Multiquip 8971455590 Pipe Assembly Injection DCA25USI 4LE2

The Multiquip 8971455590 is a genuine OEM Pipe Assembly Injection DCA25USI 4LE2 designed for the DCA25USI ultra-silent diesel generator series. As a direct OEM replacement, this assembly is sourced to match the original specification of the 4LE2 engine fuel injection system installed in DCA25USI units. Sourcing the correct injection pipe assembly is critical to maintaining proper fuel delivery pressure and spray timing — this part ensures you are installing the exact component Multiquip specifies for this application. DHS Equipment stocks this part to help keep your DCA25USI generator operating at full capacity.

Key Features

• Genuine OEM Fuel System Integrity — Manufactured to the original injection pipe specification for the 4LE2 engine, ensuring correct fuel line routing, connection geometry, and pressure retention from pump to injector.
• Drop-In Assembly for DCA25USI — Engineered specifically for the DCA25USI generator platform, connecting directly to the existing injection system without improvised fitting or adaptation.
• Confirmed Fitment for DCA25USI 4LE2-Powered Units — Compatible with DCA25USI ultra-silent generators equipped with the Isuzu 4LE2 diesel engine.
• Maintains Injection Timing and Fuel Delivery Accuracy — A correctly seated injection pipe assembly preserves the precise fuel metering your 4LE2 engine depends on for stable power output and efficient combustion.
• Fuel System Safety — An intact, OEM-spec injection pipe prevents fuel leaks at high-pressure connection points, reducing fire and contamination risk in an enclosed generator enclosure.

The injection pipe assembly routes high-pressure fuel from the injection pump directly to each injector on the engine. On the 4LE2 diesel engine found in DCA25USI generators, these pipes must maintain a precise internal diameter, wall thickness, and end-fitting geometry to sustain the pressure spikes generated during each injection event. When an injection pipe cracks, corrodes, or develops a loose fitting, fuel pressure drops at the injector — causing hard starts, rough running, misfires, or a complete loss of power output. Replacing a damaged pipe with the correct OEM assembly restores proper injection pressure and protects surrounding engine components from fuel contamination.

Part Details

Compatibility & Fitment

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.