M/T Clutch System: Clutch: Inspection

Check of clutch disc ASSY
1. Use a caliper gauge to check the wear of the facing.
  
  Fig 1: Checking Clutch Disc ASSY Face Wear Using Caliper Gauge
  Courtesy of SUBARU OF AMERICA, INC.
  
  Limit: 0.3 mm {0.012 in} (rivet sinking volume)
  
  NOTE: Replace the clutch disc ASSY if below the limit.
2. Using a dial gauge and the SST, check the deflection of the clutch disc ASSY by turning it.
  SST 499747100
  
  Limit: 0.7 mm {0.028in}
  
  NOTE: Replace the clutch disc ASSY if above the limit.
  
  Fig 2: Checking Deflection Of Clutch Disc ASSY 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 ASSY.
  1. Worn spline
  2. Loose rivet
  3. Worn damper spring
    
    Fig 3: Identifying Spline, Rivet And Damper Spring
    Courtesy of SUBARU OF AMERICA, INC.
Check of clutch cover ASSY
1. Visually check the following items, and if any malfunction is found, replace the clutch cover ASSY.
  1. Loose thrust rivet
  2. Damaged or worn bearing contact area at the center of diaphragm spring
    
    Fig 4: Identifying Thrust Rivet And 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: Identifying Pressure And Strap Plate
    Courtesy of SUBARU OF AMERICA, INC.
Check of flywheel SUB-ASSY
1. Check for damage and wear at the facing sliding area and the ring gear.
  
  Fig 6: Identifying Flywheel SUB-ASSY And Ring Gear
  Courtesy of SUBARU OF AMERICA, INC.
  
  NOTE: If defective, replace the flywheel SUB-ASSY.
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-ASSY.
Check of clutch release bearing ASSY
1. Check for rotation stuck and noise by rotating while applying pressure in the thrust direction.
  CAUTION: Do not wash the clutch release bearing ASSY since it is filled with grease.
  
  NOTE: If any stuck or noise is observed, replace the clutch release bearing ASSY.
  
  Fig 7: Checking Clutch Release Bearing ASSY For Rotation Stuck And Noise
  Courtesy of SUBARU OF AMERICA, INC.