The Multiquip 1157890940 Coupling Nut DCA-45USJ 4JG1 is a genuine OEM component designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this coupling nut is engineered to the exact specifications required by the Isuzu 4JG1 engine platform used in the DCA-45USJ. As an authentic OEM part, it delivers the correct thread engagement, torque retention, and dimensional fit that this application demands. Confirm your model is the DCA-45USJ before ordering to ensure a direct match.
Key Features
- Isuzu 4JG1 Engine-Specific Fit — Threaded to the dimensional spec of the 4JG1 engine used in the DCA-45USJ, ensuring proper seating and engagement without modification.
- Genuine OEM Construction — Manufactured to Multiquip's original coupling specifications, providing the thread form, material grade, and torque capacity required for this drivetrain connection point.
- Verified DCA-45USJ Compatibility — Designed specifically for the DCA-45USJ ultra-silent generator series; always cross-reference your model before ordering.
- Coupling Integrity Under Load — A correctly fitted coupling nut maintains secure mechanical connection between engine and driven components, preventing misalignment, vibration, or power transfer loss during generator operation.
- Direct OEM Replacement — Replaces the original part on a like-for-like basis, reinstating the mechanical connection to as-built condition without additional hardware.
A coupling nut serves as the fastening element that secures and aligns two coupled mechanical components — in this case, within the drivetrain of the DCA-45USJ's Isuzu 4JG1 engine system. It maintains the axial and rotational connection between mating shafts or flanges, ensuring power is transferred smoothly and the assembly stays properly loaded under operating conditions. When a coupling nut becomes worn, stripped, or loose, it can introduce vibration, misalignment, or complete loss of drive connection, disrupting generator output and potentially causing secondary component damage.
For fitment questions or to confirm compatibility with your DCA-45USJ, contact the DHS Equipment team directly.
Part Details
| Part Number | 1157890940 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Coupling Nut DCA-45USJ 4JG1 |
Compatibility & Fitment
| Name | Model |
|---|---|
| DCA-45USJ | DCA-45USJ |
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.
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