The Wacker Neuson Heater Plug is a genuine OEM heater plug designed for the RD24-100, RD27-120, RD40-130, and RD45-140 series tandem rollers. Sourced directly from Wacker Neuson, this is the same part installed at the factory — ensuring a correct, trouble-free fit across all covered models. Compatibility extends to the standard, C, and O variants within each series, as well as the updated.3-generation machines, making the verified solution for a wide range of Wacker Neuson tandem roller configurations. When cold-start reliability is critical on the jobsite, fitting the correct OEM part is the straightforward choice.
Key Features
- OEM-Spec Heating Element: — Manufactured to Wacker Neuson's exact resistance and heat-output specification, delivering the precise pre-heat performance the engine management system expects.
- Direct Plug-In Replacement: — Matches the original thread pitch, body dimensions, and connector type for a straight swap with no modification to the cylinder head or wiring.
- Broad Tandem Roller Coverage: — Fits RD24-100, RD27-120, RD40-130, and RD45-140 series machines, including standard, C, O, and .3-generation variants.
- Dependable Cold-Weather Starting: — A properly functioning heater plug pre-warms the combustion chamber so the engine fires cleanly in low ambient temperatures; a failed plug leads to hard starts, excessive cranking, and unburnt fuel in the cylinder.
- Electrical Safety Compliance: — As an OEM electrical component, 5100012954 meets the voltage and current tolerances specified for the roller's glow system, preventing overload issues that an out-of-spec part could introduce.
A heater plug — commonly called a glow plug — is a small electric heating element threaded directly into the engine's combustion chamber. When the operator initiates a cold start, the plug draws current and rapidly heats the chamber air, raising it to a temperature where diesel fuel ignites reliably without extended cranking. On compact tandem rollers like the RD series, where machines are often started in cool morning conditions on paving and compaction sites, a healthy heater plug is essential for getting the engine running quickly and cleanly. When a heater plug fails, the result is difficult cold starts, increased engine wear from prolonged cranking, and potential fuel washing on cylinder walls — all of which are avoided by replacing a worn plug promptly with the correct OEM part.
Part Details
| Part Number | 5100012954 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Heater Plug |
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.
