Subaru LEGACY Service Manual page 37

3) Connect vacuum hose to brake booster.
4) Mount master cylinder onto brake booster.
5) Connect brake pipes to master cylinder.
6) Connect electric connector for brake fluid level
indicator.
7) Adjust operating rod of brake booster.
Standard: L
LHD: 144.6 mm (5.69 in)
RHD: 173.2 mm (6.82 in)
If it is not in specified value, adjust it by adjusting
brake booster operating rod.
8) Measure the clearance between threaded end of
stop light switch and stopper.
If it is not in specified value, adjust it by adjusting
position of stop light switch.
CAUTION:
Be careful not to rotate stop light switch.
Stop light switch clearance: A
0.3 mm (0.012 in)
BRAKE BOOSTER
BR-00078
L
BR-00076
A
BR-00079
BR-35
9) Apply grease to operating rod connecting pin to
prevent it from wearing.
10) Bleed air from brake system.
Tightening torque (Air bleeder screw):
8 N·m (0.8 kgf-m, 5.8 ft-lb)
11) Conduct road tests to ensure brakes do not
drag.
C: INSPECTION
1. OPERATION CHECK (WITHOUT GAUG-
ES)
CAUTION:
When checking operation, be sure to securely
apply the hand brake.
• Checking without gauges
This method cannot determine the exact portion
which has failed, but it can provide a rough under-
standing of the nature of the failure if checking is
conducted in accordance with the following proce-
dures.
• Air tightness check
Start engine, and run it for 1 to 2 minutes, then turn
it off. Depress brake pedal several times applying
the same pedal force as that used in ordinary brak-
ing operations. The pedal stroke should be greatest
on the 1st depression, and it should become small-
er with each successive depression. If no change
occurs in the pedal height while in a depressed
state, brake booster is faulty.
( 1 )
( 5 )
( 4 )
( 3 )
(1) OK
(2) NOT OK
(3) 1st
(4) 2nd
(5) 3rd
NOTE:
• In the event of defective operation, inspect the
condition of the check valve and vacuum hose.
• Replace them if faulty and conduct the test
again.
• If no improvement is observed, check precisely
with gauges.
BRAKE
( 2 )
BR-00080