The Wacker Neuson Rotor Assembly is a genuine OEM component designed for the G100, G120, and G130 series mobile generators. Sourced directly from Wacker Neuson, this is the exact assembly used in original production — same tolerances, same materials, same output specification as what came out of the factory. Fitment spans a broad range of G100, G120, and G130 configurations including standard, cold weather, custom, and Tier 4i variants, making it the go-to replacement for fleet operators and service technicians working across multiple unit specs.
Key Features
- Correct Electromagnetic Output Spec — Genuine OEM construction ensures the rotor meets the precise magnetic field and winding specification required for rated generator output — no voltage drop or frequency deviation caused by an undersized or mismatched core.
- Drop-In Fitment for G100, G120, and G130 — Engineered to the exact shaft dimensions and balance profile of these generator series, so the assembly seats and clears correctly without shimming or rework.
- Broad Model Coverage — A single part number covers standard, cold weather, custom, skid-mounted, Tier 3, and Tier 4i variants across the G100, G120, and G130 families — confirmed by Wacker Neuson's own fitment data.
- Sustained Power Generation — A correctly spec'd rotor maintains stable voltage and frequency under load. A worn or damaged rotor causes output fluctuation, overheating, and potential damage to connected equipment or downstream electrical systems.
- Electrical Safety Integrity — As a core electrical generating component, using a genuine OEM rotor assembly ensures the unit continues to meet rated insulation class and load ratings — important for jobsite compliance where generator output feeds tools, lighting, or sensitive controls.
The rotor assembly is the spinning core of the generator's alternator section. As the engine drives the rotor shaft, the rotating magnetic field induces an electrical current in the surrounding stator windings — this is what produces the AC power output the machine is rated for. A rotor that has suffered winding failure, bearing damage, or physical imbalance will cause erratic output voltage, excessive heat buildup, or a complete loss of power generation. Replacing it with the correct OEM assembly restores the generator to its original rated output and protects the rest of the alternator from secondary damage.
Part Details
| Part Number | 5100027221 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Rotor Assembly |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G120-GENERATOR, SKID, CUSTOM, DEERE T3 | G120 | 5000620654, 5000620653, 5200001320, 5000620652, 5200006901, 5200003159, 5200003856, 5200003854, 5200003855, 5200014467, 5200014468, 5200008715, 5000620311, 5200014466, 5000620309, 5000620310, 5200008353, 5200008350, 5200008351, 5200008349, 5100025818, 5100025840 |
| G130 Generator, Standard T4i | G130 | 5200023232, 5200023233, 5200023234, 5100045087, 5100045559, 5100045560, 5100045564, 5100045565, 5100045566, 5100049838, 5100049839, 5100049840, 5100036308 |
| G100 | G100 | 5100045086, 5100045498, 5100045499, 5100026957, 5100026958, 5100026959, 5100029211 |
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.
