The Husqvarna 505103501 O-Ring is a genuine OEM sealing component designed for a wide range of Husqvarna K Series power cutters and DM Series concrete core drills. As a direct OEM replacement, this O-Ring is manufactured to Husqvarna's exact material and dimensional specifications, ensuring a proper seal every time. Compatible machines include the K770, K970, K760, K750, K1PACE, DM280, DM340, DM540i, DM650, and many more across the K and DM families. DHS Equipment supplies this part to help keep your equipment running at full performance.
Key Features
- OEM-Grade Seal Material — Manufactured to Husqvarna's exact compound and durometer specifications, delivering the compression resistance and chemical compatibility required for hydraulic and fluid sealing in power cutting and core drilling applications.
- Drop-In Replacement — Sized to match the original groove dimensions exactly, this O-Ring seats without modification across all compatible machines.
- Broad Fitment Across K and DM Families — Fits an extensive range of Husqvarna K Series power cutters (including the K750, K770, K970, and K1PACE) and DM Series core drill motors (including the DM280, DM340, and DM650).
- Leak Prevention — A correctly seated O-Ring maintains internal pressure and prevents fluid ingress or egress, keeping the machine operating within designed tolerances and protecting surrounding components from contamination or wear.
- Verified OEM Part — Cross-reference part number 505103501 against your Husqvarna parts diagram to confirm fitment before installation.
An O-Ring creates a pressure-tight seal between mating surfaces or around moving shafts and ports within the machine's fluid or air circuits. In power cutters and core drill motors, O-Rings are critical to maintaining correct hydraulic or cooling-water pressure and preventing leaks that can damage internal components. When an O-Ring degrades — through heat cycling, chemical exposure, or mechanical wear — it loses its ability to compress and seal, resulting in fluid loss, pressure drop, or contamination that can affect cutting performance and accelerate component wear.
Part Details
| Part Number | 505103501 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Cutter | K7000 |
| Concrete Core Drill | DM280 |
| Concrete Core Drill | DMS240 |
| Concrete Core Drill | DM200 |
| Concrete Core Drill | DM230 |
| Power Cutter | K3600 |
| Power Cutter | K4000 |
| Power Cutter | K540i |
| Power Cutter | K6500II |
| Power Cutter | K760 |
| Power Cutter | K760II |
| Power Cutter | K770 |
| Power Cutter | K970 |
| Power Cutter | K1PACE |
| Power Cutter | K1270 |
| Power Cutter | K3000 |
| Concrete Core Drill | DM340 |
| Concrete Core Drill | DMS280 |
| Power Cutter | K650 |
| Power Cutter | K6500 |
| Power Cutter | K750 |
| Power Cutter | K960 |
| Concrete Core Drill | DM700 |
| Power Cutter | K1260 |
| Concrete Core Drill | DM540i |
| Concrete Core Drill | DM540iKIT |
| Concrete Core Drill | DM650 |
| Power Cutter | K2500 |
| Power Cutter | K40 |
| Power Cutter | K1250 |
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.
