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 trash pumps, the DS70 vibratory rammer, and E1100 ground heaters. As a direct OEM replacement, the is produced to Wacker Neuson's original specifications, ensuring consistent engine speed regulation across every compatible machine. This governor spring serves multiple equipment families — from pumps and heaters to rammers — making it a practical stocking part for service technicians and fleet operators who run mixed Wacker Neuson equipment.
Key Features
- Correct Spring Rate, Genuine OEM Spec — Manufactured to the original tension and load profile, so the governor responds accurately across the full RPM range of the engine.
- Drop-In Replacement — Engineered to match the original mounting points and hook geometry, allowing straightforward installation without reworking the governor linkage.
- Broad Equipment Compatibility — A single part number covers the HSH350 hydronic surface heater, PT2H and PT3H trash pumps, DS70 diesel rammer, and E1100 ground heater series.
- Steady Engine Speed Under Load — A correctly tensioned governor spring keeps engine RPM stable as load fluctuates, protecting pump output, compaction performance, and heat output from erratic speed swings.
- Engine Safety Relevance — A fatigued or broken governor spring can cause uncontrolled engine over-speed or hunting, making timely replacement important for safe, controlled machine operation.
The governor spring is a critical component of the engine's mechanical speed-control system. It works in opposition to centrifugal flyweights inside the governor assembly, creating the tension balance that holds engine RPM at the operator's set point. When load on the engine increases — say, a pump working against a higher head or a rammer hitting dense soil — the governor spring pulls the throttle open to compensate; when load drops, it works with the flyweights to reduce fuel delivery and prevent over-speed. A worn or broken governor spring causes the engine to hunt (surge repeatedly), run at incorrect RPM, or lose the ability to hold speed under varying load conditions, all of which degrade the performance and service life of the host machine.
Part Details
| Part Number | 5200007457 |
|---|---|
| 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, 5100014963, 5100014964 |
| PT2H Pump | PT2H | 5000009094, 5000009097 |
| 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.
