The Wacker Neuson Water Pump Complete is a genuine OEM component designed for G40 and G50 series portable generators. Sourced directly through Wacker Neuson's authorized parts program, this assembly delivers the exact fit and flow characteristics the engine cooling system requires. It is confirmed compatible across multiple G40 configurations — including standard, mobile, and LATAM Premium variants — as well as the G50 generator, making it the correct choice for a wide range of units in the field.
Key Features
- Genuine OEM Cooling Circuit Integrity — Built to the same coolant flow rate and pressure tolerances as the original factory-installed pump, ensuring the engine thermal management system operates within its designed parameters.
- Complete Assembly, Ready to Install — Supplied as a complete unit with impeller and housing intact, dropping directly into the existing pump mounting position with no additional sub-components required.
- Broad G-Series Generator Fitment — Verified for G40 and G50 generator models, including standard, mobile, and LATAM Premium 50Hz configurations.
- Protects Engine from Thermal Damage — A correctly functioning water pump maintains consistent coolant circulation; a worn or failing pump can cause coolant starvation, overheating, and engine shutdown under load.
- Fuel System and Electrical Safety Alignment — Stable engine temperature directly protects generator electrical output components; overheating caused by pump failure can compromise voltage regulation and alternator windings.
The water pump is responsible for circulating coolant through the engine block and radiator, drawing heat away from critical internal components and maintaining a safe operating temperature. In a generator application, consistent thermal control is especially important because the engine runs at a steady load for extended periods with little opportunity to cool naturally. When the water pump wears out — through impeller erosion, seal failure, or bearing degradation — coolant flow drops, engine temperature climbs, and the unit will eventually shut down on overheat protection or sustain internal damage.
Part Details
| Part Number | 5200021427 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Water Pump Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Generator | G40 | 5200015906, 5200016640, 5100029184, 5200015907 |
| 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.
