The Multiquip 8971909301 is a genuine OEM Crankshaft DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent generator. As a direct Multiquip OEM component, 8971909301 is manufactured to the exact tolerances required by the Isuzu 4JG1 engine fitted in this unit, ensuring a drop-in replacement with no guesswork on fitment. This part is sourced directly through Multiquip's authorized parts network and sold by DHS Equipment, giving you confidence that you are receiving the correct component for your machine. If your DCA-45USJ is showing signs of crankshaft wear or failure, replacing it with the genuine OEM part is the straightforward path to restoring full engine function.
Key Features
- Genuine OEM Crankshaft Tolerancing — Machined to the precise journal dimensions and surface finish required by the Isuzu 4JG1 engine, supporting correct bearing clearance and oil film integrity.
- Direct Engine Compatibility — Engineered specifically for the Isuzu 4JG1 powerplant, allowing straightforward installation using standard engine rebuild procedures for this motor.
- Confirmed Fitment for DCA-45USJ — Verified for the DCA-45USJ ultra-silent diesel generator series, eliminating compatibility uncertainty during a critical engine repair.
- Restores Full Power Output — A correctly installed crankshaft maintains proper compression stroke geometry, allowing the 4JG1 engine to deliver its rated output and stable generator frequency.
- Engine Integrity and Safety — A worn or damaged crankshaft can cause catastrophic engine failure and unpredictable generator output; replacing with a genuine OEM part restores safe, controlled engine operation.
The crankshaft is the central rotating component of the engine, converting the linear force of the pistons into the rotational energy that drives the generator's alternator. In the Isuzu 4JG1 engine found in the DCA-45USJ, the crankshaft must maintain precise dimensional tolerances to preserve correct bearing clearances, oil pressure, and compression ratios. When a crankshaft becomes worn, scored, or cracked, it can lead to loss of oil pressure, excessive vibration, bearing failure, or complete engine seizure — taking the generator out of service entirely.
Part Details
| Part Number | 8971909301 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Crankshaft 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.
