The Wacker Neuson is a genuine OEM Water Tank Cap designed for RD7 and RD27 series tandem rollers. Sourced directly from Wacker Neuson, this cap matches the exact specifications of the original component fitted at the factory. It is compatible across a wide range of RD7 variants — including the RD7A, RD7H, RD7He, and RD7Ye — as well as the RD27-100 and RD27-120 hydrostatic tandem rollers. Keeping the water tank properly sealed is essential for consistent drum wetting performance, and the Wacker Neuson ensures that seal is maintained without improvisation or adaptation.
Key Features
- Genuine OEM Sealing Integrity — Manufactured to Wacker Neuson's original material and thread specification, so the cap seals the water tank consistently under field conditions.
- Direct-Fit Replacement — Matches the original tank neck thread and cap profile on RD7 and RD27 series rollers, so installation is straightforward with no rework to the tank assembly.
- Broad RD7 and RD27 Coverage — Fits RD7A, RD7H, RD7He, and RD7Ye walk-behind tandem rollers, as well as RD27-100 and RD27-120 ride-on hydrostatic rollers across multiple build configurations.
- Protects Drum Wetting System — A secure cap prevents contamination, evaporation loss, and pressure loss in the water system, keeping the wetting system ready to deliver consistent water flow to both drums during asphalt compaction passes.
- Prevents Spillage and System Contamination — A worn or cracked cap allows debris and moisture intrusion into the tank, which can clog spray nozzles and disrupt even water distribution — this OEM cap eliminates that risk.
The water tank cap seals the drum-wetting water reservoir on vibratory tandem rollers. During asphalt compaction, water is continuously fed from this tank to the roller drums to prevent hot mix asphalt from sticking to the drum surface. A properly sealing cap maintains the tank's water volume, keeps the system free of debris, and allows the wetting system to operate as designed. When the cap is missing, cracked, or no longer sealing correctly, water loss and contamination can compromise drum wetting — leading to asphalt pickup on the drums and uneven compaction results.
Part Details
| Part Number | 5200000214 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Water Tank Cap |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD7 Tandem Roller | RD7A | 5100017196, 5200015243, 5200015246 |
| RD7 Tandem Roller | RD7He | 5100017193, 5100017194, 5200015241, 5200015244, 5100038031, 5100018451 |
| RD7 Tandem Roller | RD7H | 5100017195, 5100017338, 5200015242, 5200015245 |
| Hydrostatic Vibratory Roller | RD27-100 | 5200005878, 5200014868, 5200023554, 5200023556, 5200005876, 5200021387 |
| Hydrostatic Vibratory Roller | RD27-120 | 5200005879, 5200014869, 5200014922, 5200014923, 5200023555, 5200023557, 5200024441, 5200005877, 5200021389 |
| RD7Ye Tandem Roller | RD7Ye | 5100027116, 5100027117, 5100038032, 5100048340 |
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.
