The Husqvarna 531111070 Piston is a genuine OEM replacement component designed for the DM406 concrete core drill. As a direct factory-equivalent part, this piston is manufactured to the same specifications as the original, ensuring correct cylinder fit and proper compression for reliable drilling performance. DHS Equipment supplies this part to help keep your DM406 operating at full capacity.
Key Features
- OEM-Matched Compression Tolerancing — manufactured to Husqvarna's original bore and ring-groove dimensions, ensuring the correct compression ratio is maintained within the DM406 engine.
- Direct Cylinder Fit — engineered to drop into the existing cylinder bore without machining or modification, using the same pin bore and skirt profile as the factory original.
- DM406 Compatibility — confirmed fitment for the DM406 concrete core drill, so you can cross-reference part number 531111070 against your parts diagram with confidence.
- Restored Power Output — a worn or scored piston causes loss of compression, rough running, and reduced drilling torque; replacing it with this genuine piston restores full power delivery to the drill motor.
- Genuine Husqvarna Quality — sourced directly through Husqvarna's OEM supply chain, this piston meets the same material and dimensional standards as the component originally installed at the factory.
The piston is the core reciprocating component inside the engine cylinder, responsible for compressing the fuel-air mixture and transferring combustion force to the crankshaft via the connecting rod. In a high-demand tool like the DM406 core drill, the piston endures significant thermal and mechanical stress with every cycle. When a piston wears, cracks, or scores against the cylinder wall, compression drops, the engine loses power, and continued operation risks further damage to the cylinder and connecting rod. Replacing the piston promptly with a correctly specified part restores compression and protects the surrounding engine components.
Part Details
| Part Number | 531111070 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model |
|---|---|
| Concrete Core Drill | DM406 |
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.
