The Wacker Neuson Valve Spring Retainer is a genuine OEM component designed for a wide range of Wacker Neuson equipment including MG5 portable generators, MDP3 trash pumps, MPU 29 reversible plates, and ML440 light towers. As a direct OEM replacement, this retainer is manufactured to the exact tolerances required to keep the valve train operating correctly across all listed models. Confirmed fitment spans multiple MG5 and MG5sd generator variants, MDP3 pump configurations, MPU 29 reversible plate compactors, and the full ML440 light tower series. When your valve spring retainer wears or fails, replacing it with the correct OEM part like the is the surest way to restore proper engine function.
Key Features
- OEM-Spec Retention Geometry — Manufactured to exact dimensional tolerances that lock the valve spring in the correct position, maintaining proper valve lift and seating across the full rpm range.
- Drop-In Engine Fitment — Engineered to seat directly onto the valve stem groove without rework, ensuring a straightforward swap during engine top-end service.
- Broad Model Coverage — Confirmed fit across MG5 and MG5sd portable generators, MDP3 trash pumps, MPU 29 reversible plates, and ML440 light towers in multiple configurations.
- Valve Train Stability — A correctly seated retainer keeps spring tension consistent, preventing valve float, misfires, and loss of compression that a worn or cracked retainer can cause.
- Genuine Wacker Neuson OEM Part — Sourced directly through the Wacker Neuson parts network under part number 5000404168, so you know the material grade and profile match the original specification exactly.
The valve spring retainer is a small but critical engine component that locks the valve spring onto the valve stem, holding it under constant compression so the valve opens and closes at precisely the right moment. Without a sound retainer, spring tension becomes inconsistent, which can lead to poor combustion, loss of power, and in severe cases, a dropped valve that causes serious internal engine damage. Replacing a worn or broken retainer promptly keeps the valve train in correct adjustment and protects the rest of the engine from secondary damage.
Part Details
| Part Number | 5000404168 |
|---|---|
| Old Part Number | 0404168 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Valve Spring Retainer |
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 |
| Trash Pumps | MDP3 | 5000630140, 5000630144, 5000630176, 5000630177 |
| Reversible Plates | MPU 29 | 5000630141, 5000630228 |
| 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.
