Subaru 1997-1998 Impreza Service Manual page 65

1 -5 [01581)
1 5. I nspect Brake Lines and Check Operation of Parking and Service Brake System
Brake booster
operating rod
Play at pin
Toe board
PERIODIC MAINTENANCE SERVICES
Brake switch
Adjusting nut
Stopper
Clevis pin
Clevis
Pedal play
1 - 3 mm
(0.04 - 0.1 2 in)
B1 HOO29A
Steering
wheel
G 1 H0104
If the free play is out of specifications above, ad­
just the brake pedal as follows:
( 1 ) Be sure engine is off. (No vacuum is ap­
plied to brake booster.)
(2) There should be play between brake
booster clevis and pin at brake pedal instal­
ling portion.
[Depress brake pedal pad with a force of
less than 1 0 N (1 kg, 2 Ib) to a stroke of 1 to
3 mm (0.04 to 0 . 1 2 in).]
(3) Depress the surface of brake pad by
hand.
(4) If there is no free play between clevis
pin and clevis, turn brake switch adjusting
nut until the c learance between stopper and
screw of brake switch becomes 0.3 mm
(0.01 in).
2) Check the pedal stroke.
While the engine is idling, depress the brake
pedal with a 490 N (50 kg , 1 1 0 Ib) load and
measure the distance between the brake pedal
and steering wheel. With the brake pedal re­
leased, measure the distance between the ped­
al and steering wheel again. The difference be­
tween the two measurements must be less than
90 mm (3.54 in) [with ABS, 95 mm (3.74 in)] . If·
the distance is more than specified, there is a
possibility air is in the inside of the hydraulic
unit.
Brake pedal reserve distance: A
With ABS
more than 95 mm (3. 74 in)/
490 N (50 kg, 1 1 0 1b)
Without ABS
more than 90 mm (3.54 in)/
490 N (50 kg, 1 1 0 1b)
3) 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.
4) Check for even operation of all brakes, using
a brake tester or by driving the vehicle for a
short distance on a straight road .
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