Nissan Murano. Manual — part 205
BR-30
< REMOVAL AND INSTALLATION >
BRAKE BOOSTER
BRAKE BOOSTER
Exploded View
INFOID:0000000009722328
Removal and installation
INFOID:0000000009722329
REMOVAL
1.
Remove brake master cylinder assembly. Refer to
.
CAUTION:
• Depress the brake pedal several times to release the vacuum pressure from the brake booster.
Then remove the master cylinder assembly.
• Never depress the brake pedal after the master cylinder assembly is removed.
• The piston of the master cylinder assembly is exposed. Never damage it when removing the
master cylinder.
• The piston may drop off when pulled out strongly. Never hold the piston. Hold the cylinder body
when handling the master cylinder assembly.
2.
Remove vacuum hose from brake booster. Refer to
.
3.
Remove snap pin (1) and clevis pin (2) from inside vehicle.
4.
Remove nuts on brake booster and brake pedal assembly.
CAUTION:
Hold the brake booster so as to avoid dropping out.
5.
Remove brake booster from dash panel in engine room side.
CAUTION:
Never deform or bend the brake tubes.
INSTALLATION
Note the following, and installation is the reverse order of removal.
• Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installation, 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.
1.
Master cylinder assembly
2.
Brake booster
3.
Lock nut
4.
Clevis
5.
Gasket
Refer to
for symbols in the figure.
JPFIA0425GB
JPFIA0019ZZ
BRAKE BOOSTER
BR-31
< REMOVAL AND INSTALLATION >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
• Replace the clevis pin if it is damaged. Refer to
BR-21, "Inspection and Adjustment"
• After installation, perform the air bleeding. Refer to
BR-13, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
Inspection and Adjustment
INFOID:0000000009722330
INSPECTION AFTER REMOVAL
Air Tight
CAUTION:
Check the air tight condition when the master cylinder and the brake booster is installed.
1.
With a handy vacuum pump, apply vacuum pressure of –66.7 kPa (–500 mmHg, –19.70 inHg) to the
brake booster.
2.
If the air tight condition cannot be maintained, perform the following operation.
a.
Check the no dirt and dust are present on the brake booster and brake master cylinder mating faces.
Clean it if necessary.
b.
Check O-ring on the master cylinder. If anything is found, replace the O-ring.
c.
Check the air tight condition again. If the condition still cannot be maintained, replace the brake booster.
Input Rod Length Inspection
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
Standard
B
: Refer to
.
JPFIA0020ZZ
BRA0037D
BR-32
< REMOVAL AND INSTALLATION >
BRAKE BOOSTER
• 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 INSTALLATION
Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to
.
JPFIA0043ZZ
JPFIA0044ZZ
VACUUM LINES
BR-33
< REMOVAL AND INSTALLATION >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
VACUUM LINES
Exploded View
INFOID:0000000009722331
Removal and Installation
INFOID:0000000009722332
REMOVAL
Remove the vacuum hose and tube.
INSTALLATION
Note the following, install the vacuum hose and tube.
• Because vacuum hose contains a check valve, it must be installed in the correct position. Refer to the stamp
to confirm correct installation. Brake booster will not operate normally if the hose is installed in the wrong
direction.
• When installing vacuum hose, insert it until its tip reaches the
back-end of length (A) or further as shown in the figure.
- Face the marking side up when assembling of vacuum hose.
(Brake booster and intake manifold side)
- Face the marking side vehicle front when assembling of vacuum
hose. (Vacuum tube side)
CAUTION:
Never use lubricating oil during assembly.
Inspection
INFOID:0000000009722333
INSPECTION AFTER REMOVAL
Appearance
Check for correct assembly, damage and deterioration.
Check Valve Airtightness
1.
Clamp
2.
Vacuum hose (built in check valve)
3.
Vacuum tube
4.
Vacuum hose
A.
To intake manifold
B.
Paint mark
C.
Stamp indicating engine direction
D.
To brake booster
JPFIA0306ZZ
Standard
A
: 24 mm (0.95 in) or more
JPFIA0023ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст