Clean as necessary using water and a mild detergent.
External buildup may be removed using a wire brush,
taking care not to mar the surface of the plug.
Replace any damaged plug.
Sockets:
Inspect overall for cracks, dents or other damage.
Inspect inside socket for damage or debris.
Actuate all moving parts to ensure they operate freely with no scraping or binding.
Clean as necessary using water and a mild detergent.
Replace any damaged socket.
Assemblies:
Install the plug into the socket, making sure the parts connect easily and hold firmly.
Disconnect coupler, check that the plug and socket release easily and smoothly, with no scraping or binding.
On BL (ball lock) and SL Series (with locking sleeve),
rotate sleeve to the locked position and attempt to disconnect,
pulling firmly to ensure the coupler stays connected.
Rotate sleeve to the unlocked position, and ensure the coupler disconnects easily.
If any damage, binding or unintended disconnecting is found, both the coupler and plug should be replaced.