M/T Clutch System: Clutch: Inspection

Check of clutch disc assembly
1. Use a caliper gauge to check the wear of the facing.
  
  Fig 1: Checking Clutch Disc Assembly Wear
  Courtesy of SUBARU OF AMERICA, INC.
  
  Limit: 0.8 mm {0.031 in} (Depth to rivet head)
  
  NOTE: Replace the clutch disc assembly if below the limit.
2. Using a dial gauge and the SST, check the deflection of the clutch disc assembly by turning it.
  SST 499747100
  
  Limit: 0.7 mm {0.028in}
  
  NOTE: Replace the clutch disc assembly if above the limit.
  
  Fig 2: Checking Deflection Of Clutch Disc Assembly Using Dial Gauge And SST
  Courtesy of SUBARU OF AMERICA, INC.
3. Visually check the following items, and if any malfunction is found, replace the clutch disc assembly.
  1. Worn spline
  2. Loose rivet
  3. Worn damper spring
    
    Fig 3: Checking Splines, Rivets And Damper Springs
    Courtesy of SUBARU OF AMERICA, INC.
Check of clutch cover assembly
1. Visually check the following items, and if any malfunction is found, replace the clutch cover assembly.
  1. Loose thrust rivet
  2. Damaged or worn bearing contact area at the center of diaphragm spring
    
    Fig 4: Checking For Loose Thrust Rivets And Damaged Or Worn Diaphragm Spring
    Courtesy of SUBARU OF AMERICA, INC.
  3. Damaged or worn disc contact surface of the pressure plate
  4. Loose strap plate installation area
  5. Worn diaphragm spring sliding area
    
    Fig 5: Checking For Loose Strap Plates And Damaged Or Worn Pressure Plate Surface
    Courtesy of SUBARU OF AMERICA, INC.
Check of flywheel sub-assembly
1. Check for damage and wear at the facing sliding area and the ring gear.
  
  Fig 6: Checking Flywheel Sub-Assembly And Ring Gear
  Courtesy of SUBARU OF AMERICA, INC.
  
  NOTE: If defective, replace the flywheel sub-assembly.
2. Check for rotation stuck, noise, and excessive play by rotating while applying pressure in the thrust direction.
  NOTE: If defective, replace the flywheel sub-assembly.
Check of clutch release bearing assembly
1. Check for rotation stuck and noise by rotating while applying pressure in the thrust direction.
  CAUTION: Do not wash the clutch release bearing assembly since it is filled with grease.
  
  NOTE: If any stuck or noise is observed, replace the clutch release bearing assembly.
  
  Fig 7: Checking Clutch Release Bearing Assembly
  Courtesy of SUBARU OF AMERICA, INC.