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INTRODUCTION, This manual has been prepared to serve as a guide to railroad. personnel engaged in the operation of the 6600 horsepower. General Motors Model DDA40X turbocharged diesel electric lo. NOTICE The contents are divided into four sections as follows. The data appearing in this manual is intended as 1 General Description Provides general description of. a guide and as an aid in explaining the locomotive principal equipment components. equipment used during operation The informa, tion contained in the manual is based on data 2 Cab Controls Explains functions of cab control equip. available when released for printing Minor differ ment used in operating the locomotive. ences encountered in equipment are due to, changes made after the manual was sent to 3 Operation Outlines procedures for operation of the lo. press These changes will be covered in subse comotive. quent editions of this manual, 4 Trouble Action in response to trouble. A block of page numbers is allocated to each section Section 1. starting with page 101 Section 2 with 201 and the others fol. lowing in this manner Figures are identified by section and se. quence For example Fig 2 3 is the third figure used in Section. To obtain the most benefit from this manual it is recommended. that the sections be read in the sequence in which they appear. Information pertaining to maintenance adjustment and testing. is contained in the Locomotive Service Manual Instructions for. testing and maintenance of individual locomotive components. will remain a part of the standard EMD Maintenance Instruction. bulletin series or will be included in an electrical component. bench manual, INTRODUCTION, This manual has been prepared to serve as a guide to railroad.
personnel engaged in the operation of the 6600 horsepower. General Motors Model DDA40X turbocharged diesel electric lo. The contents are divided into four sections as follows. 1 General Description Provides general description of. principal equipment components, 2 Cab Controls Explains functions of cab control equip. ment used in operating the locomotive, 3 Operation Outlines procedures for operation of the lo. 4 Trouble Action in response to trouble, A block of page numbers is allocated to each section Section 1. starting with page 101 Section 2 with 201 and the others fol. lowing in this manner Figures are identified by section and se. quence For example Fig 2 3 is the third figure used in Section. To obtain the most benefit from this manual it is recommended. that the sections be read in the sequence in which they appear. Information pertaining to maintenance adjustment and testing. is contained in the Locomotive Service Manual Instructions for. testing and maintenance of individual locomotive components. will remain a part of the standard EMD Maintenance Instruction. bulletin series or will be included in an electrical component. bench manual, DDA40X Locomotive, DDA40X Truck, GENERAL DATA. Model Designation DDA40X, Locomotive Type D D 0880.
Locomotive Horsepower 6600, Maximum Loaded Weight On Rails Approx 540 000 lbs. Fuel Capacity Usable Fuel 8257 Gallons, Cooling Water 300 Gallons per Engine. Lubricating Oil Gallons per Engine Basic 243 Increased Capacity 395. Gallons of oil between Full and Low, on dip stick Basic 47 Increased Capacity 195. Sand 53 Cu Ft, Curve Negotiation, Truck lateral at bolsters 1 1 2 Nominal. Minimum curve capability in multiple, Includes truck lateral 295 radius 19 4 degree curve.
Minimum curve capability of unit coupled to 85, car Includes DD truck and car truck lateral 359 radius 16 degree curve. Designed to negotiate a No 8 crossover when, operated single in multiple or when coupled. to box car with lateral, GENERAL DATA Cont d, Major Dimensions. Distance Pulling face of front coupler to, pulling face of rear coupler 98 Ft 5 In. Width over sand boxes Approx 10 Ft 4 In, Height over horn mounted at fan hatch.
With 1 2 variable supplies measured, from top of straight and level track Approx 17 Ft 4 In. Diesel Engines 2 per locomotive, Model 645E 3 A, Number of Cylinders 16. Compression Ratio 14 5 1, Cylinder Arrangement 45 degree V. Cylinder Bore And Stroke 9 1 6 x 10, Operating Principle. 2 Stroke Cycle Turbocharger Aspirated Through Cylinder Wall Ports Multi Valve Exhaust Unit Fuel Injection Water Cooled Cylin. der Heads And Liners Oil Cooled Floating Pistons Isochronous Speed Governor Separate Overspeed Trip High Crankcase Pressure. Protection Ten Bearing Crankshaft and Drop Forged Connecting Rods. Full Speed 950 RPM, Idle Speed 320 RPM, GENERAL DATA Cont d.
