The Wacker Neuson Spark Plug (J14Cr-U) is a genuine OEM component designed for the RD12A-90 Tandem Roller series, including the standard, Foldable ROPS, and double drum configurations. Sourced directly from Wacker Neuson, this OEM spark plug matches the original specification installed at the factory — ensuring correct heat range, electrode gap, and thread pitch for your machine's engine. Part number is the confirmed replacement for all RD12A-90 variants listed in this fitment, so you can order with confidence knowing this is the right part.
Key Features
- Correct Heat Range for the Application — The J14Cr-U specification matches the thermal demands of the RD12A-90 engine, preventing pre-ignition or fouling caused by an incorrect heat rating.
- OEM-Matched Electrode Gap — Ships with the precise electrode gap required for clean, consistent ignition — no adjustment needed before installation.
- Direct Thread-In Replacement — Matching thread pitch and reach mean this plug installs straight into the existing cylinder head port without modification.
- Broad RD12A-90 Series Coverage — Fits the standard RD12A-90 Tandem Roller, the Foldable ROPS model, and the double drum variant under a single part number.
- Protects Engine Starting Performance — A worn or fouled spark plug causes hard starts, misfires, and rough running on compact rollers; replacing with the correct OEM plug restores reliable ignition.
- Genuine Wacker Neuson Part — Supplied as an authentic OEM component, so materials, construction, and service life align with the original part your machine was built with.
A spark plug ignites the air-fuel mixture inside the engine cylinder, and the heat range of the plug is critical — it must dissipate combustion heat fast enough to avoid pre-ignition while staying warm enough to burn off carbon deposits. On a compact tandem roller like the RD12A-90, a plug that is out of specification can cause difficult cold starts, rough idle, or misfires that reduce compaction performance and put added strain on the engine. Replacing a worn plug with the correct OEM part restores clean ignition timing and helps the engine run at the efficiency it was designed for.
Part Details
| Part Number | 5000214868 |
|---|---|
| Old Part Number | 0214868 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Spark Plug (J14Cr-U) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12A-90 Tandem Roller | RD12A-90 | 5000620058, 5000620320, 5000620369 |
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.
