The rack controls the amount of fuel the engine gets, it defaults to wide open when the engine gets shut off. Now if its stuck you cant force the rack because it will break.
If the rack is stuck then you will need to flush out each injector and carefully work the plunger up and down on top of the injector. Once the plunger is free the fuel rod on the injector will move freely.
Dont over torque the fuel lines either, they can crack! Detroit fuel systems are simple, this is all pretty easy to do. As it was mentioned, Bus grease monkey on YouTube has videos on this and will probably make more sense seeing it than reading it
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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