The Wacker Neuson Generator Voltage Regulator is a genuine OEM component designed for the GP-series and GS-series portable generators, including the GPS9700, GPS8500, GS8.5V, GS9.7V, and a wide range of G3.3A, G4.6A, and G5.6A family models. As a direct Wacker Neuson OEM part, the is manufactured to the exact specification of the original component it replaces, ensuring proper output regulation right out of the box. This regulator covers an extensive range of both 60Hz and 50Hz generator configurations across the G and GS portable generator families, making it a high-utility stock item for fleet operators and service technicians alike. Confirm your model number against the fitment list before ordering to ensure compatibility with your specific unit.
Key Features
- Correct Output Specification: — Matched to the original voltage regulation parameters of Wacker Neuson G and GS series generators, ensuring stable AC output under load.
- Genuine OEM Part: — Sourced directly from Wacker Neuson, this is the same regulator installed at the factory — not an approximation or substitute component.
- Broad Generator Family Coverage: — Fits GPS9700, GPS8500, GS8.5V, GS9.7V, G3.3A, G3.3AE, G4.6A, G4.6AE, G5.6A, GS4.6A, GS4.6AE, G3.7A, and related 50Hz and 60Hz variants.
- Drop-In Replacement: — Designed to install in the same position and connect to the same wiring harness as the original regulator, with no reworking of surrounding components.
- Protects Connected Equipment: — A failed or degraded voltage regulator causes uncontrolled output fluctuation that can damage sensitive tools and electronics powered by the generator; replacing it promptly restores safe, stable power delivery.
- Electrical Safety Compliance: — Using the correct OEM regulator maintains the generator's designed voltage and frequency tolerances, keeping the unit operating within its rated electrical safety parameters.
A voltage regulator controls the electrical output of a generator by continuously monitoring and adjusting the excitation current supplied to the alternator field winding. Its job is to hold the generator's AC output voltage steady at the rated level regardless of changes in load demand. When a voltage regulator begins to fail, the output may surge, sag, or become erratic — causing connected tools to run improperly or risking damage to equipment with sensitive electronics. Replacing a worn or failed regulator with a correct OEM unit like the Wacker Neuson 5000087839 restores stable, predictable power output across the full operating range of the generator.
Part Details
| Part Number | 5000087839 |
|---|---|
| Old Part Number | 0087839 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Generator Voltage Regulator |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Portable Generator with Electr ic Start | GPS9700 | 5000008287, 5000620264, 5200005042, 5000620973 |
| Portable Generator with Electr ic Start | GPS8500 | 5000008286 |
| Portable Generator with Electr ic Start | GS8.5V | 5000007661 |
| Portable Generator with Electr ic Start | GS9.7V | 5000007662 |
| 50Hz Portable Generator | G3.3A | 5000008257, 5000008253, 5000008255, 5000008251 |
| 50Hz Portable Generator | G3.3AE | 5000008258, 5000008252, 5000008254, 5000008256, 5000008259 |
| Portable Generator with Electr ic Start | GS5.6A | 5000007191, 5000008046 |
| 50Hz Portable Generator | G4.6A | 5000008266, 5000008262, 5000008264, 5000008260 |
| 50Hz Portable Generator | G4.6AE | 5000008267, 5000008261, 5000008263, 5000008265, 5000008268 |
| 50Hz Portable Generator with E lectric Start | GS4.6A | 5000008275, 5000008271, 5000008273, 5000008269 |
| 50Hz Portable Generator with E lectric Start | GS4.6AE | 5000008276, 5000008270, 5000008272, 5000008274, 5000008277 |
| Portable Generator | G3.7A | 5000007189, 5000008044 |
| Portable Generator | G5.6A | 5000007190, 5000008045, 5000009431, 5000620008 |
| Portable Generator, 50Hz | G3.3AI | 5000009036 |
| Portable Generator, 50Hz | G4.6AI | 5000009037 |
| 50Hz Portable Generator with E lectric Start | GS4.6AI | 5000009038 |
| Portable Generator | G3.3AIT | 5000009460 |
| Portable Generator | G4.6AIT | 5000009461 |
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.
