Maricopa Community Colleges  DIE104   19946-20086 
Official Course Description: MCCCD Approval: 07/22/08
DIE104 19946-20086 L+L 3 Credit(s) 4 Period(s)
Heavy Equipment Electrical Systems
Electrical components involved in maintenance and repair of starters, generators, regulators, switches, wiring circuits, battery and magneto ignition systems. Basic troubleshooting and schematic interpretation emphasized. Pneumatic functions shown.
Prerequisites: None.
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MCCCD Official Course Competencies:
 
DIE104   19946-20086 Heavy Equipment Electrical Systems
1. Explain basic principles and characteristics of electricity. (I)
2. Use meters and test lights in systems and component diagnosis. (I)
3. Identify types of circuits, and describe the terms used in wiring schematics. (I)
4. Test, replace, and maintain batteries. (II)
5. Define and explain electromagnetic induction. (III)
6. Troubleshoot and repair direct current charging systems. (IV)
7. Define and explain co-valence bonding of semiconductors. (V)
8. Troubleshoot and repair alternating current charging systems. (VI)
9. Troubleshoot and repair starting systems. (VII)
10. Troubleshoot and repair ignition systems. (VIII)
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MCCCD Official Course Outline:
 
DIE104   19946-20086 Heavy Equipment Electrical Systems
    I. Basic Electricity
        A. Construction of the atom
          1. Types of charges
          2. Characteristics of the atom
          3. Balance and unbalance state of outer valence ring
        B. Classification by outer valence ring
          1. Conductor
          2. Insulator
          3. Semiconductor
        C. Electron bond
          1. Movement of electrons
          2. Space in the atom
          3. Speed of electrons
        D. Theories of electricity
          1. Franklin
          2. Electron
        E. Electrical terms
          1. Electromotive force (E)
          2. Intensity (I)
          3. Resistance (R)
        F. Types of circuits
          1. Series
          2. Parallel
          3. Series parallel
        G. Ohm's Law and equations
          1. Total resistance
            a. Series circuit
            b. Parallel circuit
            c. Series parallel circuit
        H. Circuit defects
          1. Open
          2. Shorted
          3. Grounded
        I. Use of meters, test lights and jumpers
          1. Voltmeter
          2. Ammeter
          3. Ohmmeter
          4. Self-power test light
          5. Non-powered test light
          6. Jumper leads
        J. Electrical symbols and schematics
          1. Conventional type
          2. Military type
        K. Common point circuit diagnosis
          1. Six step diagnosis procedure
          2. Use of schematic in diagnosis
        L. Magnetism
          1. Rules of magnetism
          2. Magnetic induction
          3. Magnet insulator reluctance
          4. Type of magnetism
        M. Gauges, indicators, warning buzzers and lights
          1. Variable resistors
          2. Thermistors
          3. Voltage limiters
          4. Circuits
          5. Diagnosis
      II. Batteries
          A. Purpose
          B. Construction
          C. Rating
          D. Servicing
          E. Testing
        III. Electromagnetic Induction
            A. Magnet
            B. Motion
            C. Conductor
          IV. Direct Current (DC) Charging Systems
              A. Purpose
              B. Types of generators
              C. Controls of output
              D. Circuits
              E. System operation
              F. Troubleshooting, testing and repair
            V. Co-Valence Bonding of Semiconductors
                A. Silicon and germanium (common)
                B. Silicon doped with phosphorous or antimony
                C. Silicon doped with boron or indium
                D. Diodes and transistors
              VI. Alternating Current (AC) Charging Systems
                  A. Comparison with DC generator
                  B. Control of output
                  C. Circuits
                  D. Voltage contact regulator
                  E. Semi-transistorized regulators
                  F. Transistorized regulators
                  G. Troubleshooting, testing and repair
                VII. Starting Systems
                    A. Purpose and requirements
                    B. Principles of operation
                    C. Motor construction
                    D. Types of starter switches and operation
                    E. Type of starter drives and operation
                    F. Series parallel switches and circuits
                    G. Troubleshooting, testing and repair
                    H. Glow-plugs
                      1. Purpose
                      2. Circuits
                      3. Testing
                  VIII. Ignition Systems
                      A. Battery Type: Conventional
                      B. Battery Type: High Energy Ignition (H.E.I.)
                      C. Magneto type
                        1. Purpose
                        2. Components
                        3. Circuits
                        4. Basic operating principles
                        5. Construction, operation and testing of each component
                        6. Oscilloscope patterns and ignition timing
                        7. Cold timing
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