Mitsubishi 380. Manual — part 298
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-26
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
REMOVAL AND INSTALLATION
M1351003700407
Required Special Tool:
• MB991568: Push Rod Adjusting Socket
Pre-removal Operation
• Strut Tower Bar Removal (Refer to GROUP 42, Strut
Tower Bar
).
• Battery Removal
• Brake Fluid Draining
Post-installation Operation
• Brake Fluid Supplying and Air Bleeding (Refer to
• Brake Pedal Adjustment (Refer to
).
• Battery Installation
• Strut Tower Bar Installation (Refer to GROUP 42, Strut
Tower Bar
).
15DB174A
25 ± 2 N·m
18 ± 2 ft-lb
6
1
2
7
11
15 ± 2 N·m
12 ± 1 ft-lb
2
9
10
14 ± 2 N·m
122 ± 25 in-lb
14
12
13
15
16
8
N
15 ± 2 N·m
12 ± 1 ft-lb
BRAKE MASTER CYLINDER
ASSEMBLY REMOVAL STEPS
1.
BRAKE FLUID LEVEL INDICATOR
SWITCH CONNECTOR
2.
BRAKE TUBE CONNECTION
5.
BRAKE MASTER CYLINDER
ASSEMBLY
6.
SPRING PIN
7.
BRAKE FLUID RESERVOIR
ASSEMBLY
8.
MASTER CYLINDER FLUID
RESERVOIR SEAL
9.
BRAKE FLUID LEVEL INDICATOR
SWITCH
10. BRAKE FLUID RESERVOIR CAP
BRAKE BOOSTER VACUUM
HOSE REMOVAL STEP
>>A<<
11. BRAKE BOOSTER VACUUM
HOSE
BRAKE BOOSTER ASSEMBLY
REMOVAL STEPS
1.
BRAKE FLUID LEVEL INDICATOR
SWITCH CONNECTOR
2.
BRAKE TUBE CONNECTION
5.
BRAKE MASTER CYLINDER
ASSEMBLY
>>B<<
•
PUSH ROD PROTRUSION
AMOUNT CHECK AND
ADJUSTMENT
>>A<<
11. BRAKE BOOSTER VACUUM
HOSE
12. BRAKE BOOSTER PIN
13. BRAKE BOOSTER PIN
ASSEMBLY
14. BRAKE BOOSTER NUT
15. BRAKE BOOSTER ASSEMBLY
16. BRAKE BOOSTER BODY SEAL
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-27
INSTALLATION SERVICE POINTS
.
>>A<< BRAKE BOOSTER VACUUM HOSE
CONNECTION
Insert vacuum hose with its paint mark facing upward.
.
>>B<< PUSH ROD PROTRUSION AMOUNT
CHECK AND ADJUSTMENT
1. Use the vacuum pump to measure dimension "A" applying a
negative pressure of 66.7 kPa (19.7 inHg) to the brake
booster.
Standard value (A): 5.0 mm
± 0.1
15DB175A
VACUUM HOSE
WHITE PAINT MARK
YELLOW PAINT MARK
15DB185A
A
MEASURING DISTANCE A
BLOCK GAUGE
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-28
2. If the protrusion amount is not within the standard value
range, adjust the push rod length by turning the push rod.
Use special tool MB991568 to turn the push rod while
holding the rod spline with angle-nose pliers.
MASTER CYLINDER
M1351004200375
DISASSEMBLY AND ASSEMBLY
AC210714 AB
MB991568
ANGLE-NOSE PLIERS
ROD SPLINE
15DB194A
3
5
6
4
N
N
N
6
5
MASTER CYLINDER KIT
BRAKE FLUID: DOT 3 OR DOT 4
4
1
5
4
2
N
DISASSEMBLY STEPS
1. BRAKE MASTER CYLINDER TO
FLUID RESERVOIR SEAL
2. BRAKE MASTER CYLINDER PIN
<VEHICLES WITH ABS>
<<A>>
3. BRAKE MASTER CYLINDER UNION
RETAINER
4. PRIMARY PISTON ASSEMBLY
5. SECONDARY PISTON ASSEMBLY
6. MASTER CYLINDER BODY
DISASSEMBLY STEPS
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-29
DISASSEMBLY SERVICE POINT
.
<<A>> BRAKE MASTER CYLINDER UNION
RETAINER DISASSEMBLY
Remove the brake master cylinder union retainer while
depressing the piston.
INSPECTION
M1351004300297
• Check the inner surface of master cylinder body for rust or
pitting.
• Check the primary and secondary pistons for rust, scoring,
wear or damage.
AC000903
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