The Wacker Neuson Valve Tappet is a genuine OEM component designed for ML440 Light Towers and MG5 series Portable Generators. As a factory-sourced part, the matches the original specification exactly, ensuring the valve train operates as intended across all covered models. Fitment extends to MG5, MG5d, and MG5sd generator variants, as well as Multifunction Floodlight Tower and Light Tower configurations built around the ML440 platform. When you need a direct, verified replacement, sourcing genuine Wacker Neuson parts eliminates the guesswork.
Key Features
- OEM Valve Geometry Compliance — Manufactured to Wacker Neuson's exact lobe profile and surface hardness specs, preserving correct valve lift and timing across the engine's service life.
- Drop-In Engine Installation — Machined to match the original bore clearance and contact face dimensions, so the tappet seats correctly in the valve gallery without fitting adjustments.
- Broad ML440 and MG5 Coverage — A single part number serves multiple ML440 Light Tower configurations and the full MG5, MG5d, and MG5sd Portable Generator lineup, simplifying parts procurement.
- Sustained Valve Train Efficiency — A correctly functioning valve tappet maintains consistent fuel intake and exhaust timing; a worn tappet causes erratic valve actuation, power loss, and accelerated camshaft wear.
- Genuine Wacker Neuson Part — Sourced directly from Wacker Neuson's authorized supply chain, so the part number, fitment data, and build quality are fully verified before it ships.
A valve tappet — also called a valve lifter — sits between the camshaft and the valve stem inside the engine, transferring the rotational motion of the cam lobe into the linear motion needed to open and close each valve. It acts as a contact follower, riding the cam profile and translating that movement with minimal friction to keep intake and exhaust timing precise. When a tappet wears flat, develops pitting, or loses its hardened surface, valve actuation becomes inconsistent, leading to rough running, reduced power output, increased fuel consumption, and eventual damage to the camshaft itself — making timely replacement critical to keeping the engine running cleanly and efficiently.
Part Details
| Part Number | 5000404162 |
|---|---|
| Old Part Number | 0404162 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Valve Tappet |
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.
