I have a L2850 with a leaking injection pump. I've removed the holder delivery valve and replaced the copper washer and oring, but is still leaking out the threads. What else can I do other than pulling the pump and doing a complete rebuild?
There will be a washer farther down in that is leaking. You will need to pull the complete valve out of the pump. It has been a while since i had one apart but if you pull both halves of the valve out you will see what needs to be changed. Be carefull of the spring and needle valve. You will likely need a magnet to get the bottom half out.