Main Generator Model 2 per locomotive AR12, Maximum Generator Voltage DC 1450. Rectifier Diode Voltage Class 2200 2800, Maximum Continuous Current 4800. Companion Alternator D14, Nominal Voltage AC 950 RPM 215. Number of Poles 16, Frequency At 950 RPM 126 5, Auxiliary Generator 2 per locomotive. Basic Rating 1OKW, Voltage DC 74, Trucks Two interchangeable 8 wheel assemblies Fully flexible spring supported bolsters and.
journals with vertical and lateral friction dampers. Bolster centers 65 Ft, Truck wheel base 205 1 2 In. Air Brakes Clasp brakes operated by top mounted cylinders Type 26L. GENERAL DATA Cont d, Traction Motors, Model D77X3, Number of motors 8. Current Rating Max Continuous 1120 Amperes, Driving Wheels 8 Pair. Diameter 40 In, Gearing 59 18, Full Horsepower Low speed 28 3 MPH Nominal. Full Horsepower Max speed 82 MPH Nominal, Minimum Continuous Speed Full Throttle 11 3 MPH.
Gear Ratio Maximum Speed, Based on motor armature RPM 90 MPH 59 18 Gearing. 83 MPH 60 17 Gearing, 77 MPH 61 16 Gearing, 71 MPH 62 15 Gearing. TABLE OF CONTENTS, GENERAL DATA Cont d Page, SECTION 1 GENERAL DESCRIPTION 101. Air Compressor Two Per Locomotive Introduction 101. Type 2 Stage How The Locomotive Operates 102, Piston Pin Bearings Roller Type. Number of Cylinders 3 SECTION 2 ENGINE STARTING AND. Capacity At 950 RPM Approx 268 CFM CAB CONTROLS 201. Cooling Water, Two Pass Intercooler Introduction 201.
Lube Oil Capacity 10 1 2 Gal Engine Starting Controls 201. Storage Battery Switch And Fuse Panel 203, Number of Cells 32 Circuit Breaker Panels 208. Voltage 64 Engine Control Panel 213, Rating 8 hour 420 Ampere Hr Locomotive Controller 224. Mechanical Interlocks On The Controller 236, Air Brake Equipment 237. Brake Equipment Positions 242, SECTION 3 OPERATION 301. Introduction 301, Preparation For Service 301, Starting The Diesel Engines 307.
Trailing Unit Cab Inspection 309, Trailing Unit No 2 End Inspection 310. Starting Trailing Unit Diesel Engines 310, Placing Units On The Line 311. Precautions Before Moving Locomotives 312, Handling Light Locomotive 312. Draining Of Air Reservoirs And Strainers 313, Engine Air Box Drain 316. Cooling System And Cab Heater Drain Valves 316, Coupling Locomotive Units Together 318.
Coupling Locomotive To Train 319, TABLE OF CONTENTS Cont d SECTION 1. GENERAL DESCRIPTION, Pumping Up Air 319, Brake Pipe Leakage Test 320. Starting A Train 321 INTRODUCTION, Accelerating A Train 324. Drag Duty Power Control 325 The General Motors Model DDA40X locomotive illustrated in Figs 0. Operating Over Rail Crossing 325 1 and 1 1 is designed for heavy duty mainline service It is equipped. Running Through Water 326 with two separate and independent power units Each power unit con. Wheel Slip Correction 326 sists of a 3300 horsepower 16 cylinder turbocharged diesel engine di. Wheel Slip Light 327 rectly connected to a main generator which delivers power to four trac. Locomotive Speed Limit 328 tion motors each of which is geared to an axle and pair of driving. Mixed Gear Ratio Operation 329 wheels The four traction motors are located in a single truck Power. Dynamic Braking 329 from the No 1 engine is directed to the No 1 truck and power from the. Dynamic Brake Wheel Slide Control 332 No 2 engine to the No 2 truck. Double Heading 333, Operation In Helper Service 334. Isolating A Unit 334, The basic locomotive is arranged and equipped so that the short hood or.
