Changing injector lines

[Stan]

I have a fuel leak at an injector line hydraulic head connection. I was wondering what if anything has to be done after removing these lines. Does the system have to be purged of air? If so what is the procedure?

 

[WillWagner]

Make sure there is no debris in the delivery valve and check closely for rust at the line/delivery valve seat area on the lines, pump and nozzle. If there is, green scotch brite will remove it with out damage, clean it out with a generous helping of brake cleaner. It should self purge the air out. TORQUE the lines!