Is this a Fuel Injection Pump with the Pneumatic Governor?

On a diesel vehicle that has sat for a long time there is a good chance that crud in the Fuel tank is plugging up the tank screen or the filters.

When you cleaned the Injectors I hope you kept the parts of each Injector Nozzle together as they are a mated assembly.

Also if you assemble one piece inside of the Injectors wrong it breaks off part of the Injector Nozzle.

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84 300D, 82 Volvo 244Gl Diesel