Changing Operating Ends 334 cab end is considered the front or forward part of the unit However the. Stopping Engine 337 locomotive operates equally well in either direction. Securing Locomotive For Layover 338, Towing Locomotive In Train 339 The locomotive may consist of one or more individual units each of. Freezing Weather Precautions 340 which is a completely functional power plant When coupled together. for multiple unit operation all can be simultaneously controlled from a. SECTION 4 OPERATORS RESPONSE single set of controls located in the cab of the lead unit This is accom. TO TROUBLE 401 plished through jumper cables connected between the units. Introduction 401 The general arrangement of equipment used on the locomotive is shown. in Fig 1 1 Each of the more important equipment components is num. bered and identified in this illustration, DESCRIPTION DESCRIPTION. HOW THE LOCOMOTIVE OPERATES, 4 The main traction alternator supplies high voltage AC to. The DDA40X locomotive consists of two independent power plants a power rectifier assembly which then delivers high volt. The No 1 power plant delivers power to the four motors in the No 1 age DC to the traction motors for locomotive pulling. truck The No 2 power plant delivers power to the four motors in the power. No 2 truck Each power plant receives signals from the locomotive op. erators station just as trailing units in a consist do 5 The companion alternating current generator furnishes. power to the static exciter various transductors various. control circuit modules the three radiator cooling fans. The following descriptive paragraphs approach a single power plant in. and the inertial separator blower motor, dependently and are so worded. 6 The auxiliary generator charges the storage battery and. 1 The fuel pump is driven by an electric motor which for fuel supplies low voltage direct current for control lighting. priming uses current from the storage battery Once the engine and heating circuits. is started and running the fuel pump motor uses current directly. from the auxiliary generator The fuel pump transfers fuel from 7 By means of cab controls low voltage circuits are estab. the fuel tank under the locomotive through a suction strainer a lished to actuate the engine governor and the switchgear. primary filter and engine mounted filters to the engine injectors in electrical cabinets This switchgear controls generator. Racks on the injectors are positioned by the engine governor to excitation and distribution of power. control the amount of fuel injected into the engine cylinders. 8 Four traction motors are located in each truck Each. 2 The diesel engine is started by means of two parallel connected traction motor is directly geared to an axle and pair of. 64 volt cranking motors that engage the engine flywheel ring driving wheels. gear when starting current is applied The storage battery sup. 9 The throttle electrically controls speed and power by ac. plies electric current to engage the starting pinions and rotate the. tuating a governor mounted on the engine and by tying. cranking motors the response of the locomotive power control system to. the throttle The main generator converts the engine s. 3 When the engine is running it supplies mechanical power mechanical power to electrical power which is then dis. through shafts and couplings to directly drive three electrical tributed to the traction motors through circuits estab. generators the air compressor the motor and generator blowers lished by various switchgear components in the electri. and engine mounted lube oil and cooling water pumps cal cabinet. 10 At locomotive start the throttle controls electrical de. 102 vices that provide rapid power response at a level con. sistent with smoothly controlled starting, DESCRIPTION.
Fig 1 1 General Arrangement, DDA40X Locomotive, DESCRIPTION. 11 During heavy drag operation control circuits allow op. eration at full power until traction motors become hot. After the motors have become hot power is controlled at. optimum levels that allow the locomotive to operate at. minimum continuous speed consistent with less power. ful locomotives that may be in the consist The control. also allows high current short time power at an opti. 12 At moderate and high operating speeds a load regulator. operates to maintain power output at the specific level. called for by throttle position This prevents the engine. from being overloaded or underloaded, 13 The air compressor supplies to the reservoirs air under. pressure used primarily for the air brakes The air. brakes are controlled by the operator through suitable. equipment in the cab, 14 Except for manual operation of cab controls the loco. motive operation is completely automatic Various, alarms and safety devices will alert the operator should. any operating difficulties occur, ENGINE STARTING AND CAB CONTROLS.
INTRODUCTION, A switch for fuel priming and engine cranking is located at the. equipment rack for each engine All other basic control equip. ment used during locomotive operation is at the following loca. 1 Cabinet mounted No 1 and No 2 switch and fuse panels. 2 Cabinet mounted No 1 and No 2 engine control panels. 3 Cabinet mounted No 1 and No 2 circuit breaker panels. is contained in the Locomotive Service Manual Instructions for testing and maintenance of individual locomotive components will remain a part of the standard EMD Maintenance Instruction bulletin series or will be included in an electrical component bench manual 1 INTRODUCTION This manual has been prepared to serve as a guide to railroad personnel engaged in the operation of the 6600

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