The Wacker Neuson Exhaust Valve Retainer is a genuine OEM component designed for 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 same specifications as the original part, ensuring a correct, trouble-free installation without guesswork. The covers a broad range of Wacker Neuson equipment across multiple machine categories, making it a go-to stocking part for dealers and fleet operators running this engine family.
Key Features
- Genuine OEM Valve Retention Integrity — Manufactured by Wacker Neuson to exact original tolerances, ensuring the retainer seats and locks the exhaust valve securely without slippage or premature wear.
- Drop-In Installation — Matches the original mounting geometry and retainer groove dimensions, so the part installs directly without machining or fitment adjustments.
- Wide Equipment Compatibility — Fits MG5 portable generators, MDP3 trash pumps, MPU 29 reversible plates, and ML440 light towers across numerous serial configurations.
- Sustained Engine Sealing Performance — A properly functioning exhaust valve retainer holds valve stem seals and springs in correct alignment, supporting consistent compression and clean exhaust sealing across operating cycles.
- Verified Part Number — Order with confidence using part number 5000404157, confirmed across all listed Wacker Neuson model families to eliminate cross-reference errors.
The exhaust valve retainer is a small but critical engine component that locks the valve spring and keeper assembly onto the valve stem, holding the exhaust valve in proper position throughout the engine's intake and exhaust cycles. Without a correctly seated retainer, the valve spring can disengage, causing the valve to drop into the combustion chamber — resulting in catastrophic engine damage. Over time, retainers can crack, deform, or lose their grip due to heat cycling and mechanical stress, so replacing a worn or damaged retainer promptly protects the engine from more serious and costly failures.
Part Details
| Part Number | 5000404157 |
|---|---|
| Old Part Number | 0404157 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Exhaust Valve 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.
