The Wacker Neuson Brush Spring is a genuine OEM component designed for the EHB 7 series SDS-max rotary demolition hammers, including the EHB 7M, EHB 7/115, and EHB 7/230 models. Sourced directly from Wacker Neuson, this spring ensures the carbon brushes maintain consistent, calibrated contact pressure against the motor commutator for stable current transfer under load. It is a direct-fit replacement for all listed EHB 7 variants, covering both 115V and 230V configurations.
Key Features
- Calibrated Brush Tension: — Engineered to apply the correct contact force for consistent electrical transfer to the motor commutator, preventing arcing and uneven brush wear.
- Genuine OEM Part: — Manufactured to Wacker Neuson's original specification, ensuring the spring rate and geometry match the motor housing exactly as designed.
- Direct-Fit for EHB 7 Series: — Compatible with EHB 7M, EHB 7/115, and EHB 7/230 SDS-max rotary demolition hammers; drops into the existing brush holder without modification.
- Protects Motor Longevity: — A fatigued or broken brush spring causes erratic brush contact, which accelerates commutator damage and leads to premature motor failure — replacing it early keeps the drivetrain intact.
- Electrical Safety Compliance: — Maintaining correct brush pressure is essential to safe motor operation in electric demolition tools; the OEM spring ensures the brush assembly performs within the original design parameters.
The brush spring sits inside the carbon brush holder of the EHB 7's electric motor and applies steady, consistent pressure to push the carbon brush against the rotating commutator. This constant contact is what allows electrical current to pass from the stationary housing into the spinning armature. When the spring weakens or breaks, brush contact becomes intermittent — causing sparking, power loss, overheating, and rapid wear to both the brush and the commutator surface. Replacing the spring at the first sign of brush-related issues is one of the most cost-effective ways to extend the service life of the hammer motor.
Part Details
| Part Number | 5000104259 |
|---|---|
| Old Part Number | 0104259 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Brush Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Electric Drilling/Chisseling H ammer, SDS-max, 115V | EHB 7M | 5000007850 |
| Rotary Demolition Hammer | EHB 7/115 | 5000007706, 5000007974 |
| Electric Drilling/Chisseling H ammer, SDS-max, 115V | EHB 7/230 | 5000007973, 5000007980 |
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.
