The Husqvarna 740420400 O-Ring is a genuine OEM sealing component designed for a wide range of Husqvarna wall saws and power cutters, including the WS220, WS482, WS440, WS442, WS440HF, WS482HF, WS8, K950, K960, K970, K7000, and K3600. As a direct OEM replacement, this O-Ring is manufactured to Husqvarna's exact material and dimensional specifications, ensuring a proper seal every time. DHS Equipment supplies this part to help keep your equipment running at full capacity. Cross-reference part number 740420400 against your parts diagram to confirm fitment before ordering.
Key Features
- OEM-Grade Sealing Material — Manufactured to Husqvarna's exact compound and durometer specifications, delivering the compression and chemical resistance this application demands.
- Drop-In Replacement — Matches the original groove dimensions and profile, seating correctly without modification for a leak-free installation.
- Broad Husqvarna Fitment — Compatible with multiple WS-series wall saws and K-series power cutters, making this a versatile sealing component across Husqvarna's construction equipment lineup.
- Leak Prevention — A correctly seated O-Ring maintains hydraulic or fluid pressure at the joint, preventing fluid ingress or loss that can degrade machine performance or damage internal components.
- Fluid System Integrity — Using the correct OEM O-Ring ensures the sealing interface meets the pressure and temperature demands of professional construction use, reducing the risk of premature seal failure.
An O-Ring creates a static or dynamic seal at a joint, port, or fitting by compressing against mating surfaces to prevent fluid or air from passing through. In Husqvarna wall saws and power cutters, O-Rings are critical to maintaining hydraulic pressure and protecting internal components from contamination. When an O-Ring wears, cracks, or takes a permanent set, the resulting leak can cause pressure loss, fluid contamination, and accelerated wear to surrounding components — making timely replacement essential to keeping the machine operating correctly.
Part Details
| Part Number | 740420400 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Wall Saw | WS220 |
| Wall Saw | WS8 |
| Power Cutter | K7000 |
| Power Cutter | K3600 |
| Power Cutter | K960 |
| Power Cutter | K970 |
| Wall Saw | WS440HF |
| Wall Saw | WS482HF |
| Wall Saw | WS442 |
| Power Cutter | K950 |
| Wall Saw | WS482 |
| Wall Saw | WS440 |
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.
