The Wacker Neuson is a genuine OEM Pump Timer Module Rd27 designed for the RD27-100 and RD27-120 ride-on tandem roller series. As a direct OEM replacement sourced through authorized Wacker Neuson channels, the meets the exact electrical and timing specifications required by the RD27 platform — no guesswork, no adaptation. This module fits across the full range of RD27-100 and RD27-120 configurations, including Pro and Basic Tier 4 Final variants, covering a broad span of serial number ranges. When the pump timer module shows signs of failure, replacing it promptly with the correct OEM part keeps the vibratory and hydrostatic systems operating as the machine was engineered to perform.
Key Features
- OEM-Matched Timing Circuitry — Engineered to the exact signal output and switching intervals specified for the RD27 hydrostatic vibratory system, ensuring the pump engages and releases on the correct cycle.
- Drop-In Electrical Compatibility — Connector pinout and mounting configuration match the original unit, allowing straightforward installation without rewiring or bracket modification.
- Broad RD27 Series Coverage — Confirmed fitment across RD27-100 and RD27-120 models in Pro, Basic, and standard configurations, including Tier 4 Final variants and multiple serial number ranges.
- Protects Pump System Integrity — A correctly functioning timer module prevents erratic pump activation that can accelerate wear on hydraulic components and cause uneven compaction output.
- Genuine Wacker Neuson OEM Part — Supplied as an authorized OEM component, so the part number 5200007990 matches the original specification exactly as it left the factory.
The pump timer module controls the timing and activation cycles of the vibratory pump system on the RD27 tandem roller. It sends timed electrical signals that govern when the pump engages, directly influencing the consistency and force of the drum vibration during compaction passes. When this module degrades or fails, operators may notice irregular vibration, loss of compaction performance, or the vibratory system failing to engage altogether — all of which compromise the quality of the finished asphalt or soil surface and can put additional strain on downstream hydraulic components.
Part Details
| Part Number | 5200007990 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Pump Timer Module Rd27 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 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 |
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.
