Multiquip 1157210140 Cover Assembly Governor Injection Pump DCA-45USJ 4JG1

The Multiquip 1157210140 is a genuine OEM Cover Assembly Governor Injection Pump DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent diesel generator. As a factory-sourced component, this part meets the original engineering specifications for the Isuzu 4JG1 engine used in the DCA-45USJ series, ensuring a direct, trouble-free installation. DHS Equipment supplies this part straight from the Multiquip OEM supply chain, so you can be confident you are receiving an authentic replacement matched to your machine. Confirm your model and serial number against 1157210140 before ordering to ensure fitment accuracy.

Key Features

• Genuine OEM Construction — Manufactured to the exact material and dimensional tolerances required for the governor injection pump cover on the Isuzu 4JG1 engine, ensuring proper sealing and governor mechanism enclosure.
• Direct Replacement for DCA-45USJ — Engineered specifically for the DCA-45USJ ultra-silent generator; installs in the original mounting position without rework or secondary machining.
• Protects Fuel System Integrity — The governor cover shields the injection pump's governing components from contamination, keeping fuel delivery calibration stable under load.
• Supports Consistent Generator Output — A properly sealed governor cover maintains the injection pump's ability to regulate fuel delivery precisely, which directly affects voltage and frequency stability in the DCA-45USJ.
• Fuel System Safety — A cracked or missing injection pump cover can expose governor components to debris and moisture, risking fuel system contamination and uncontrolled engine behavior; replacing it promptly preserves safe operation.

The governor injection pump cover is a protective enclosure that houses and seals the governor mechanism on the Isuzu 4JG1 diesel engine's injection pump. The governor controls how much fuel is delivered to the engine based on load demand, and the cover keeps that assembly free from dirt, moisture, and mechanical interference. When this cover is cracked, warped, or missing, contaminants can enter the governor assembly, disrupting fuel metering, causing erratic engine speed, and potentially leading to injection pump failure that takes the generator offline entirely.

For questions about fitment or to verify compatibility with your DCA-45USJ unit, contact the DHS Equipment parts team before ordering.

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.