The Multiquip 8941578840 is a genuine OEM Oil Filter Plug Gasket designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this gasket is built to the exact tolerances required by the 4JG1 engine platform used in the DCA-45USJ series. Keeping the oil filter plug sealed correctly is critical to maintaining proper oil pressure and preventing leaks during operation. If you are servicing the oil system on a DCA-45USJ, 8941578840 is the correct OEM-specified gasket for the job.
Key Features
- OEM Sealing Integrity — Manufactured to the exact compression and material specification required by the 4JG1 engine, ensuring a leak-free seal at the oil filter plug seat.
- Direct-Fit for DCA-45USJ — Matches the original gasket dimensions for the DCA-45USJ oil filter plug, installing exactly as the factory component without rework or trimming.
- Genuine Multiquip Component — Supplied as a genuine OEM part, meaning it carries the same quality standard as the gasket your machine shipped with.
- Protects Oil System Performance — A correctly seated plug gasket maintains oil pressure integrity across the lubrication circuit, protecting the 4JG1 engine from oil loss and contamination ingress.
- Essential Service Item — Replace this gasket whenever the oil filter plug is removed during routine oil changes or engine servicing to prevent weeping seals and oil contamination on the generator housing.
The oil filter plug gasket forms the sealing interface between the oil filter plug and the engine block on the 4JG1 diesel engine. Its job is to prevent engine oil from escaping around the plug during operation, where even a minor leak can lead to oil pressure loss, external contamination, and accelerated engine wear. Over time and through repeated heat cycles, the gasket compresses and loses its ability to seal effectively — making replacement during every oil service a sound practice to keep the DCA-45USJ generator running cleanly and reliably.
For questions about fitment or to confirm this is the correct part for your DCA-45USJ, contact the DHS Equipment team.
Part Details
| Part Number | 8941578840 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Oil Filter Plug Gasket 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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