Nissan Qashqai J11. Manual — part 889
BR-28
< REMOVAL AND INSTALLATION >
[LHD]
BRAKE MASTER CYLINDER
3.
Fix the cylinder body to a vise.
CAUTION:
• Place the reservoir tank with the chamfered pin hole (
)
facing up.
• Always set copper plates or cloth between vise when fix-
ing the cylinder body to a vise. Never overtighten the vise.
4.
Tilt the reservoir tank so that a mounting pin can be inserted.
Insert a mounting pin. Return the reservoir tank to the horizontal
position. Insert another mounting pin into the pin hole on the
opposite side in the same manner after the mounting pin passes
through the cylinder body pin hole.
CAUTION:
Never reuse the mounting pin.
Inspection
INFOID:0000000010305371
INSPECTION AFTER INSTALLATION
Fluid Leak
Check for brake fluid leakage from the cylinder body-to-brake booster mounting face, reservoir tank mounting
face and brake tube connections.
JPFIA0016ZZ
JPFIA0015ZZ
BRAKE BOOSTER
BR-29
< REMOVAL AND INSTALLATION >
[LHD]
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
BRAKE BOOSTER
Exploded View
INFOID:0000000010305372
HRA2DDT - MR20DD
K9K - R9M
Removal and installation
INFOID:0000000010305373
REMOVAL
1.
Remove battery and bracket.
2.
Remove the cowl top. Refer to
EXT-29, "Removal and Installation"
.
3.
Remove the instrument lower panel LH. Refer to
IP-13, "Removal and Installation"
.
E1FIA0152GB
1.
Master cylinder assembly
2.
Brake booster
3.
Lock nut
4.
Gasket
5.
Spacer
Refer to
E1FIA0153GB
1.
Master cylinder assembly
2.
Brake booster
3.
Lock nut
4.
Gasket
5.
Spacer
Refer to
BR-30
< REMOVAL AND INSTALLATION >
[LHD]
BRAKE BOOSTER
4.
Remove snap pin (1) and clevis pin (2) from inside vehicle.
5.
Disconnect vacuum hose from brake booster. Refer to
6.
Remove master cylinder assembly. Refer to
BR-26, "Removal and Installation"
7.
Disconnect the harness connector from the brake booster pressure sensor.
8.
Remove the brake booster pressure sensor.
9.
Remove the nuts on the brake booster and brake pedal.
CAUTION:
Secure the brake booster to avoid damage to components.
10. Remove the brake booster.
CAUTION:
Never deform or bend the brake pipes.
INSTALLATION
Note the following, and installation is the reverse order of removal.
CAUTION:
• Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installa-
tion, the dash panel may damage the threads.
• Never deform or bend the brake tubes when installing the brake booster.
• Always use a new gasket between the brake booster and the spacer.
• Replace the clevis pin if it is damaged. Refer to
BR-18, "Inspection and Adjustment"
• After installation, perform the air bleeding. Refer to
BR-12, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
Inspection and Adjustment
INFOID:0000000010305374
INSPECTION AFTER REMOVAL
Output Rod Length Inspection
1.
With a handy vacuum pump, apply vacuum pressure of
−
66.7
kPa (
−
500 mmHg,
−
19.70 inHg,
−
0.667 bar) to the brake
booster.
2.
Check the output rod length (A).
Input Rod Length Inspection
JPFIA0019ZZ
Standard
Output rod length (A)
: Refer to
.
JPFIA0021ZZ
BRAKE BOOSTER
BR-31
< REMOVAL AND INSTALLATION >
[LHD]
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
1.
Loosen the lock nut (1) and adjust the input rod (2) to the speci-
fied length (B).
2.
Tighten the lock nut to the specified torque.
INSPECTION AFTER INSTALLATION
Operation
Depress the brake pedal several times at 5-second intervals with the
engine stopped. Start the engine with the brake pedal fully
depressed. Check that the clearance between brake pedal and dash
lower pane decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due to
the brake system operation.
Air Tight
• Idle the engine for 1 minute to apply vacuum to the brake booster,
and stop the engine. Then depress the brake pedal several times
at 5-second intervals until the accumulated vacuum is released to
atmospheric pressure. Check that the clearance between brake
pedal and dash lower panel gradually increases (A
→
B
→
C) each
time the brake pedal is depressed during this operation.
• Depress the brake pedal with the engine running. Then stop the
engine while holding down the brake pedal. Check that the brake
pedal stroke does not change after holding down the brake pedal
for 30 seconds or more.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due
to the brake system operation.
ADJUSTMENT AFTER INSTALLTION
Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to
.
Standard
Input rod length (B)
: Refer to
.
JPFIA0020ZZ
BRA0037D
JPFIA0043ZZ
JPFIA0044ZZ
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