SE1508-2 - Lord Shimmy Damper for Piper Aircraft

SE1508-2 – Parker Lord Shimmy Damper for Piper Aircraft

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Overview

The Parker Lord SE1508-2 is a flight-critical, OEM viscous shimmy damper for a wide range of Piper PA-28, PA-32, PA-34, and PA-44 series aircraft. This is not a shock absorber; it is a precision-engineered damping device whose sole and essential purpose is to prevent the violent, self-sustaining, and uncontrollable side-to-side oscillation of the nosewheel known as "shimmy." A shimmy event can lead to a loss of directional control during takeoff or landing and can impart destructive loads to the nose gear, engine mount, and firewall. The Lord SE1508-2 is designed to instantly and effectively quell these oscillations, ensuring safe and stable ground handling.

This damper operates on the principle of viscous fluid dynamics. Its sealed aluminum housing contains a proprietary, high-viscosity silicone fluid. As the nose gear attempts to shimmy, an internal rotor is forced to shear through this thick fluid. The fluid's resistance to this rapid motion creates a powerful damping force that is proportional to the shimmy velocity, immediately arresting the oscillation. The unit is a maintenance-free, sealed assembly, engineered by the world leader in vibration and motion control technology to provide the highest level of safety and reliability.

Key Features

• Genuine Parker Lord OEM Part: The original, factory-specified damper from the leader in motion control, ensuring the correct damping coefficient and performance for the Piper nose gear system.

• Superior Viscous Damping: Instantly dissipates the energy of a shimmy oscillation by converting it into heat within the silicone fluid, ensuring stable ground tracking.

• Temperature-Stable Silicone Fluid: Utilizes a proprietary high-viscosity silicone fluid whose damping properties remain consistent across an extremely wide range of ambient temperatures.

• Maintenance-Free Sealed Unit: A fully sealed, self-contained assembly that requires no servicing or fluid replenishment for its entire service life.

• Direct Replacement: Engineered as a direct, form, fit, and function replacement for the original Piper part, ensuring a straightforward and airworthy installation.

Technical Specifications

• Part Number: SE1508-2

• Component Type: Nose Gear Viscous Shimmy Damper

• OEM Manufacturer: Parker Lord

• Replaces Piper P/N: 454-706 and others.

• Damping Medium: High-Viscosity Silicone Fluid

• Housing Material: Anodized Aluminum Alloy

• Shaft Material: Hardened, Chrome-Plated Steel

Aircraft Compatibility

This shimmy damper is the specified OEM part for a vast fleet of Piper's most popular single and twin-engine aircraft, including:

• PA-28 Series: Cherokee, Warrior, Archer, Arrow, Dakota

• PA-32 Series: Cherokee Six, Lance, Saratoga

• PA-34 Series: Seneca

• PA-44 Series: Seminole

Note: This is a flight-critical component. The specific aircraft Illustrated Parts Catalog (IPC) for a given serial number is the final and absolute authority for determining part applicability.

Applications

• Nosewheel Stability: The primary device for the prevention and damping of nosewheel shimmy during all ground operations (taxi, takeoff, and landing rollout).

• Landing Gear System: A key component of the nose landing gear assembly, integral to safe directional control on the ground.

Why Choose SE1508-2?

A functional shimmy damper is a non-negotiable, flight-critical safety item. An undamped shimmy event can be surprisingly violent, leading to a loss of control and potentially causing thousands of dollars in structural damage to the aircraft in a matter of seconds. The Parker Lord SE1508-2 is the certified, OEM-quality solution. Its performance is precisely engineered to match the specific dynamic characteristics of the Piper nose gear. Using a non-certified, improperly overhauled, or leaking damper is an extreme safety risk. The proven reliability and temperature-stable performance of the genuine Lord damper is the only professional choice for ensuring the safety and integrity of your aircraft.

The key to the SE1508-2 damper's reliable performance is the material science of its polydimethylsiloxane (PDMS) silicone damping fluid. This is not a conventional oil. Silicone fluids are engineered polymers whose viscosity is remarkably stable over a very wide temperature range, a property measured as a high Viscosity Index. Unlike a hydrocarbon-based hydraulic fluid, which becomes extremely thick when cold and very thin when hot, this silicone fluid provides a consistent and predictable damping force whether the aircraft is taking off from a sub-zero runway in Alaska or landing on a 110°F afternoon in Arizona. The damping force is a direct function of the fluid's viscosity. By using a fluid whose viscosity is thermally stable, Parker Lord ensures that the damper's performance remains within its design specification across the entire flight envelope, a critical and non-negotiable safety feature.

Note: The SE1508-2 is a flight-critical component. It must be installed by a certified A&P/IA mechanic in accordance with the Piper maintenance manual. The attachment hardware must be correctly torqued. The damper must be carefully inspected at every pre-flight and scheduled inspection for any sign of fluid leakage, which typically appears as a collection of dirt and grime adhered to a thin film of leaked silicone fluid. Any leaking damper is considered un-airworthy and must be replaced immediately.

Documentation

• Parker Lord Website: Full application data, cross-reference guides, and technical information for Lord shimmy dampers are publicly available on the official Parker Lord website.