The Multiquip D4139000003 Exciter Field Assembly is a genuine OEM component designed for DLW300ES, DLW400ES, DLW330X2, and DLW400ESA4 series diesel light welder/generators. Sourced directly from Multiquip, this part meets the exact electrical specifications of the original assembly — no substitutions, no guesswork. If you are servicing a DLW-series machine and the exciter output has dropped or failed entirely, D4139000003 is the correct replacement to restore full generator function.
Key Features
- Correct Winding Specification: — Engineered to the original field coil resistance and output ratings, ensuring the exciter delivers the precise magnetic field strength needed for stable voltage generation.
- Direct Assembly Replacement: — Supplied as a complete field assembly, it drops into the existing exciter housing the same way the original unit was installed — no re-winding or improvisation required.
- Confirmed DLW-Series Fitment: — Verified for DLW300ES, DLW400ES, DLW330X2, and DLW400ESA4 welder/generator models; always cross-reference your model code before ordering.
- Stable Welding and Generator Output: — A properly functioning exciter field maintains consistent AC voltage output, which directly affects arc stability during welding and clean power delivery for connected tools or lights.
- Electrical Safety Compliance: — As a core electrical component in a generator circuit, using a correctly rated OEM field assembly helps prevent voltage irregularities that can damage connected equipment or create unsafe operating conditions.
The exciter field assembly is a stationary winding inside the exciter — the smaller generator that energizes the main rotor of a welder/generator set. It produces the magnetic field that induces current in the exciter rotor, which in turn supplies the rotating field of the main alternator. When the exciter field degrades or fails, the machine loses the ability to self-excite, resulting in low or zero voltage output at the terminals. Replacing a worn or open-circuited field assembly with the correct OEM part restores proper excitation and brings the machine back to its rated welding and power generation output.
Part Details
| Part Number | D4139000003 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Exciter Field Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | DLW300ES |
| Welders | DLW300ESA |
| Welders | DLW300ESA1 |
| Welders | DLW400ES |
| Welders | DLW400ESA |
| Welders | DLW400ESA1 |
| Welders | DLW330X2 |
| Welders | DLW400ESA4 |
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.
