The Wacker Neuson Governor Spring is a genuine OEM component designed for a range of Wacker Neuson equipment including HSH350 hydronic surface heaters, PT2H and PT3H centrifugal trash pumps, the DS70 vibratory rammer, and E1100 ground heaters. As a direct OEM replacement, the is manufactured to the exact tension and dimensional specifications required to maintain proper engine speed regulation across all compatible machines. This governor spring fits multiple platforms within the Wacker Neuson lineup, making it a practical stocking part for operators and service technicians running mixed fleets. Confirm your model and machine number against the fitment list before ordering to ensure compatibility.
Key Features
- Genuine OEM Tension Calibration — Manufactured to the exact spring rate required for correct throttle and speed governor response on Wacker Neuson engines.
- Drop-In Replacement — Engineered to the same hook geometry and coil dimensions as the original, allowing straightforward installation on compatible governor linkages.
- Broad Fitment Across Wacker Neuson Families — Fits HSH350 hydronic surface heaters, PT2H and PT3H trash pumps, DS70 diesel rammer, and E1100 ground heaters in a single part number.
- Stable Engine Speed Under Load — A correctly tensioned governor spring holds consistent RPM as load fluctuates; a worn or stretched spring causes hunting, surging, or uncontrolled over-speed.
- Engine Safety Compliance — Proper governor spring function is critical to preventing over-speed conditions that can damage internal engine components or create unsafe operating situations.
The governor spring is a key component in the engine's mechanical speed-control system. It works against the centrifugal force of the governor weights to hold the throttle at the operator-set RPM — when the engine loads up and slows down, the spring pulls the throttle open to restore speed, and when load drops, it works with the governor to prevent over-revving. A fatigued or broken governor spring causes erratic engine speed, surging under load, or loss of RPM control, all of which reduce the effectiveness of the machine and can accelerate wear on other engine components. Replacing a worn governor spring restores stable, controlled engine performance and protects the engine from the stress of unregulated speed swings.
Part Details
| Part Number | 5000151321 |
|---|---|
| Old Part Number | 0151321 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Governor Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Hydronic Surface Heater | HSH350 | 5000620254, 5200001677 |
| PT3H Pump | PT3H | 5000009100, 5000009103, 5000009242, 5100014963, 5100014964 |
| PT2H Pump | PT2H | 5000009094, 5000009097, 5000009239 |
| E1100 GROUND HEATER | E1100 | 5000620172, 5200001676 |
| DS70H Vibratory Rammer, 13" Plastic Shoe EPA | DS70 | 5200010976 |
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.
