206336 - Woodward Formed Oil Seal O-Ring

206336 – Woodward Formed Oil Seal O-Ring

Available now on the Airparts.aero Marketplace.

Overview

The Woodward 206336 is a genuine OEM, formed oil seal, a flight-critical component engineered for use on a wide variety of Woodward propeller governors. This is not a standard, circular O-ring; it is a seal that has been precision-molded into a specific shape to fit the complex mating surfaces of the governor base and the engine accessory case. Fabricated from a high-performance, oil-resistant elastomer, the 206336 is designed to create a positive, leak-proof seal, preventing high-pressure engine oil from escaping the propeller control system. As a genuine Woodward part, it guarantees the material integrity and dimensional accuracy required for this critical application.

Key Features

• Precision-Formed Shape: Custom-molded to a specific, non-circular shape that perfectly matches the sealing groove on the base of numerous Woodward propeller governors. This ensures a perfect fit and uniform "squeeze" for a reliable seal.
• High-Performance Elastomer: Manufactured from a specialized synthetic rubber compound (typically a high-temperature Fluorocarbon or similar). This material is formulated to resist swelling, hardening, and degradation when in constant contact with hot, high-pressure engine oil.
• Positive High-Pressure Sealing: Designed to contain the high-pressure engine oil that is routed into the governor to actuate the propeller pitch change mechanism. A failure of this seal would result in a significant oil leak.
• Vibration Resistance: The resilient elastomeric material absorbs the micro-vibrations between the engine and the governor, allowing it to maintain a consistent, leak-free seal under all operating conditions.
• Genuine Woodward OEM Part: As a genuine factory component from the world's leading governor manufacturer, it guarantees the correct material compound, durometer (hardness), and precise dimensions required for a safe and airworthy installation.

Technical Specifications

• Part Number: 206336
• Manufacturer: Woodward, Inc.
• Component Type: Formed Oil Seal / Gasket
• Material: High-Temperature, Oil-Resistant Synthetic Rubber (Elastomer)
• Primary Application: Sealing the propeller governor to the engine accessory drive pad.
• Certification: FAA Production Approval

Aircraft Compatibility

The Woodward 206336 is a common service part for many of the most popular propeller governors ever made, making it applicable to a vast range of piston and turboprop aircraft.

• Common Engine Platforms:
  • Lycoming: IO-360, IO-540 series
  • Continental: IO-520, IO-550 series
  • Pratt & Whitney Canada: PT6A series
• Common Aircraft Platforms:
  • Beechcraft: Bonanza, Baron, King Air
  • Cessna: 210, 310, 421, Caravan
  • Piper: Seneca, Saratoga, Cheyenne
  • And countless other aircraft utilizing Woodward propeller governors.

Applicable Textron Aircraft

• Baron Series B55, E55, 58 or G58

List not comprehensive, may be applicable on other models.

Applications

The 206336 is an essential component for propeller system maintenance:

• Propeller Governor Installation: A mandatory replacement part any time a propeller governor is installed or reinstalled on the engine.
• Engine & Governor Overhaul: A key seal that is always replaced during engine or governor overhaul.
• Oil Leak Repair: The primary component to replace when troubleshooting an oil leak originating from the governor mounting pad.

Why Choose 206336?

A leak from the propeller governor base is a serious issue that can lead to rapid oil loss, a potential engine failure, and a significant fire hazard as oil is sprayed onto the hot engine. The Woodward 206336 is the only seal engineered by the governor manufacturer to perfectly fit the complex sealing surface of the governor base. Using a genuine Woodward part ensures that the material is fully compatible with engine oil and can withstand the operating temperatures and pressures without failure. For a flight-critical seal, there is no substitute for the quality and reliability of a genuine OEM part.

Order Your Woodward 206336 Seals Now

Ensure a leak-free, airworthy installation of your propeller governor with a genuine Woodward seal. Visit Airparts.aero to order your 206336 formed oil seals today.

The 206336 formed seal is a critical static seal in a highly dynamic system. The propeller governor is essentially a hydraulic pump that uses engine oil to control the propeller. The governor's mounting pad on the engine accessory case contains multiple passages—a high-pressure oil inlet, a return to sump outlet, and the splined drive shaft opening. A simple circular O-ring cannot seal this complex pattern of openings. The 206336 is "formed" with a specific shape that traces the perimeter of this entire interface, isolating the high-pressure passages from the low-pressure passages and sealing the entire assembly from the outside environment. Its precise shape is therefore fundamental to the correct function of the governor system.

Note: This is a single-use seal. It must be replaced every time the propeller governor is removed. Ensure both the engine accessory case pad and the governor base are meticulously clean, dry, and free of old gasket material or scratches before installing a new seal. Lubricate the seal with clean engine oil before assembly to prevent damage.