The Wacker Neuson Tappet Adjustment Nut is a genuine OEM component designed for the RD11AEC and RD11A hydrostatic double drum vibratory rollers. Sourced directly from Wacker Neuson, this part meets the exact specifications required for proper valve train adjustment on these tandem roller models. Using the correct OEM Tappet Adjustment Nut ensures your valve clearances are set accurately and held securely under the sustained vibration and load conditions these machines operate in. Confirm part number against your machine's serial number before ordering to ensure a correct match.
Key Features
- OEM-Spec Thread Integrity — Manufactured to Wacker Neuson's exact thread pitch and hardness tolerances, so the nut holds valve clearance settings without backing off under engine vibration.
- Direct Valve Train Replacement — Installs in the same position as the original, working with the existing rocker arm and locknut arrangement for a straightforward service procedure.
- Confirmed Fitment — Compatible with RD11AEC and RD11A hydrostatic double drum vibratory rollers; always cross-reference your machine's serial number with part number 5000151776.
- Sustained Adjustment Retention — Correct valve lash is critical to engine efficiency and power output; a worn or incorrect nut allows clearances to drift, leading to rough running, increased wear, and hard starts.
- Genuine Wacker Neuson Part — Supplied as authentic OEM stock, ensuring material grade and dimensional accuracy match the original engine assembly specification.
The tappet adjustment nut is a small but critical component in the engine's valve train. It locks the rocker arm adjustment screw in position after valve clearance — commonly called "tappet clearance" — has been set to the manufacturer's specification. If this nut loosens or wears, the clearance setting drifts: too little clearance causes valves to run hot and burn; too much clearance produces a noisy, inefficient valve train and reduces engine power. On heavy-duty compaction equipment like the RD11 tandem roller, where the engine operates under continuous load and vibration, maintaining the correct tappet adjustment is essential to long engine life and consistent performance on the job.
Part Details
| Part Number | 5000151776 |
|---|---|
| Old Part Number | 0151776 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Tappet Adjustment Nut |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Hydrostatic Double Drum Vibrat ory Roller | RD11AEC | 5000007695 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11A | 5000007693 |
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.
