Hi michael,

I assume you mean the fuel lines to the cooler? they are a push on type, You push the line towards the cooler, then pull back the outer 'ring' to disconnect, Then pull the line off the pipe. They have an internal O ring as a seal, and a barb type of ring fitting that clicks /locks when the line is pushed back over the pipe. To check its on, gently try and pull the line back off the pipe after fitting.

JC