Multiquip 8973060620 Injection Pump Drive Coupling DCA-45USJ 4JG1

The Multiquip 8973060620 Injection Pump Drive Coupling DCA-45USJ 4JG1 is a genuine OEM component designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this coupling is built to the exact specifications of the original part, ensuring a correct, direct installation with no adaptation required. It is confirmed to fit the DCA-45USJ, which is powered by the Isuzu 4JG1 diesel engine.

Key Features

• Genuine OEM Construction — Manufactured to the exact tolerances required for the 4JG1 engine's injection pump drive interface, ensuring proper torque transfer and coupling engagement.
• Direct-Fit Replacement — Matches the original mounting configuration of the DCA-45USJ injection pump drive, dropping in exactly as the factory component.
• Confirmed DCA-45USJ Fitment — Engineered specifically for the DCA-45USJ ultra-silent generator series with Isuzu 4JG1 power.
• Fuel System Integrity — A properly functioning drive coupling maintains consistent injection pump timing and fuel delivery, supporting stable generator output and smooth engine operation.
• Fuel System Safety — A worn or failed injection pump drive coupling can cause erratic fuel delivery or complete pump failure; replacing with a genuine OEM part restores safe, predictable engine operation.

The injection pump drive coupling is the mechanical link between the engine's drive system and the fuel injection pump. It transmits rotational force to the injection pump, enabling precise, timed fuel delivery into the combustion chamber. When this coupling wears, cracks, or fails, fuel injection timing is disrupted — leading to hard starting, rough running, loss of power output, or complete engine shutdown. Replacing it promptly with a correct OEM component restores the engine's fuel delivery cycle and protects the injection pump from additional stress or damage.

For fitment questions or help confirming compatibility with your DCA-45USJ, 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.