Maricopa Community Colleges  DIE108   19946-20086 
Official Course Description: MCCCD Approval: 07/22/08
DIE108 19946-20086 L+L 3 Credit(s) 5 Period(s)
Heavy Equipment Power Trains
Theory and laboratory activities dealing with transmissions, final drives, clutches, and troubleshooting. Defects and their causes, correction and repair emphasized.
Prerequisites: None.
Go to Competencies    Go to Outline
 
MCCCD Official Course Competencies:
 
DIE108   19946-20086 Heavy Equipment Power Trains
1. Define power train terms and symbols. (I)
2. Identify and describe basic power train components and their functions. (II)
3. Select fluids, friction, and gear drives. (III)
4. Perform basic clutch maintenance and inspection. (IV)
5. Trace power flow through a mechanical transmission. (V)
6. Trace power flow through a simple planetary gear set. (VI)
7. Explain the function of a torque converter. (VII)
8. Disassemble, identify parts, and describe the functions of a differential. (VIII)
9. Identify and troubleshoot several types of final drives. (IX)
10. Set up and adjust gear tooth contact patterns, describe different patterns, and diagnose failures. (X)
11. Identify types of Power Take Offs (PTOs) and diagnose failures. (XI)
Go to Description    Go to top of Competencies
 
MCCCD Official Course Outline:
 
DIE108   19946-20086 Heavy Equipment Power Trains
    I. Power Train Terms and Symbols
      II. Basic Components
          A. Clutch
          B. Transmission
          C. Differential
          D. Final drives
          E. Drive wheels sprockets
        III. Drives
            A. Friction
            B. Fluid
            C. Gear
          IV. Clutches
              A. Disc and plats
                1. Dry
                2. Wet
              B. Overrunning
                1. Roller
                2. Cam
                3. Sprag
              C. Cone
              D. Expanding Shoe
                1. Mechanical
                2. Centrifugal
              E. Band type
                1. Steering clutch
              F. Controls
                1. Mechanical
                2. Hydraulic
              G. Maintenance and troubleshooting
            V. Mechanical Transmission
                A. Types
                  1. Sliding gear
                    a. Parallel shafts
                    b. Inline shafts
                  2. Collar shift
                  3. Synchromesh
                B. Shift controls
                  1. Direct
                  2. Cam plate
                C. Adjustments
                  1. Linkage
                  2. Shaft preload
                D. Lubricants
                  1. Types
                  2. Viscosity
                  3. Compatibility
                E. Maintenance and troubleshooting
              VI. Hydraulic Assist Transmission
                  A. Hydraulic clutches
                    1. Control power flow
                      a. Friction discs and plates
                  B. Gear train
                    1. Countershaft
                      a. Parallel shaft configuration with clutches
                    2. Planetary
                      a. Simple
                      b. Compound
                  C. Hydraulic shift controls
                  D. Maintenance and troubleshooting
                VII. Torque Converter Transmission
                    A. Principles of operation
                    B. Major components
                      1. Converter section
                      2. Range gear section
                      3. Final drive section
                      4. Hydraulic control system
                    C. Maintenance and troubleshooting
                  VIII. Differentials
                      A. Principles of operation
                      B. Differential locks
                        1. Mechanical
                        2. Hydraulic
                        3. Automatic
                      C. Maintenance and troubleshooting
                    IX. Final Drives
                        A. Principles of operation
                        B. Types
                          1. Straight axle
                            a. Rigid axle shaft
                          1. Full floating
                          2. Semi floating
                    Go to Description    Go to top of Competencies    Go to top of Outline