Brake clearance

Measure the reduction brake clearance.

1. Set the dial gauge to the reduction brake.
2. Set the measuring point of the dial gauge to the retaining plate.
   Fig 1: Measuring Reduction Brake Clearance

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

   Air pressure 

   392 kPa {4.0 kgf/cm ²  , 57 psi} max. 

4. Apply compressed air and operate the reduction brake piston. Read the value when the indicator of the dial gauge stops.
5. Release the compressed air and read the dial gauge when the reduction brake piston is not operating.
   Fig 2: Applying Compressed Air To Reduction Brake Fluid Passage

   Courtesy of MAZDA MOTORS CORP.
6. Calculate the reduction brake clearance according to the following formula:

   Step (4) value-Step (5) value= reduction brake 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.

   Reduction brake clearance 

   1.50-1.80 mm {0.059-0.070 in} 

8. If not as specified, replace parts as necessary. (See REDUCTION BRAKE DISASSEMBLY/ASSEMBLY .)
   Fig 3: Measuring Reduction Brake Clearance

   Courtesy of MAZDA MOTORS CORP.

Differential Preinspection Backlash 

1. Measure the backlash of the side gear.

   Differential backlash 

   Standard: 0.05-0.15 mm {0.002-0.005 in} 

   Maximum: 0.5 mm {0.020 in} 

2. If not specified, replace the differential. (See DIFFERENTIAL DISASSEMBLY/ ASSEMBLY .)
   Fig 4: Measuring Backlash Of Both Side Gears

   Courtesy of MAZDA MOTORS CORP.