The Wacker Neuson Governor Spring is a genuine OEM component designed for ML440 Light Towers and MG5 series Portable Generators. As a direct OEM replacement, this spring is manufactured to the exact specifications Wacker Neuson requires for proper governor operation across the full ML440 and MG5 model range. Confirmed fitment spans multiple ML440 Light Tower configurations and MG5 and MG5sd Portable Generator variants, so you can order with confidence knowing this is the right part for your machine. Keep a spare on hand for scheduled maintenance or unplanned field repairs to get your equipment back to full operating spec quickly.
Key Features
- OEM Spring Tension Accuracy — Manufactured to Wacker Neuson's exact load and tension specification, ensuring the governor responds correctly across the engine's full operating range.
- Drop-In OEM Replacement — Engineered to seat and hook into the governor assembly exactly as the original, with no trimming or adaptation needed during installation.
- Broad ML440 and MG5 Fitment — Compatible with multiple ML440 Light Tower builds and MG5 and MG5sd Portable Generator configurations, covering a wide span of Wacker Neuson equipment in the field.
- Stable Engine Speed Control — A correctly tensioned governor spring maintains consistent RPM under changing load conditions, protecting the engine from hunting, surging, or overspeed events.
- Fuel System Safety Relevance — The governor spring is a critical fuel-control component; a fatigued or broken spring can cause uncontrolled throttle behavior, making timely replacement an important operational safety measure.
The governor spring applies mechanical force to the governor assembly, working against centrifugal flyweights to regulate engine speed and hold a steady RPM as electrical load or mechanical demand changes. Without the correct spring tension, the engine cannot maintain stable output — symptoms of a worn or broken governor spring include erratic RPM, surging, or an engine that overspeeds under light load. Replacing the spring with a genuine OEM part restores the precise balance the governor system needs to protect both the engine and the connected equipment.
Part Details
| Part Number | 5000406835 |
|---|---|
| Old Part Number | 0406835 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Governor Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Light Towers | ML440 | 5000630117, 5000630204, 5000630323, 5000630324, 5000630325, 5000630327 |
| Portable Generators | MG5 | 5000630137, 5000630143, 5000630233, 5000630254, 5000630224, 5000630229, 5000630237, 5000630239, 5000630252, 5000630308, 5000630310, 5000630334 |
| Portable Generators | MG5sd | 5000630202, 5000630214, 5000630236 |
| MG5 Generator | MG5d | 5000630211 |
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.
