The Wacker Neuson Flexshaft Core Sm5S is a genuine OEM component designed for internal concrete vibrator power units across the M1000, M2000, M3000, A5000, L5000, and D4000 series. As a direct factory replacement, part ensures the flexible drive shaft assembly delivers consistent torque transmission from the power unit to the vibrator head. This part covers a wide range of electric, gasoline, diesel, and battery-powered drive units, making it a critical stocking item for concrete crews running Wacker Neuson internal vibrator systems.
Key Features
- Genuine OEM Torque Integrity — Manufactured to Wacker Neuson's original rotational load and flexibility specifications, so the core transmits power to the vibrator head without torsional slippage or premature fatigue.
- Direct Drop-In Replacement — Engineered to connect to the same drive coupling interfaces found on M-series, A-series, L-series, and D4000 power units, keeping installation straightforward for service technicians.
- Broad Power Unit Compatibility — Fits electric (M1000, M2000, M3000), gasoline (A5000, A1500), diesel (D4000), and L5000 series power units across multiple voltage and frequency configurations.
- Consistent Vibration Output — A worn or fractured flexshaft core causes erratic vibrator head speed and uneven concrete consolidation; a fresh OEM core restores full, steady vibration amplitude to the head.
- Operational Safety in High-Cycle Applications — Internal vibrators run continuously during pours; a compromised core can fail mid-pour and create consolidation voids. Replacing with part 5000078335 maintains drive system integrity throughout demanding concrete operations.
The flexshaft core is the inner rotating element of the flexible drive assembly that connects a concrete vibrator power unit to its vibrator head. As the power unit motor spins, the core transmits that rotational force through the flexible outer casing and down to the vibrator head, generating the high-frequency vibration needed to consolidate fresh concrete and eliminate air pockets. Over time, the core can develop metal fatigue, kink, or fray from repeated flexing and high-cycle operation — symptoms that show up as reduced vibrator head speed, intermittent vibration, or complete drive failure at the worst possible moment during a pour.
Part Details
| Part Number | 5000078335 |
|---|---|
| Old Part Number | 0078335 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flexshaft Core Sm5S |
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.
