The Husqvarna 505528401 Ventilating Valve is a genuine OEM replacement designed for a wide range of Husqvarna wall saws and power packs, including the WS220, WS440, WS440HF, WS442, WS482, WS482HF, WS8, PP440, PP440HF, PP480, PP480HF, PP492, and AD10. As a factory-original component, this valve is manufactured to Husqvarna's exact specifications, ensuring proper fit and function across all compatible units. Cross-reference part number 505528401 against your parts diagram to confirm compatibility before ordering. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Construction — Manufactured to Husqvarna's original specifications, ensuring the correct pressure rating and valve geometry for reliable hydraulic or pneumatic regulation in demanding construction environments.
- Direct Drop-In Replacement — Engineered to match the original mounting interface, allowing straightforward installation without modification to the valve housing or surrounding components.
- Broad Fitment Coverage — Compatible with multiple Husqvarna wall saw and power pack families, including the WS220, WS482HF, PP440HF, PP480HF, and PP492, making it a versatile service part across your equipment fleet.
- Maintains System Pressure Integrity — A correctly functioning ventilating valve regulates internal pressure and prevents pressure buildup that can damage seals, hoses, and internal components — keeping hydraulic systems operating within safe parameters.
- Part Number Verification — Always confirm part number 505528401 against your machine's parts diagram to ensure the correct valve specification for your specific model variant.
A ventilating valve controls the release and regulation of pressure within a hydraulic or fluid system, preventing excessive buildup that could compromise seals, damage internal components, or cause uncontrolled pressure events. In wall saws and power packs, this valve plays a critical role in maintaining stable system operation — particularly during sustained high-load cutting cycles where pressure fluctuations are common. When this valve fails or begins to leak, the system may experience erratic pressure, fluid loss, or reduced output performance, making timely replacement essential to restoring consistent operation.
Part Details
| Part Number | 505528401 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Ventilating Valve |
Compatibility & Fitment
| Name | Model |
|---|---|
| Power Pack | PP440 |
| Power Pack | PP492 |
| Power Pack | PP480HF |
| Wall Saw | WS482HF |
| Wall Saw | WS440HF |
| Concrete Core Drill | AD10 |
| Power Pack | PP480 |
| Wall Saw | WS442 |
| Wall Saw | WS440 |
| Wall Saw | WS482 |
| Wall Saw | WS220 |
| Wall Saw | WS8 |
| Power Pack | PP440HF |
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.
