. It works by reacting diesel exhaust fluid (DEF) with exhaust gases passing through the catalyst substrate, chemically converting harmful nitrogen oxides into nitrogen gas and water. When the catalyst degrades or becomes contaminated, NOx conversion efficiency drops, triggering fault codes, derate conditions, or full generator shutdown on electronically governed machines — making timely replacement essential to uninterrupted operation.
For fitment questions or to confirm this part is correct for your application, contact the DHS Equipment team.
Part Details
| Part Number | RE554142 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | SCR Catalyst |
Compatibility & Fitment
| Name | Model |
|---|---|
| Super-Silent Generators | DCA300SSJU4F |
| Diesel Powered Generators | DCA300SSJU4F (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.
