The Wacker Neuson Flexshaft Core Sm1S is a genuine OEM component designed for the M1000, M2000, M3000, A1500, A5000, L5000, and D4000 series electrical, gasoline, diesel, and battery-powered internal vibrator power units. As a direct Wacker Neuson OEM part, the is manufactured to the original design specifications, ensuring a correct, consistent fit across the wide range of compatible power unit configurations in these concrete vibrator families. This is the recommended replacement when the existing flexshaft core shows signs of wear, kinking, or reduced power transmission to the vibrator head.
Key Features
- Genuine OEM Torque Transmission: — Manufactured to original Wacker Neuson specifications, delivering consistent rotational output to the vibrator head without slippage or power loss.
- Drop-In Compatibility: — Sized and terminated to connect directly within the flexshaft housing of compatible M-series, A-series, L-series, and D4000 power units without alteration.
- Broad Series Fitment: — Confirmed for M1000, M2000, and M3000 series (120V, 230V, UL, non-CUL, and RFI variants), A1500, A5000, L5000, and D4000 internal vibrator power units.
- Sustained Vibration Output: — A worn or broken flexshaft core starves the vibrator head of drive power, causing incomplete concrete consolidation; replacing it restores full vibration frequency and amplitude.
- Multi-Platform Coverage: — A single part number covers electric, gasoline, diesel, and battery power unit variants, simplifying parts inventory for crews running mixed fleets.
The flexshaft core is the internal drive element that transmits rotational energy from the power unit motor down through the flexible conduit to the vibrator head. As the motor spins, the core winds that rotation through bends and curves in the hose, allowing the operator to position the head freely in the concrete form. When the core wears, kinks, or fractures, drive power is lost before it reaches the head, resulting in a sluggish or completely non-vibrating poker — leaving air voids and weak zones in the concrete pour. Replacing a failed core with part number 5000078331 restores full power transfer and ensures the vibrator head operates at its intended frequency for proper concrete consolidation.
Part Details
| Part Number | 5000078331 |
|---|---|
| Old Part Number | 0078331 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flexshaft Core Sm1S |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Electrical Power Unit for Inte rnal Vibrator | M3000/230 | 5000005800 |
| Electrical Power Unit | M2000/120 | 5000007653 |
| Electrical Power Unit for Inte rnal Vibrator | M1000/230 | 5000005041 |
| Electrical Power Unit for Inte rnal Vibrator | M1000/120/nonCUL | 5000005843 |
| Electrical Power Unit for Inte rnal Vibrator | M3000/120/nonCUL | 5000005845 |
| Electrical Power Unit for Inte rnal Vibrator | M2000/115/15A | 5000006305 |
| Electrical Power Unit | M2000/120/nonCUL | 5000007159 |
| Electrical Power Unit for Inte rnal Vibrator | M1000/230/RFI | 5000005494 |
| Electrical Power Unit for Inte rnal Vibrator | M2000/230/RFI | 5000005495 |
| Electrical Power Unit for Inte rnal Vibrator | M2000/230/n Gr | 5000006551 |
| M3000/230/RFI | M3000/230/RFI | 5000006590 |
| 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 |
| A1500-POWER UNIT,HONDA,35CC | A1500/035 ISO | 5000610324 |
| A1500 POWER UNIT, HONDA | A1500/035 ANSI | 5000610339 |
| L5000/225 ANSI | L5000/225 ANSI | 5000610341 |
| Drive Engine | M1000/120/UL | 5100006158 |
| Drive Engine | M2000/120/UL | 5100006159 |
| Drive Engine | M3000/120/UL | 5100006160 |
| 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.
