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 factory replacement, this part meets the exact material and dimensional standards set for the original assembly, ensuring the valve train operates exactly as intended. It fits across an extensive lineup of configurations within the MG5, MG5sd, MG5d, MDP3, MPU 29, and ML440 series, making it a high-demand service part for fleets running multiple Wacker Neuson machines.
Key Features
- OEM-Grade Retention Strength — Manufactured to the exact hardness and geometry specifications required to hold valve spring pressure consistently across the full engine cycle without fatigue or deformation.
- Drop-In Replacement — Matches the original retainer's dimensions and seating profile, allowing straightforward installation without reworking the valve spring or keeper grooves.
- Broad Wacker Neuson Compatibility — Fits MG5, MG5sd, and MG5d portable generators, MDP3 trash pumps, MPU 29 reversible plates, and ML440 light towers across numerous build configurations.
- Protects Valve Train Integrity — A properly seated retainer keeps the valve spring locked in position, ensuring correct valve timing and preventing misfires, loss of compression, or engine damage caused by valve float or drop.
- Engineered for Demanding Duty Cycles — Built to withstand the high-frequency loading and thermal cycling typical of continuous-run generator, pump, and compaction engine applications.
The valve spring retainer is a small but critical engine component that locks the valve spring in place by gripping the valve stem through a pair of tapered keepers. It holds the spring under compression so the valve closes fully and consistently after each combustion event. When a retainer cracks, wears, or fails to seat correctly, the valve spring can release, causing the valve to drop into the cylinder — an outcome that typically results in severe internal engine damage and immediate machine shutdown.
Part Details
| Part Number | 5000404160 |
|---|---|
| Old Part Number | 0404160 |
| 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.
