The Wacker Neuson Thermostat is a genuine OEM component designed for the RD18-80, RD18-100, and RD18-100C series tandem and vibration rollers. Sourced directly from Wacker Neuson, this thermostat meets the exact specifications of the original part it replaces, ensuring a direct, correct-fit installation with no guesswork. It is compatible across a broad range of RD18 series configurations, including US and SE variants, as well as the updated.3-suffix model lineup. Keeping your roller's cooling system properly regulated starts with the right part — and is the correct one for these machines.
Key Features
- OEM-Calibrated Opening Temperature — Manufactured to the precise thermal activation point specified by Wacker Neuson, so coolant flow is regulated exactly as the engine requires.
- Direct Drop-In Replacement — Matches the original housing seat, flange dimensions, and coolant port orientation for a straightforward swap with standard tools.
- Broad RD18 Series Coverage — Fits RD18-80, RD18-100, and RD18-100C variants including standard, US, SE, and .3-suffix models across multiple serial number ranges.
- Protects Engine from Thermal Stress — A correctly functioning thermostat prevents the engine from running too cool or overheating, both of which accelerate wear and reduce service life.
- Genuine Wacker Neuson OEM Part — Part number 5100012862 is an authorized Wacker Neuson component, verified against the original equipment bill of materials for these roller models.
A thermostat regulates engine coolant temperature by controlling when coolant is allowed to flow through the radiator. When the engine is cold, the thermostat stays closed, allowing it to reach operating temperature quickly. Once the correct temperature is reached, the thermostat opens and allows coolant to circulate through the radiator for heat dissipation. A failed or stuck thermostat — whether stuck open or closed — causes the engine to run outside its optimal temperature range, leading to poor fuel efficiency, accelerated wear, or overheating that can cause serious engine damage.
Part Details
| Part Number | 5100012862 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Thermostat |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD18-80 Tandem Roller | RD18-80 | 5100011382, 5100047360, 5100055774 |
| RD18-100 Tandem Roller | RD18-100 | 5100011383, 5100047361, 5100055775 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| Vibration Roller | RD18-80 SE | 5100044988 |
| Vibration Roller | RD18-100 SE | 5100044989 |
| RD 18-100 C | RD18-100c | 5100047362, 5100055776 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD18 | RD18-100.3 | 5100055947 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
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.
