Vibration Diagnosis And Correction

• Specifications
  • Tire and Wheel Runout Specifications
  • Propeller Shaft Runout Specifications
  • Driveline Runout Specifications
• Diagnostic Information and Procedures
  • Vibration Analysis - Road Testing (EL-38792-A Electronic Vibration Analyzer)
    • Notes
    • Test Description
  • Vibration Analysis - Road Testing (CH-51450-NVH Oscilloscope)
    • Notes
    • Test Description
  • Component Rotational Speed Calculation
    • Notes
    • Tire Rotational Speed
    • Calculating Tire Revolutions Per Second, or Hz at Concern Speed
    • Calculating Propeller Shaft Revolutions Per Second, or Hz at Concern Speed
    • Component Rotational Speed Worksheet
  • Vibration Analysis - Tire and Wheel
    • Test Description
  • Vibration Analysis - Driveline
  • Vibration Analysis - Hub and/or Axle Input
    • Test Description
  • Vibration Analysis - Engine
    • Notes
    • Test Description
  • Engine Order Classification
    • Engine First Order Classification
    • Engine Firing Frequency Classification
    • Other Engine Order Classification
    • Engine Driven Accessories Related to Engine Order
  • Vibration Analysis - Engine/Accessory Isolation
    • Notes
    • Test Description
  • Vibration Analysis - Engine Balance
    • Notes
    • Test Description
  • Vibration Diagnostic Aids
  • Vibration Diagnostic Aids - Vibration Intermittent or Not Duplicated
    • Notes
    • Specific Conditions Can Affect the Condition
    • Temperature, Ground-Out, Accessory Load
    • Vehicle Payload
    • Roadway Selection
  • Vibration Diagnostic Aids - Vibration Duplicated, Component Not Identified
    • Notes
    • Aftermarket Add-On Accessories
  • Vibration Diagnostic Aids - Vibration Duplicated, Difficult to Isolate/Balance Component
    • Notes
    • Driveline Torque-Load Conditions
    • Difficult to System Balance the Driveline
  • Vibration Diagnostic Aids - Vibration Duplicated, Appears to Be Potential Operating Characteristic
    • Notes
    • Check Service Bulletins
  • Symptoms - Vibration Diagnosis and Correction
    • Notes
    • Symptom Tables
  • Vehicle-to-Vehicle Diagnostic Comparison
  • Tire and Wheel Inspection
    • Notes
    • Tire Wear
  • Tire and Wheel Assembly Runout Measurement - On-Vehicle
  • Tire and Wheel Assembly Runout Measurement - Off Vehicle
    • Notes
    • Wheel Runout Measurement - Tire Dismounted
  • Brake Rotor/Drum Balance Inspection
  • Hub/Axle Flange and Wheel Stud Runout Inspection
  • Tire and Wheel Assembly Isolation Test
    • Force Variation
    • Radial Force Variation
    • Lateral Force Variation
    • Isolation Test Procedure
  • Vibration in Service-Stall Test (Non-Torque Sensitive)
  • Vibration in Service-Stall Test (Torque Sensitive)
  • Transfer Case Output Flange Runout Measurement
  • Propeller Shaft Runout Measurement
  • Torque Tube Input Flange Runout Measurement
  • Pinion Flange Runout Measurement
    • Notes
    • System Balanced Flange
    • Non - System Balanced Flange
  • Differential Pinion Input Shaft Runout Measurement
  • Driveline Working Angles Measurement
    • Notes
    • Measurement Procedure
  • Propeller Shaft Phasing Inspection
• Repair Instructions
  • Tire and Wheel Assembly Balancing - Off Vehicle
    • Notes
    • Tire and Wheel Assembly Balancer Calibration
    • Tire and Wheel Assembly Balancer Calibration Test
    • Tire and Wheel Assembly Balancing Guidelines
    • Balancing Procedure
    • Wheel Weight Usage
  • Tire and Wheel Assembly Balancing - On-Vehicle
  • Tire-to-Wheel Match-Mounting (Vectoring)
  • Tire and Wheel Assembly-to-Hub/Axle Flange Match-Mounting
  • Driveline System Balance Adjustment
    • Notes
    • Adjustment Procedure Using Oscilloscope
    • Adjustment Procedure Using EVA
    • Adjustment Procedure Without Oscilloscope or EVA
  • Driveline Working Angles Adjustment
  • Propeller Shaft Phasing Correction
    • One Piece Propeller Shaft Phasing Correction
    • Multiple-Piece Propeller Shaft Phasing Correction
• Description and Operation
  • Vibration Theory and Terminology
    • Vibration Theory
    • Basic Vibration Terminology
    • Cycle
      • Notes
      • Vibration Cycles in Powertrain Components
    • Frequency
    • Amplitude
    • Free Vibration
    • Forced Vibration
    • Centrifugal Force Due to an Imbalance
    • Natural or Resonant Frequency
    • Resonance
    • Damping
    • Beating (Phasing)
    • Order
  • Electronic Vibration Analyzer (EVA) Description and Operation
    • Notes
    • EVA Vibration Sensor
    • EVA Software Cartridge
    • EVA Smart Strobe Function
    • EVA Strobe Balancing Function
    • Averaging/Non-Averaging Modes
    • EVA Display
  • Oscilloscope Diagnostic Kit Description and Operation
    • Notes
    • Oscilloscope Inputs
    • NVH Software Set-up
    • Oscilloscope NVH Display
    • Oscilloscope Balancing
    • Oscilloscope Balancing Software Set-up
    • Oscilloscope Balancing Display
  • Vibrate Software Description and Operation
  • Reed Tachometer Description
• Special Tools and Equipment