Woodward 186320, Relief Valve Copper Seal - Tempest PMA
Tempest AG186320-PMA
The Tempest AG186320 (Woodward OEM 186320) is an FAA-PMA replacement relief valve copper seal for Woodward applications.
- Helps prevent oil leakage at the relief valve interface by providing a deformable copper sealing surface that conforms under proper torque.
- Supports consistent pressure control by restoring the sealing integrity of the relief valve installation after removal or overhaul.
- Improves maintenance outcomes by replacing a high-risk reuse item that can lose sealing effectiveness once crushed.
This copper seal is commonly replaced during governor overhaul, relief valve service, and reseal work because crush seals are typically treated as single-use items in many approved procedures. PJi® supports aviation maintenance professionals with OEM-cross referenced sealing components used in constant speed propeller governor systems.
Installation notes
Always refer to the applicable aircraft and governor maintenance manual for complete installation procedures.
- Replace the seal whenever the relief valve is removed unless approved data allows reuse. Crush seals often lose sealing effectiveness after first installation.
- Inspect mating faces for nicks or scoring and clean thoroughly before installing a new seal.
- Torque the relief valve to the value specified in the approved Woodward governor maintenance manual to achieve correct crush and sealing.
Applications and fitment
Used on Woodward propeller governor configurations where OEM 186320 is specified for the relief valve sealing interface. Confirm compatibility by matching the OEM part number and verifying the relief valve and seal callouts for your governor model and dash number in approved maintenance documentation.
Although copper crush seals are common in many hydraulic systems, aircraft governor applications require approved data and compliance with applicable certification requirements.
Tempest AG186320 is the direct replacement for OEM 186320. Confirm the relief valve seal callout and dimensions by governor model and approved maintenance data before ordering.
Pilot John International supplies Tempest PMA propeller governor components to propeller overhaul shops, FBOs, MROs, and aviation maintenance technicians supporting aircraft maintenance and ground support.
| General Information | |
|---|---|
| Part # | AG186320 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 1 x 1 x 0.1 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA |
| Material | Copper (verify temper and any replacement criteria in the approved maintenance manual) |
| OEM P/N | 186320 |
| Published dimensional reference | 0.875 in OD x 0.630 in ID x 0.023 in thickness (verify allowable limits and the exact sealing interface in the approved governor documentation) |
| Tempest P/N | AG186320 |
| Type | Copper crush seal or gasket for relief valve sealing interface on Woodward propeller governors |
Customers also viewed
AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Hawker Beechcraft | 58 - Baron , 95-C55 - Baron , 95-C55A - Baron |
PRODUCT REVIEWS
This item does not have any reviews yet.
QUESTIONS & ANSWERS
Tempest AG186320 is a direct FAA-PMA replacement for Woodward P/N 186320. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest A210780 Relief Valve Copper Seal is designed for use in aircraft equipped with Woodward model A210780 propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AG186320 Relief Valve Copper Seal provides a crush-type oil seal at the relief valve interface, preventing leakage under high pressure and maintaining the integrity of the internal governor pressure. Maintaining a reliable seal in the pressure regulation system helps ensure consistent RPM control and reduces the risk of oil loss and performance degradation in the propeller governor.
PJi offers the Tempest AG186320 as an FAA-PMA-approved replacement for the Woodward 186320 relief valve copper seal. View our full selection of Tempest propeller governor parts to find the correct component for your application.
For a deeper look at how propeller governors work, why proper maintenance matters, and how to identify compatible replacement components, refer to our Ultimate Guide to Aircraft Propeller Governor Maintenance.
