The Wacker Neuson Chalwyn Valve D70-Am-89 is a genuine OEM component designed for the G50 and G70 portable generator series. Sourced directly through Wacker Neuson's authorized parts program, this valve carries the exact specification required for these skid-mount and mobile generator configurations, including Tier 3 and Tier 4i emissions variants. Fitment covers multiple G50 and G70 build configurations — cross-reference your model number before ordering to confirm compatibility.
Key Features
- Correct Valve Geometry for Engine Protection — Machined to the D70-Am-89 specification, ensuring the valve seat, flow rate, and actuation threshold match the original engine shutdown system design.
- Genuine OEM Part — Supplied under Wacker Neuson part number 5200008203, this is the same component installed at the factory — no substitutions, no spec guesswork.
- Broad G-Series Generator Coverage — Fits multiple G50 and G70 generator variants, including skid base, custom, mobile, Tier 3, and Tier 4i configurations across a wide range of machine numbers.
- Engine Overspeed and Contamination Shutdown — A correctly functioning Chalwyn valve closes the air intake in response to hydrocarbon vapor or engine overspeed, preventing runaway and potential engine destruction.
- Safety-Critical Compliance — Chalwyn valves are a mandated safety device on many generator installations operating in potentially flammable or gas-rich environments; using the correct OEM-spec valve supports site safety compliance.
A Chalwyn valve is an automatic air intake shutoff device fitted to diesel engines. Its primary role is to stop the engine by cutting off the air supply if it detects hydrocarbon vapors being drawn into the intake — a condition that can cause uncontrolled overspeed, known as a runaway — or if engine RPM exceeds a safe threshold. On generator sets like the G50 and G70, this valve is a critical safeguard for operation in environments where fuel vapors or gas leaks may be present. When the valve fails or degrades, the engine loses this protection, creating a serious safety risk and a potential regulatory compliance issue on commercial and industrial job sites.
Part Details
| Part Number | 5200008203 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Chalwyn Valve D70-Am-89 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G70-GENERATOR, SKID, CUSTOM, DEERE T3 | G70 | 5000620648, 5200006879, 5200014464, 5200008341, 5100025814, 5100025838 |
| G50-GENERATOR, SKID BASE, CUSTOM T4i | G50 | 5200001062, 5200006878, 5100025812, 5100029210, 5100026955 |
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.
