Reverse clutch clearance

1. Measure the reverse clutch clearance.
   1. Install the reverse clutch into the end cover, and set the dial gauge.
   2. Secure the reverse clutch by lightly pressing down with a press, etc.
      Fig 1: Securing Reverse Clutch

      Courtesy of MAZDA MOTORS CORP.
   3. Apply compressed air to the part indicated in the figure and let the reverse clutch piston stroke three times.

      Air Pressure 

      392-441 kPa {4.0-4.5 kgf/cm ²  , 57-63 psi} 

   4. Apply compressed air and operate the reverse clutch piston. Read the value when the indicator of the dial gauge stops.
   5. Release the compressed air and read the dial gauge when the reverse clutch piston is not operating.
      Fig 2: Identifying Reverse Clutch Fluid Passage

      Courtesy of MAZDA MOTORS CORP.
   6. Calculate the reverse clutch clearance according to the following formula: Step (4) value - Step (5) value = Reverse clutch clearance.
   7. Measure the clearances at four locations (90° apart) by following the steps from (3) to (6). Verify that the average value is within the specification below.

      Reverse clutch clearance 

      1.00-1.30 mm {0.039-0.051 in} 

   Fig 3: Measuring Reverse Clutch Clearance

   Courtesy of MAZDA MOTORS CORP.
2. If not as specified, replace parts as necessary. (See CLUTCH COMPONENT DISASSEMBLY/ASSEMBLY .)

   3-4 clutch clearance 

1. Measure the 3-4 clutch clearance.
   1. Install the 3-4 clutch in the end cover and set the dial gauge.
   2. Secure the 3-4 clutch by lightly pressing down with a press, etc.
      Fig 4: Securing 3-4 Clutch

      Courtesy of MAZDA MOTORS CORP.
   3. Apply compressed air to the part indicated in the figure and let the 3-4 clutch piston stroke three times.

      Air pressure 

      392-441 kPa {4.0-4.5 kgf/cm ²  , 57-63 psi} 

      Fig 5: Identifying 3-4 Clutch Fluid Passage

      Courtesy of MAZDA MOTORS CORP.
   4. Apply compressed air and operate the 3-4 clutch piston. Read the value when the indicator of the dial gauge stops.
   5. Release the compressed air and read the dial gauge when the 3-4 clutch piston is not operating.
   6. Calculate the 3-4 clutch clearance according to the following formula:

      Step (4) value - Step (5) value = 3-4 clutch clearance.

   7. Measure the clearances at four locations (90° apart) by following the steps from (3) to (6). Verify that the average value is within the specification below.

   3-4 clutch clearance 

   1.10-1.40 mm {0.043-0.055 in} 

2. If not as specified, replace parts as necessary. (See CLUTCH COMPONENT DISASSEMBLY/ASSEMBLY .)

Fig 6: Measuring Clutch Clearance

Courtesy of MAZDA MOTORS CORP.

Bushing inner diameter inspection 

1. Measure the bushing of the 3-4 clutch hub.

   3-4 clutch hub bushing inner diameter 

   Standard: 18.000-18.018 mm {0.70866-0.70936 in} 

   Maximum: 18.038 mm {0.71016 in} 

2. If not as specified, replace the 3-4 clutch hub. (See CLUTCH COMPONENT DISASSEMBLY/ASSEMBLY .)
   Fig 7: Measuring Bushing Of 3--4 Clutch Hub

   Courtesy of MAZDA MOTORS CORP.
3. Measure the bushing of the 2-4 brake drum.

   2-4 brake drum bushing inner diameter 

   Standard: 55.005-55.030 mm {2.16555-2.16653 in} 

   Maximum: 55.050 mm {2.16732 in} 

4. If not as specified, replace the 2-4 brake drum. (See CLUTCH COMPONENT DISASSEMBLY/ASSEMBLY .)
   Fig 8: Measuring Bushing Of 2--4 Brake Drum

   Courtesy of MAZDA MOTORS CORP.