The Multiquip 8972389640 is a genuine OEM Case Timing Gear DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent diesel generator. This is a direct OEM replacement sourced through Multiquip's authorized parts program, ensuring the component meets the exact specifications of the original part. Correct fitment is confirmed for DCA-45USJ series equipment powered by the Isuzu 4JG1 engine. If you're servicing or rebuilding the timing system on your DCA-45USJ, part number 8972389640 is the correct OEM case timing gear for this application.
Key Features
- Genuine OEM Timing Precision — Manufactured to the exact tooth profile and dimensional tolerances required by the Isuzu 4JG1 engine, ensuring correct valve and injection timing is maintained.
- Direct Application Fit — Engineered specifically for the 4JG1 engine assembly; installs into the timing gear case without modification, aligning with the original gear train layout.
- DCA-45USJ Compatibility — Verified replacement for Multiquip DCA-45USJ ultra-silent diesel generators equipped with the Isuzu 4JG1 powerplant.
- Engine Timing Integrity — A correctly functioning timing gear keeps combustion events precisely synchronized; a worn or damaged gear causes rough running, power loss, and potential engine damage.
- Fuel System Safety — Proper timing gear condition is critical to maintaining correct injection timing, preventing over-fueling conditions that can damage injectors and the combustion chamber.
The case timing gear is a core component of the engine's valve train and fuel injection timing system. It transfers rotational drive from the crankshaft to the camshaft and injection pump, keeping combustion events precisely timed for efficient, stable power output. When this gear wears, chips, or develops backlash, timing drift occurs — leading to hard starting, reduced output, excessive vibration, and accelerated internal engine wear.
Part Details
| Part Number | 8972389640 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Case Timing Gear 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.
