The Wacker Neuson 5100003121 Motor Armature Complete is a genuine OEM component designed for the AR26/6 and ARFU26/6 series external concrete vibrators. As a direct factory-sourced replacement, this armature is built to the exact electrical and mechanical specifications required for proper motor operation across the full range of compatible voltage configurations. Confirmed fitment covers the AR26/6/042, AR26/6/042 cs, AR26/6/042 3.5kN, AR26/6/250, ARFU26/6/115 UK, ARFU26/6/120 US, and ARFU26/6/230 models. When your vibrator loses power or runs erratically, the 5100003121 restores full motor output and gets your concrete operations back on track.
Key Features
- Genuine OEM Winding Spec: — Wound and balanced to the exact resistance and output ratings Wacker Neuson specifies for AR-series external vibrator motors — no guesswork on voltage compatibility.
- Drop-In Motor Replacement: — Machined to factory shaft dimensions and bearing seat tolerances, allowing direct installation into the existing motor housing without modification.
- Wide Voltage Fitment: — Covers multiple voltage variants including 042V, 115V UK, 120V US, 230V, and 250V configurations across the AR26/6 and ARFU26/6 model range.
- Restores Full Vibration Output: — A worn or shorted armature causes loss of motor torque and inconsistent vibration frequency; this replacement brings output back to the rated eccentric force, including the 3.5kN variant.
- Electrical Safety Compliance: — As a primary electrical rotating component, using a genuine OEM armature maintains correct insulation class and grounding integrity within the motor assembly — critical for operator safety on jobsite electrical systems.
The motor armature is the rotating core of the electric motor inside an external concrete vibrator. It converts electrical current into mechanical rotation, which drives the eccentric weight that generates the vibrating force transferred to formwork or concrete molds. When the armature windings burn out, short circuit, or the commutator wears, the motor loses speed, runs hot, or fails to start entirely — stopping concrete consolidation work until the part is replaced. Keeping a serviceable armature in the motor ensures consistent vibration frequency and amplitude, which directly affects how well entrained air and voids are eliminated from a concrete pour.
Part Details
| Part Number | 5100003121 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Motor Armature Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| ARFU26/6/120 US | ARFU26/6/120 US | 5100004244 |
| ARFU26/6/230 | ARFU26/6/230 | 5100004243 |
| AR 26/6/042 cs | AR 26/6/042 cs | 5100003940 |
| ARFU26/6/115 | ARFU26/6/115 UK | 5100004245 |
| AR 26/6/250 | AR 26/6/250 | 5100003953 |
| AR26/6/042 | AR26/6/042 | 5100003120 |
| AR 26/6/042 3,5kN | AR 26/6/042 3,5kN | 5100004048 |
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.
