04-04-2016, 03:26 PM
The solenoid you're referring to in your photo is called "LFB" which is for controlling Load-Dependent Start of Injection, i.e. it receives pressure from the governor system and increases advance relative to the load on the engine, rather than just engine speed - that's what that thin pipe running down the front of the pump is for. The solenoid power on the front is just so you can increase the timing when cold - it's inactive once the engine speed/load increases enough as it moves past the amount of advance it increases.
Not required to be connected.
Not required to be connected.