The Husqvarna 740420800 O-Ring is a genuine OEM sealing component designed for the PP440HF, PP440, PP480HF, PP480, and PP492 power packs. As a direct Husqvarna OEM part, it is manufactured to the exact material grade and dimensional tolerances required to maintain a proper hydraulic seal in these power pack units. This O-Ring is the correct replacement to restore sealing integrity and keep your power pack operating without fluid loss. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- OEM-Grade Sealing Material — Manufactured to Husqvarna's exact compound and compression specifications, ensuring the elastomer performs correctly under the pressure and temperature demands of these hydraulic power packs.
- Drop-In Replacement Fit — Dimensioned to match the original groove geometry exactly, allowing straightforward installation without modification or fitment guesswork.
- Broad Power Pack Compatibility — Fits the PP440HF, PP440, PP480HF, PP480, and PP492 power packs, covering both standard and high-frequency variants in this series.
- Leak-Free Hydraulic Performance — A correctly seated O-Ring maintains system pressure and prevents hydraulic fluid loss, which is critical for consistent output power and protecting downstream tooling.
- Verified Husqvarna OEM Part — Cross-reference part number 740420800 against your parts diagram to confirm the correct application before installation.
An O-Ring forms a compression seal between two mating surfaces or ports within the hydraulic circuit of a power pack. In units like the PP440HF and PP480HF, maintaining a tight hydraulic seal is essential — even a minor leak can cause a drop in output pressure, erratic tool performance, and potential damage to internal components over time. When an O-Ring hardens, cracks, or loses its elasticity, fluid bypass occurs and the power pack can no longer deliver consistent pressure to the connected tool. Replacing a worn O-Ring with the correct OEM component restores the seal and returns the system to full operating condition.
Part Details
| Part Number | 740420800 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Pack | PP480HF |
| Power Pack | PP480 |
| Power Pack | PP440HF |
| Power Pack | PP440 |
| Power Pack | PP492 |
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.
