Service Brake

Check the brake pedal free play by pulling up the pedal with a force of less than 10 N (1 kgf, 2 lb).
Brake pedal free play (Pulling up direction of pedal)

0.5 - 2.0 mm (0.02 - 0.08 in)

Fig 1: Checking Brake Pedal Free Play
Courtesy of SUBARU OF AMERICA, INC.
If the free play is out of specifications above, adjust the brake pedal as follows. < Refer to INSPECTION , Brake Pedal. >
Check the pedal stroke.
While the engine is idling, depress the brake pedal with a 500 N (51 kgf, 112 lb) load and measure the distance between the brake pedal and steering wheel. With the brake pedal released, measure the distance between pedal and steering wheel again. The difference between the two measured values must be the specified value or less. If the measured value is specification or more, there is possibility of entering air in hydraulic unit.

Brake pedal stroke A:

115 mm (4.5 in)/500 N (51 kgf, 112 lb) or less

Fig 2: Identifying Brake Pedal Stroke A
Courtesy of SUBARU OF AMERICA, INC.
Check to see if air is in the hydraulic brake line by the feel of pedal operation. If air appears to exist in the line, bleed it from the system.
Check for even operation of all brakes, using a brake tester or by driving the vehicle for a short distance on a straight road.