The Wacker Neuson is a genuine OEM O-Ring designed for the HSH700, HSH650, CUB400, and CUB700 series hydronic surface heaters and indirect-fired air heaters. As a factory-sourced component, this O-Ring matches the original material grade, durometer, and dimensional tolerances specified for these machines — ensuring a proper seal every time. Compatible across a wide range of configurations including skid-mounted, portable, and mobile indirect-fired diesel variants, as well as mobile drying systems in the MC5200 series, this is a versatile seal used throughout the Wacker Neuson heating equipment lineup. Keep part number on hand as a service spare to avoid unnecessary downtime during seasonal heating operations.
Key Features
- OEM-Grade Seal Material — Sourced directly from Wacker Neuson, this O-Ring meets the original compound and hardness spec for high-temperature, fuel-system, or fluid-circuit sealing in heating equipment.
- Drop-In Replacement — Dimensionally identical to the original, this O-Ring seats correctly in its groove without trimming, stretching, or shimming.
- Broad Fitment Across Heating Equipment — Fits HSH700, HSH650, CUB400, CUB700, CUB700GM, CUB700M, and MC5200 series units across skid-mounted, portable, mobile, and genset-equipped configurations.
- Leak Prevention — A correctly seated O-Ring maintains a pressure-tight seal in fluid or air circuits; a deteriorated or missing O-Ring leads to leaks, pressure loss, and potential heater shutdown.
- Fuel and Fluid System Safety — In diesel heating equipment, a compromised O-Ring in a fuel or combustion-air circuit can cause fuel seepage or unsafe operating conditions; using the correct OEM seal is essential for safe heater operation.
An O-Ring is a circular elastomeric seal used to prevent the passage of fluids or gases between mating components — such as pipe fittings, pump housings, burner assemblies, and valve bodies. In diesel indirect-fired heaters and hydronic surface heaters, O-Rings appear throughout the fuel delivery, water circuit, and combustion air systems, where they must maintain a reliable seal under pressure and temperature cycling. When an O-Ring deteriorates, hardens, or takes a compression set, it can no longer conform to the mating surfaces, leading to leaks that reduce system efficiency or create unsafe operating conditions.
Part Details
| Part Number | 5000172661 |
|---|---|
| Old Part Number | 0172661 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HSH700 | HSH700G | 5000620243 |
| Skid Mounted-Indirect Fired Ai r Heat, Diesel | CUB700 | 5000620213, 5000620687, 5000620207 |
| Skid Mounted-Indirect Fired Ai r Heater, Diesel | CUB400 | 5000620211, 5000620212, 5000620615 |
| HSH650 | HSH650 | 5000620991 |
| Mobile Drying System | MC5200 | 5000620201, 5000620232 |
| Mobile Indirect Fired Air Heat er, Diesel w/Genset | CUB700GM | 5000620759 |
| Mobile Indirect Fired Air Heat er, Diesel | CUB700M | 5000620758 |
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.
