Multiquip 8971433321 Injection Pump Assembly DCA25USI 4LE2

The Multiquip 8971433321 is a genuine OEM Injection Pump Assembly DCA25USI 4LE2 designed for the DCA25USI ultra-silent diesel generator series. As a direct OEM replacement, this assembly matches the original equipment specification for the Isuzu 4LE2 engine platform, ensuring the fuel delivery system operates exactly as engineered. DHS Equipment supplies this part direct, so you can be confident you are receiving an authentic Multiquip component backed by the manufacturer. If you are servicing a DCA25USI unit, this is the correct injection pump assembly for your machine.

Key Features

• OEM-Matched Fuel Delivery Precision — Built to the exact flow rate and pressure specifications of the Isuzu 4LE2 engine, ensuring consistent fuel metering across the full load range of the DCA25USI generator.
• Direct-Fit Replacement for DCA25USI — Engineered to mount and connect to the 4LE2 engine using the original attachment points and fuel line interfaces, simplifying the swap during scheduled or emergency servicing.
• Confirmed Fitment for DCA25USI Ultra-Silent Generators — Verified for the DCA25USI platform; reference part number 8971433321 when ordering to confirm application accuracy.
• Protects Engine Output Consistency — A properly functioning injection pump maintains stable voltage and Hz output from the generator; a worn or failing pump causes load instability, hard starting, and reduced power delivery.
• Fuel System Safety Assurance — An OEM injection pump maintains correct injection timing and pressure, reducing the risk of fuel system faults that can cause engine damage or uncontrolled shutdown under load.

The injection pump assembly is the heart of the diesel fuel system on the Isuzu 4LE2 engine. It meters and pressurizes fuel before delivering it to the injectors at precisely the right moment in the combustion cycle, controlling engine speed, power output, and emissions compliance. When the injection pump wears or fails, symptoms include hard starting, rough running, loss of power, excessive smoke, and in severe cases complete engine shutdown — all of which directly compromise the generator's ability to deliver stable electrical output on the jobsite.

For fitment questions or help confirming this is the right part for your DCA25USI generator, contact the DHS Equipment team directly.

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.