The Wacker Neuson Square Key 3/16 X 5/8 is a genuine OEM component designed for the A3000, B3000, B5000, D4000, X3000, L5000/225, A5000/160, and A5000/160B series gasoline and diesel power units used with internal concrete vibrators. As a direct OEM replacement, part is sourced and manufactured to the same standards as the original, ensuring a precise mechanical fit within the drivetrain. This key is compatible with both ISO and ANSI configured units across the A5000 and L5000 families, making it a versatile stocking part for crews running multiple Wacker Neuson vibrator power units.
Key Features
- Genuine OEM Torque Transfer Accuracy — Manufactured to exact dimensional tolerances for the 3/16 x 5/8 keyway profile, ensuring full and consistent torque transfer without slippage or play.
- Drop-In Drivetrain Fit — Slots directly into the existing keyway on the shaft and mating component — no filing, shimming, or machining needed.
- Broad Power Unit Compatibility — Fits A3000, B3000, B5000, D4000, X3000, A5000/160, A5000/160B, and L5000/225 internal vibrator power units in both ISO and ANSI configurations.
- Protects Shaft and Hub Integrity — A correctly sized square key prevents keyway wear on both the shaft and hub bore — a worn or undersized key accelerates damage to both mating surfaces and leads to costly shaft replacement.
- Drivetrain Safety Assurance — A failed or missing key can cause sudden loss of drive to the vibrator head during operation; using the correct OEM key maintains positive mechanical engagement at all times.
A square key is a small but critical drivetrain component that locks a rotating shaft to a hub, gear, or coupling, transmitting torque between the two without slippage. In an internal concrete vibrator power unit, the key ensures the drive shaft and its connected component turn together as a single unit — if the key shears, becomes loose, or wears undersized, drive to the vibrator head is lost and both the shaft and hub keyway can suffer accelerated damage. Replacing a worn or missing key promptly with the correct OEM part protects the surrounding components and keeps the vibrator operating at full consolidation performance.
Part Details
| Part Number | 5000071989 |
|---|---|
| Old Part Number | 0071989 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Square Key 3/16 X 5/8 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Gasoline Power Unit for Intern al Vibrator | A3000 | 5000006237 |
| Gasoline Power Unit for Intern al Vibrator | B 3000 | 5000005829 |
| Gasoline Power Unit for Intern al Vibrator | B 5000 | 5000007522, 5000006307 |
| Power Unit for Internal Vibrat ors | X 3000 | 5000006251 |
| Diesel Power Unit for Internal Vibrator | D4000 | 5000009091 |
| A5000/160 ISO | A5000/160 ISO | 5000610325 |
| A5000/160 ANSI | A5000/160 ANSI | 5000610340 |
| Gasoline Power Unit for Intern al Vibrator | A5000 | 5000009213 |
| L5000/225 ISO | L5000/225 ISO | 5000610329 |
| L5000/225 ANSI | L5000/225 ANSI | 5000610341 |
| A5000/160B | A5000/160B | 5100068212 |
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.
