Series 4000 Fuel System Technician Guide Table of Contents Page INTRODUCTION 1 SAFETY 1 DESCRIPTION OF FUEL SYSTEM 3 COMMON RAIL FUEL SYSTEM OPERATION 5 DETROIT DIESEL ELECTRONIC CONTROL (DDECIV) 9 COMPONENT REVIEW (INDEX) 15 HIGH-PRESSURE FUEL PUMP 17 LOW-PRESSURE DELIVERY FUEL PUMP 25 ELECTRONIC UNIT INJECTOR 31 FUEL RAILS AND LINES 37 FLOW LIMITER VALVES 53 C&I FUEL JUNCTION BLOCK AND SECONDARY FILTERS 57 MARINE SECONDARY FUEL FILTERS 61 ECM COLD PLATE (S) 63 FUEL LEAK MONITOR SYSTEM (MARINE) 65 DDEC SENSORS 67 FUEL SYSTEM PLUMBING REQUIREMENTS 68 DAVCO FUEL PRO FILTERS 70 FUEL SYSTEM PRIMING PROCEDURE 72 FUEL SYSTEM TROUBLE SHOOTING 74 TORQUE SPECIFICATIONS FOR FUEL SYSTEM COMPONENTS 78 SERVICE PUBLICATIONS 80 NOTES