The Wacker Neuson Tappet Adjustment Screw is a genuine OEM component designed for the RD27-100 and RD27-120 series hydrostatic vibratory and tandem rollers. Sourced directly from Wacker Neuson, this part meets the exact dimensional and material specifications of the original, ensuring a proper fit without guesswork. It is compatible across multiple RD27 configurations, including Pro and Basic T4F variants, covering a wide range of serial number ranges within the RD27 family. When valve adjustment precision matters, installing the correct OEM screw is the most dependable way to restore proper engine performance.
Key Features
- Exact Thread and Dimensional Specification — Manufactured to the original Wacker Neuson tolerance spec, so the screw seats and locks correctly in the valve train without shimming or reworking.
- Genuine OEM Part — Sourced directly from Wacker Neuson; part number 5200010526 matches the original part installed on the production line.
- Broad RD27 Series Fitment — Fits RD27-100 and RD27-120 models across Hydrostatic Vibratory Roller, Ride-On Roller, RD27 Pro Tandem Roller, and both Pro and Basic T4F configurations.
- Restores Accurate Valve Clearance — A worn or damaged tappet adjustment screw leads to incorrect valve lash, causing rough running, loss of compression, and accelerated valve train wear. Replacing it returns clearances to specification.
- Direct Drop-In Replacement — Installs using standard valve adjustment procedures with no additional hardware or modification to the cylinder head assembly.
The tappet adjustment screw is a critical component in the engine's valve train, used to set the precise clearance between the rocker arm and the valve stem. Correct valve lash ensures the intake and exhaust valves open and close at the right moment, which directly affects engine power, fuel efficiency, and smooth operation. When this screw wears, corrodes, or loses its ability to hold adjustment, valve clearance drifts out of specification — leading to symptoms like ticking, hard starting, reduced power output, and in severe cases, valve or rocker arm damage.
Part Details
| Part Number | 5200010526 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Tappet Adjustment Screw |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Hydrostatic Vibratory Roller | RD27-100 | 5200005878, 5200023554, 5200005876, 5200021387 |
| Hydrostatic Vibratory Roller | RD27-120 | 5200005879, 5200014922, 5200023555, 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.
