The Wacker Neuson Thermostat is a genuine OEM thermostat designed for the RD24-100, RD27-120, RD40-130, and RD45-140 series tandem rollers. Sourced directly from Wacker Neuson, this part meets the exact specifications of the original component installed at the factory, ensuring a correct, like-for-like replacement. Fitment spans the full range of standard, C, and O variants across the RD24 through RD45 tandem roller lineup, including.3-series machines. When your roller's cooling system needs attention, part number is the dependable, OEM-verified choice.
Key Features
- OEM-Calibrated Opening Temperature — Genuine Wacker Neuson thermostat rated to open at the precise coolant temperature your engine requires, maintaining the correct operating range without under- or over-cooling.
- Direct Drop-In Replacement — Matches the original housing dimensions and sealing surface of the RD-series cooling circuit, so the thermostat seats and seals correctly without rework.
- Broad RD-Series Compatibility — Fits RD24-100, RD27-120, RD40-130, and RD45-140 tandem rollers across standard, C (cab), and O (canopy) configurations, including .3-series variants.
- Protects Engine from Heat Stress — A functioning thermostat keeps coolant circulating at the right temperature; a stuck-closed or stuck-open unit leads to overheating or prolonged cold running, both of which accelerate engine wear.
- Genuine OEM Part — Supplied as a genuine Wacker Neuson component, carrying the part number 5100012872 and backed by Wacker Neuson's OEM parts program for verified authenticity.
The thermostat is a temperature-sensitive valve in the engine's cooling circuit that controls when coolant flows to the radiator. When the engine is cold, it stays closed to help the engine reach operating temperature quickly; once the engine warms up, it opens to allow coolant to circulate through the radiator and shed heat. On compaction equipment like tandem rollers, where engines work hard in varying ambient conditions, a properly functioning thermostat is critical — a failed thermostat can cause chronic overheating, poor fuel combustion from running too cool, or engine damage that far outweighs the cost of a simple part replacement.
Part Details
| Part Number | 5100012872 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Thermostat |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD24-100 Tandem Roller | RD24-100 | 5100011385 |
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD24-100 C Tandem Rollers | RD24-100 C | 5100011387 |
| RD27-120 C Tandem Roller | RD27-120 C | 5100011388 |
| RD24-100 O Tandem Roller | RD24-100 O | 5100011389 |
| RD27-120 O Tandem Roller | RD27-120 O | 5100011390 |
| RD40-130 Tandem Roller | RD40-130 | 5100011391 |
| RD45-140 Tandem Roller | RD45-140 | 5100011392 |
| RD40-130 C Tandem Roller | RD40-130 C | 5100011393 |
| RD45-140 C Tandem Roller | RD45-140 C | 5100011394 |
| RD40-130 O | RD40-130 O | 5100011395 |
| RD45-140 O Tandem Roller | RD45-140 O | 5100011396 |
| RD 24-100.3 | RD 24-100.3 | 5100032197 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD24-100c.3 | RD24-100c.3 | 5100047370 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD24-100o.3 | RD24-100o.3 | 5100047372 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD45-140.3 | RD45-140.3 | 5100047396 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| RD45-140c.3 | RD45-140c.3 | 5100047398 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD45-140o.3 | RD45-140o.3 | 5100047400 |
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.
