The Wacker Neuson Rocker Arm is a genuine OEM component designed for the G40 and G50 series portable generators. Sourced directly from Wacker Neuson, this rocker arm meets the original engineering specifications for the valve train system found across G40 and G50 generator models, including standard, mobile, and LATAM Premium configurations. As a genuine OEM part, it delivers the correct geometry, surface hardness, and pivot tolerancing required for proper valve actuation in these engines. If you're restoring engine performance or addressing a worn valve train, the is the correct direct replacement to specify.
Key Features
- OEM Valve Train Geometry — Manufactured to the exact pivot angle and contact-face profile of the original, ensuring correct valve lift and timing across the full RPM range.
- Drop-In Engine Replacement — Mounts directly onto the existing rocker shaft and aligns with the valve stem and pushrod without modification, preserving original engine tolerances.
- Broad G-Series Generator Fitment — Confirmed for G40 and G50 generator models, including standard, mobile, and G40 LATAM Premium 50Hz configurations.
- Sustained Power Output — A correctly functioning rocker arm maintains consistent valve timing, which directly supports stable engine output and steady generator load performance under continuous use.
- Genuine Wacker Neuson OEM Quality — Supplied as an authentic Wacker Neuson part, with the surface treatment and material grade specified for the engine's original service life expectations.
The rocker arm is a pivoting lever in the engine's valve train that transfers motion from the camshaft — via the pushrod — to open and close the intake and exhaust valves at precisely the right moment. In a generator engine running under continuous load, accurate valve timing is essential for efficient combustion, consistent power delivery, and controlled exhaust. When a rocker arm wears at its contact surfaces or pivot point, valve lift becomes inconsistent, leading to rough running, loss of power output, increased fuel consumption, and in severe cases, valve damage. Replacing a worn rocker arm with the correct OEM part restores proper valve train geometry and engine efficiency.
Part Details
| Part Number | 5200021274 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Rocker Arm |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Generator | G40 | 5200015906, 5200015907, 5200016640, 5100029184 |
| Generator | G50 | 5200015909 |
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.
