VALVE, PRIORITY (P/N 4558) - As Removed
P/N: 4558
Category: Valves & Actuators
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| As Removed | 1 Available |
Product Description
The 4558 is a priority valve for aircraft hydraulic systems that maintains critical pressure to essential functions during low-supply conditions. This valve restricts flow to non-essential circuits, ensuring landing gear and brake systems receive adequate hydraulic pressure when system demand exceeds available supply. Installed in-line within the hydraulic distribution path, it automatically prioritizes essential users through internal pressure-sensitive mechanisms.
Commonly found in Bombardier Learjet 55 hydraulic systems. Installation follows aircraft maintenance manual specifications; verify compatibility with your aircraft's Illustrated Parts Catalog before installation.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the VALVE, PRIORITY (P/N 4558)?
The 4558 is a priority valve for aircraft hydraulic systems that maintains critical pressure to essential functions during low-supply conditions. This valve restricts flow to non-essential circuits, ensuring landing gear and brake systems receive adequate hydraulic pressure when system demand exceeds available supply.
What hydraulic fluid type is the 4558 compatible with?
Hydraulic component compatibility depends on the aircraft system design. Common aviation hydraulic fluids include MIL-PRF-5606 (mineral-based), MIL-PRF-83282 (synthetic), and Skydrol (phosphate ester). Verify the VALVE, PRIORITY against your aircraft maintenance manual for fluid compatibility.
Does the 4558 come pressure-tested and certified?
Overhauled and repaired hydraulic components are pressure-tested per manufacturer specifications and include 8130-3 documentation. The VALVE, PRIORITY is available in: As Removed. Contact us for test documentation on your selected condition.
What is the turnaround time for hydraulic component orders?
In-stock hydraulic components ship same business day before 3 PM EST. We provide 24/7 AOG support at (904) 998-9101 for urgent hydraulic system needs. RFQ submissions are typically quoted within 24 hours.
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