Mitsubishi Lancer Evolution IX. Manual — part 487
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SERVICE SPECIFICATIONS
SERVICE BRAKES
35A-3
SPECIFICATIONS
Item
Specification
Master
cylinder
Type
Tandem type
I.D. mm
26.9
Brake
booster
Type
Vacuum type, tandem
Effective dia. of power
cylinder mm
205 + 230
Boosting ratio
4.5 (Brake pedal depressing force: 230 N)
Rear wheel hydraulic control method
Electronic brake-force distribution (EBD)
Front brakes Type
4-opposed piston, ventilated disc
Disc effective dia.
×
thickness mm
263
× 32
Wheel cylinder I.D. mm
40.0
× 2, 46.0 × 2
Pad thickness mm
10.0
Clearance adjustment
Automatic
Rear brakes
Type
2-opposed piston, ventilated disc
Disc effective dia.
×
thickness mm
252
× 22
Wheel cylinder I.D. mm
40.0
× 2
Pad thickness mm
9.0
Clearance adjustment
Automatic
SERVICE SPECIFICATIONS
M1351000300574
Item
Standard value
Limit
Brake pedal height mm
169.1
− 172.1
−
Brake pedal free play mm
3
− 8
−
Brake pedal to floorboard clearance mm
90 or more
−
Front disc brake pad thickness mm
10.0
Minimum 2.0
Front disc brake disc thickness mm
32.0
Minimum 29.8
Front disc brake disc run-out mm
−
0.03
Front disc brake drag force N
69 or less
−
Rear disc brake pad thickness mm
9.0
Minimum 2.0
Rear disc brake disc thickness mm
22.0
Minimum 20.4
Rear disc brake disc run-out mm
−
0.03
Rear disc brake drag force N
69 or less
−
Front wheel bearing axial play mm
−
0.05
Rear wheel bearing axial play mm
−
0.05
Brake booster push rod protruding amount mm
8.98
− 9.23
−
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LUBRICANTS
SERVICE BRAKES
35A-4
LUBRICANTS
M1351000400504
Item
Specified lubricant
Brake fluid
DOT3 or DOT4
Pad assembly
Repair kit grease
SEALANT
M1351000500415
Item
Specified sealant
Remark
Fitting
3M ATD Part No.8661 or equivalent
Semi-drying sealant
SPECIAL TOOLS
M1351000600434
Tool
Number
Name
Use
MB991568
Push rod adjusting
socket
Adjustment of the brake booster
push rod protrusion amount
MB990964
A
B
MB990964
A: MB990520
B: MB990619
Brake tool set
A: Disc brake
piston expander
B: Installer
• Pushing-in of the disc brake
piston
• Installation of the drum brake
wheel cylinder piston cup
MB990998
MB990998
Front hub remover
and installer
Provisional holding of the wheel
bearing
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ON-VEHICLE SERVICE
SERVICE BRAKES
35A-5
ON-VEHICLE SERVICE
BRAKE PEDAL CHECK AND
ADJUSTMENT
M1351000900510
BRAKE PEDAL HEIGHT
1. Turn up the carpet, etc. under the brake pedal.
AC006215AB
A
2. Measure the brake pedal height as illustrated.
Standard value (A): 169.1
− 172.1 mm [From
the surface of melting sheet (floorboard) to
the face of pedal pad]
3. If the brake pedal height is not within the standard
value, follow the procedure below.
(1) Disconnect the stop lamp switch connector.
(2) Loosen the stop lamp switch by turning it
approximately 1/4 turn anticlockwise.
(3) Remove the brake booster (Refer to
).
NOTE: With the master cylinder and brake
pipe connected, remove the brake booster
only.
AC006217AB
Clevis
(4) Adjust the brake pedal height by turning the
clevis.
NOTE: When the clevis is turned 180 degrees,
the pedal height is changed approximately 2.4
mm.
(5) Install the brake booster (Refer to
).
(6) Measure the brake pedal height, and ensure
that the measured value is within the specified
value. When it is out of the specified value,
repeat Step (3) - (6).
AC309282AE
0.5 - 1.0 mm
Stopper
Stopper
(7) Insert the stop lamp switch until its threaded
part touches the stopper. Then lock the stop
lamp switch by turning it approximately 1/4
turn clockwise, and confirm that the clearance
between the switch plunger and the stopper is
as shown.
CAUTION
Check that the stop lamp does not illuminate
when the brake pedal is not depressed.
(8) Connect the connector at the stop lamp
switch.
4. Return the carpet, etc.
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ON-VEHICLE SERVICE
SERVICE BRAKES
35A-6
BRAKE PEDAL FREE PLAY
AC006219AB
B
1. With the engine stopped, depress the brake pedal
two or three times, After eliminating the vacuum in
the power brake booster, press the pedal down by
hand, and confirm that the amount of movement
before resistance is met (the free play) is within
the standard value.
Standard value (B): 3
− 8 mm
2. If the brake pedal play is not within the standard
value, check the following, and adjust or replace if
necessary:
• Excessive play between the brake pedal and the
clevis pin, or between the clevis pin and the
brake booster operating rod
• Brake pedal height
• Installation position of the stop lamp switch, etc.
CLEARANCE BETWEEN BRAKE PEDAL
AND FLOORBOARD
1. Turn up the carpet, etc. under the brake pedal.
AC006220AB
C
2. Start the engine, depress the brake pedal with
approximately 500 N of force, and measure the
clearance between the brake pedal and the
floorboard.
Standard value (C): 90 mm or more [From the
surface of the floorboard to the face of pedal
pad]
3. If the clearance is outside the standard value,
check for air trapped in the brake line and
thickness of the disc brake pad. And then bleed
the air and replace the disc brake pad as required.
4. Return the carpet etc. to its original position.
BRAKE BOOSTER OPERATING TEST
M1351001000435
1. For simple checking of the brake booster
operation, carry out the following tests:
AC000870
Good
No good
AB
(1) Run the engine for one or two minutes, and
then stop it. If the pedal depresses fully the
first time but gradually becomes higher when
depressed succeeding times, the booster is
operating properly. If the pedal height remains
unchanged, the booster is defective. Go to
step 2.
AC000871AB
When engine
is stopped
When engine
is started
(2) With the engine stopped, step on the brake
pedal several times. Then step on the brake
pedal and start the engine. If the pedal moves
downward slightly, the booster is in good
condition. If there is no change, the booster is
defective. Go to step 3.
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