The Wacker Neuson Injection Pump Complete is a genuine OEM component designed for the HSH380S, HSH380B, E1250S, and E1250P hydronic surface heaters. Sourced directly from Wacker Neuson, this complete injection pump assembly ensures the fuel delivery system operates to the original engineering specification across all compatible heater configurations — including diesel, natural gas, and propane variants. Whether you're running an E1250P Premium Hydronic Heater or an HSH380S with generator, part number provides a verified, direct-fit replacement that restores proper burner function. Stocking this assembly means faster turnaround when fuel system service is required on your heating equipment.
Key Features
- Genuine OEM Fuel Delivery Accuracy — Manufactured to Wacker Neuson's exact flow-rate and pressure specifications for hydronic heater injection systems, ensuring consistent burner ignition and combustion performance.
- Complete Assembly, Ready to Install — Supplied as a full injection pump assembly, so all internal components are matched and pre-configured — no sourcing individual sub-components.
- Broad Heater Fitment — Confirmed fit across the HSH380S, HSH380B, E1250S, and E1250P heater families, covering diesel, LP/NG, and generator-equipped configurations.
- Restores Full Heating Output — A worn or failing injection pump causes inconsistent fuel delivery, leading to weak heat output, hard starts, or burner lockout. Replacing it with 5200018126 brings the system back to rated heating capacity.
- Fuel System Integrity — Correct pump specification is critical in hydronic heater applications; using a properly rated OEM injection pump reduces the risk of incomplete combustion and associated operational faults.
The injection pump is responsible for drawing fuel from the supply and delivering it at the correct pressure and volume to the burner assembly inside the hydronic heater. In hydronic surface heating systems like the HSH380 and E1250 series, consistent fuel injection is essential for maintaining steady heat output through the fluid circuit and into the surface being conditioned. When the injection pump degrades — through wear, contamination, or internal seal failure — fuel delivery becomes erratic, leading to burner misfires, reduced heating efficiency, or complete heater shutdown until the pump is serviced or replaced.
Part Details
| Part Number | 5200018126 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Injection Pump Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HSH380s | HSH 380S | 5100054643 |
| E 1250S Hydronic Heater, Standard, LP/NG | E1250S | 5200012354, 5200012355 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| E 1250P Hydronic Heater, Premium, LP/NG | E1250P | 5200012356, 5200012357 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359 |
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.
