Mitsubishi Grandis. Manual — part 893
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-14
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
REMOVAL AND INSTALLATION
M1351003700548
<LH drive vehicles>
Pre-removal Operation
• Air Cleaner Resonator, Air Cleaner Cover, Air Cleaner
Intake Duct, Air Cleaner Body Assembly Removal (Refer
to GROUP 15, Air Cleaner
.) <LH drive vehicles>
• Engine Cover and Engine Cover Bracket Removal (Refer
to GROUP 11A, Camshaft and Valve Stem Seal
.) <LH drive vehicles>
• Air Intake Hose Removal (Refer to GROUP 15, Air
Cleaner
.) <LH drive vehicles>
• Canister removal (Refer to GROUP 17, Evaporative
Emission Control System
− Canister
.) <LH drive
vehicles>
• Brake Fluid Draining
Post-installation Operation
• Brake Fluid Supplying and Air Bleeding (Refer to
.)
• Canister Installation (Refer to GROUP 17, Evaporative
Emission Control System
− Canister
.) <LH drive
vehicles>
• Brake Pedal Adjustment (Refer to
• Air Intake Hose Installation (Refer to GROUP 15, Air
Cleaner
.) <LH drive vehicles>
• Engine Cover and Engine Cover Bracket Installation
(Refer to GROUP 11A, Camshaft and Valve Stem Seal
.) <LH drive vehicles>
• Air Cleaner Resonator, Air Cleaner Cover, Air Cleaner
Intake Duct, Air Cleaner Body Assembly Installation
(Refer to GROUP 15, Air Cleaner
vehicles>
AC312193
AB
1
10
12
14
13
15 ± 2 N·m
14 ± 3 N·m
6
11
15
N
8
14.7 ± 2.9 N·m
2
7
5
3
4
13 ± 2 N·m
9
7
Master cylinder removal steps
1.
Brake fluid level switch connector
2.
Hose clip
>>C<<
3.
Reservoir hose
4.
Reservoir assembly
5.
Reservoir cap
6.
Brake fluid level switch
7.
Brake pipe connection
•
Brake pipe [between brake master
cylinder and hydraulic unit
(ABS-ECU)] (Refer to GROUP 35B,
Hydraulic Unit
Master cylinder removal steps
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-15
<RH drive vehicles>
•
Clip (LH side only) (Refer to
8.
Clutch damper bracket
9.
Brake master cylinder
>>B<<
•
Push rod protrusion amount check
and adjustment
Brake booster removal steps
>>A<<
10. Vacuum hose (with built-in check
valve)
11. Snap pin
12. Pin
13. Brake booster mounting nut
14. Brake booster assembly
15. Sealer
Master cylinder removal steps
AC303153 AC
1
8
10
12
14
13
15 ± 2 N·m
14 ± 3 N·m
6
11
15
N
8
14 ± 3 N·m
2
7
5
5 ± 1 N·m
3
4
13 ± 2 N·m
9
Master cylinder removal steps
1.
Heat protector
2.
Brake fluid level switch connector
3.
Hose clip
>>C<<
4.
Reservoir hose
5.
Reservoir assembly
6.
Reservoir cap
7.
Brake fluid level switch
8.
Brake pipe connection
9.
Brake master cylinder
>>B<<
•
Push rod protrusion amount check
and adjustment
Brake booster removal steps
>>A<<
10. Vacuum hose (with built-in check
valve)
•
Inlet manifold (Refer to GROUP 15,
Inlet manifold
11. Snap pin
12. Pin
13. Brake booster mounting nut
14. Brake booster assembly
15. Sealer
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-16
INSTALLATION SERVICE POINTS
>>A<< VACUUM HOSE CONNECTION
<LH drive vehicles>
1. Insert the vacuum hose into the vacuum pipe with
its white marking facing upward.
2. Insert the vacuum hose into the brake booster
with its brown marking facing forward.
<RH drive vehicles>
1. Insert the vacuum hose into the inlet manifold
with its white marking facing vehicle right side.
2. Insert the vacuum hose into the brake booster
with its blue marking facing forward.
>>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 to the
brake booster.
Standard value (A): 11.3
− 11.7 mm
NOTE: When a negative pressure of 66.7 kPa is
not applied to the brake booster, the push rod
protrusion amount (A) should be 10.3 - 10.7 mm.
AC311395
Marking
AB
Vacuum hose assembly
Marking
Vacuum pipe
AC301646
AC301647
AC302065 AC
Marking
Inlet manifold
Marking
Vacuum
hose
Vacuum hose assembly
AC102457BD
A
Measuring distance A
Block gauge
AC200306AC
MB991568
Angle-nose pliers
Rod spline
MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER
BASIC BRAKE SYSTEM
35A-17
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 push rod adjusting
socket (MB991568) to turn the push rod while
holding the rod spline with angle-nose pliers.
>>C<< RESERVOIR HOSE CONNECTION
1. Insert the reservoir hose into the reservoir
assembly with its paint mark facing upward.
2. Insert the reservoir hose into the master cylinder
with its paint mark facing upward.
MASTER CYLINDER
M1351004200450
DISASSEMBLY AND REASSEMBLY
AC311389 AB
Master
cylinder
Reservoir
assembly
<LH drive vehicles>
AC301992
AD
Master
cylinder
Reservoir
assembly
<RH drive vehicles>
AC303562
1
3
4
N
9
AC
5
N
6
N
7
N
N
2
8
10
5
6
7
8
9
Master cylinder kit
2.45 ± 0.5 N·m
(Apply fluid to cylinder
inner)
Disassembly steps
1. Inner bolt
2. Reservoir union
3. Reservoir seal
4. Stop pin
5. Rod seal
<<A>>
6. Circlip
7. Piston guide assembly
8. Primary piston assembly
9. Secondary piston assembly
10. Master cylinder body
Disassembly steps (Continued)
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