This article is on how to disassemble a Cummins 24v VP44 injector and thoroughly clean and then reassemble it.For starters, you need to refer back to injector removal and get all 6 Injectors removed from the engine. Once you got all six injectors out you can proceed to clean each injector. But something to be aware of there is small parts and these parts must be put back exactly the way it came apart. WARNING! Only disassemble and clean only 1 injector at a time.