1. Engine Starting SystemsTechnical Training

2. Objectives: Understand a basic electric starting circuit Identify and explain the functions of starting system components Properly identify common starting system malfunctions 3. Basic Starter Circuit 4. Battery Supply electrical power to starter 5. Battery Configuration 6. Battery Checks Corrosion, dirt Cracks, or damaged case Leakage 7. Battery Checks 8. Starter Switch Provides drivers control for the starter. 9. Starter Cranks the engine over to start the engine. 10. Starter Specifications 50MT: Engine Type/Size: Diesel up to 29.5 L / 1800 cu in System Voltage: 12, 24, 32, 64 Volts Rotation: Clockwise or Counterclockwise Output: 10.7, 12, 16, 17.4 HP, 8.5, 9, 12, 13kW Standard Mountings: SAE #3 Standard Pinions: 11-Tooth/6-8 Pitch, 12-Tooth/8-10 Pitch, 12Tooth/Module 3 Weight: 79 lbs (35.8 kg) Drive Design: Rotatable drive housing, positive engagement, rubber shock absorber Overcrank protection: None 11. Wiring Connects all of the components together to allow electron flow. 12. Wiring Conductors Conducts Electron flow Insulators Prevents Electron Flow 13. Visual Checks Missing insulation Broken wires Burning smell 14. Visual Checks 15. Safety 16. Neutral Safety Switch 17. Neutral Safety Switch Allows starting ONLY when bus is in neutral. 18. Starter Relay 19. Starter Relay A relay is a control device that allows a small circuit to control a large circuit. 20. No Start Malfunctions Cranks, no start 21. No Start Malfunctions Clicks, no start 22. No Start Malfunctions No click, no start Ensure transmission is in neutral! 23. Remember YOU are our eyes and ears! The better your description is of what is happening, the faster our mechanics can properly diagnose the problem. 24. Questions 25. Good Luck Thank you for your time!Technical Training