The Husqvarna 740420300 O-Ring is a genuine OEM sealing component designed for DM280, DM340, and DMS280 concrete core drills as well as K3600, K950, and K2500 power cutters. As a direct OEM part, this O-Ring is manufactured to Husqvarna's exact material and dimensional specifications, ensuring a proper seal wherever it is installed. DHS Equipment supplies this part to help keep your equipment running at full performance. Cross-reference part number 740420300 against your machine's parts diagram to confirm the correct installation point before ordering.
Key Features
- OEM Material Specification — Manufactured to Husqvarna's exact compound and durometer rating, ensuring the correct compression and sealing performance for this application.
- Drop-In Sealing Fit — Dimensioned to seat precisely in the original groove, requiring no trimming or modification to achieve a proper seal.
- Broad Equipment Compatibility — Fits DM280, DM340, and DMS280 concrete core drills and K3600, K950, and K2500 power cutters, covering multiple machines with a single part.
- Leak Prevention — A correctly seated O-Ring maintains fluid or air pressure where needed; a worn or damaged ring allows leaks that can compromise lubrication, cooling, or hydraulic function.
- Fluid Containment Integrity — Using the correct OEM O-Ring prevents fluid contamination and protects surrounding components from premature wear caused by seepage.
An O-Ring is a circular elastomeric seal that sits in a machined groove to prevent the passage of fluids or gases between two mating surfaces or components. In core drills and power cutters, O-Rings are found throughout the water-feed system, hydraulic circuits, and gearbox assemblies, where maintaining a tight seal is critical to protecting internal components and sustaining cutting performance. When an O-Ring degrades, flattens, or cracks, the resulting leak can cause fluid loss, contamination of adjacent parts, and accelerated wear that leads to more extensive repairs.
Part Details
| Part Number | 740420300 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Concrete Core Drill | DM280 |
| Power Cutter | K3600 |
| Concrete Core Drill | DM340 |
| Power Cutter | K950 |
| Concrete Core Drill | DMS280 |
| Power Cutter | K2500 |
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.
