Multiquip 8972315180 Camshaft Injection Pump DCA-45USJ 4JG1

The Multiquip 8972315180 is a genuine OEM Camshaft Injection Pump DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent generator. As a direct OEM replacement, this part is sourced to exact Multiquip specifications, ensuring proper fitment and correct injection timing for the Isuzu 4JG1 engine used in this generator series. Confirmed compatible with the DCA-45USJ, this component is an essential service part for operators maintaining peak engine performance on their ultra-silent generator.

Key Features

• OEM Injection System Integrity — Manufactured to the exact tolerances required for the 4JG1 engine's fuel injection timing, ensuring the pump drive operates within the engine's specified parameters.
• Direct-Fit Replacement — Engineered to install directly into the DCA-45USJ engine block without adaptation, matching the original mounting configuration and drive interface.
• Confirmed DCA-45USJ Fitment — Verified for use with the Multiquip DCA-45USJ ultra-silent diesel generator powered by the Isuzu 4JG1 engine.
• Sustained Fuel Delivery Accuracy — A correctly functioning injection pump camshaft maintains precise fuel delivery timing; a worn or failed unit causes misfiring, hard starting, and loss of generator output.
• Fuel System Safety — Correct injection pump timing is critical to preventing uncontrolled combustion events and maintaining safe, stable generator operation under load.

The injection pump camshaft is the mechanical heart of the diesel fuel injection system. It drives the high-pressure injection pump plungers in precise sequence, dictating when and how much fuel enters each cylinder. If the camshaft wears or fails, injection timing deteriorates — leading to rough running, excessive smoke, reduced power output, and potential engine damage. Replacing a worn camshaft with a genuine OEM part restores the exacting timing the 4JG1 engine requires to run cleanly and efficiently.

For fitment questions or help confirming this part is right for your DCA-45USJ generator, contact the DHS Equipment parts team.

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.