The Wacker Neuson Lock Washer is a genuine OEM component designed for the HSH and E-series hydronic surface heaters and ground heaters, including the HSH700G, HSH650, E2200, E3000 ES, S3000, and E700M lines. As a factory-sourced part, the is manufactured to the same specification as the original, ensuring a direct, consistent fit across the full range of compatible Wacker Neuson heating equipment. Whether you are performing routine maintenance or a targeted repair, this lock washer slots in without adjustment, keeping your fastener assembly secure and your heater back in service quickly. Confirm your model number before ordering to ensure the is the correct washer for your specific configuration.
Key Features
- Genuine OEM Material Integrity — Hardened to the original specification, this lock washer delivers the correct bite and tension retention needed to keep fasteners secure under the thermal cycling and vibration loads typical of hydronic heating systems.
- Direct Drop-In Fit — Matched to the original bore diameter and thickness, the 5000167737 installs exactly as the factory part did — no filing, shimming, or modification needed.
- Broad HSH and E-Series Compatibility — Verified fitment across the HSH700G, HSH650, E2200, E3000 ES, S3000, and E700M hydronic surface heater and ground heater families.
- Fastener Security Under Heat Cycling — A failed or flattened lock washer allows fasteners to back out over time, leading to loose assemblies, fluid leaks, or component misalignment in the heating circuit. This OEM replacement restores the clamping integrity the system depends on.
- Part Number Confidence — Sourced directly from Wacker Neuson, part number 5000167737 is the exact reference used in the official parts documentation for these heater models — no guesswork on compatibility.
A lock washer is a small but critical fastener component positioned beneath a nut or bolt head to prevent the fastener from loosening due to vibration or repeated thermal expansion and contraction. In hydronic surface heaters and ground heaters, where components are routinely exposed to heat cycling, water pressure, and outdoor operating conditions, a worn or deformed lock washer can allow fasteners to gradually back out — potentially causing fluid leaks or mechanical looseness in key assemblies. Replacing a damaged lock washer promptly with the correct OEM part restores the clamping force that keeps the system operating as intended.
Part Details
| Part Number | 5000167737 |
|---|---|
| Old Part Number | 0167737 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HSH700 | HSH700G | 5000620243 |
| E2200 GROUND HEATER, W/ LIFT BAIL | E2200 | 5000620215, 5000620176, 5000620216, 5000620226, 5100017448, 5100017449 |
| E3000 ES Hydronic Surface Heater | E3000ES | 5000620968, 5000620967 |
| Hydronic Surface Heater w/ Gen erator, 3000 ft hose | S3000 | 5000620218, 5000620182 |
| HSH650 | HSH650 | 5000620991 |
| E3000 ES Ground Heater, 3kW Gen | E3000 | 5100017801 |
| Hydronic Surface Heater, 700m hose | E700M | 5000620195 |
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.
