The Multiquip 8941099131 Shaft Idle Gear DCA-45USJ 4JG1 is a genuine OEM component designed for the DCA-45USJ ultra-silent generator series. Sourced directly from Multiquip, this part carries the same specifications as the original, ensuring correct mesh alignment and gear engagement within the 4JG1 engine's geartrain. Compatibility is confirmed for the DCA-45USJ, making it a straightforward service replacement for technicians working on this Isuzu-powered unit.
Key Features
- OEM-Spec Gear Geometry — Manufactured to original tooth profile and dimensional tolerances for the 4JG1 engine geartrain, ensuring proper mesh contact and minimal backlash.
- Direct-Fit Installation — Engineered to the original shaft and bore specifications of the DCA-45USJ, allowing drop-in replacement without modification to surrounding components.
- Confirmed DCA-45USJ Fitment — Verified for the DCA-45USJ ultra-silent diesel generator, eliminating guesswork when sourcing geartrain components for this platform.
- Sustained Engine Timing Integrity — A correctly functioning idle gear maintains proper rotational transfer between shafts; a worn or damaged gear can introduce timing irregularities that affect engine output and stability under load.
- Genuine Multiquip Part — Supplied as authentic OEM inventory, so you receive the same component installed at the factory rather than an approximation.
The idle gear shaft is a critical element of the engine's internal geartrain, responsible for transmitting rotational motion between the crankshaft and ancillary driven components such as the injection pump and oil pump. It acts as an intermediary gear that keeps these systems synchronized with engine timing. When the idle gear or its shaft wears, develops excessive play, or fails, the result can be erratic injection timing, loss of oil pressure, increased engine noise, and ultimately a failure to maintain stable generator output — making timely replacement essential for continued operation.
Part Details
| Part Number | 8941099131 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Shaft Idle 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.
