Nissan Sentra. Manual - part 148

BR-34

< REMOVAL AND INSTALLATION >

BRAKE BOOSTER

BRAKE BOOSTER

Exploded View

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Removal and installation

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REMOVAL

1. Remove cowl top and cowl top extension. Refer to 

EXT-26, "Removal and Installation"

.

2. Remove air duct and air cleaner case. Refer to 

EM-25, "Removal and Installation"

.

3. Remove brake master cylinder assembly. Refer to 

BR-32, "Removal and Installation"

.

4. Remove vacuum hose from brake booster. Refer to 

BR-36, "Removal and Installation"

.

5. Remove the instrument lower panel LH. Refer to 

IP-21, "Removal and Installation"

.

6. Remove snap pin (1) and clevis pin (2). Refer to 

BR-22,

"Exploded View"

.

7. Remove nuts on brake booster and brake pedal assembly.

CAUTION:

Secure the brake booster to avoid damage to components.

8. Remove brake booster and spacer.

CAUTION:

Do not deform or bend brake pipes.

NOTE:

If removing brake booster is difficult, remove clevis from brake booster.

9. Remove vacuum pipe from brake booster. 
10. Remove spacer from brake booster.

1.

Master cylinder assembly

2.

Brake booster

3.

Lock nut

4.

Clevis

5.

Gasket

6.

Spacer

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BRAKE BOOSTER

BR-35

< REMOVAL AND INSTALLATION >

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INSTALLATION

Installation is in 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.

• Do not deform or bend the brake tubes when installing the brake booster.

• Always use a gasket between the brake booster and the spacer.

• Do not reuse the clevis pin.

• Loosen the lock nut (1) and adjust the input rod (2) to the specified

length (A). Tighten the lock nut to the specified torque.

• Perform the air bleeding. Refer to 

BR-17, "Bleeding Brake Sys-

tem"

.

• Check each item of brake pedal. Adjust it if the measurement value

is not the standard. Refer to 

BR-11, "Inspection"

.

Length (A)

: Refer to 

BR-55, "Brake Booster"

.

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BR-36

< REMOVAL AND INSTALLATION >

VACUUM LINES

VACUUM LINES

Exploded View

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Removal and Installation

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REMOVAL

1. Remove air duct and air cleaner case. Refer to 

EM-25, "Removal and Installation"

.

2. Remove the vacuum hoses and vacuum piping.

INSPECTION AFTER REMOVAL

Visual Inspection

Check for correct installation, damage and deterioration of the vacuum hoses and pipe.

Valve Air-tightness Check

• Connect a suitable tool at each end of the vacuum hose with built-in check valve to inspect the check valve

operation.

• Replace the vacuum hose with built-in check valve if out of specification.

INSTALLATION

Installation is in the reverse order of removal.

1.

Clamp

2.

Vacuum hose (built-in check valve)

3.

Vacuum piping

4.

Vacuum hose

A.

To intake manifold side

B.

Paint mark

C.

Stamp indicating engine direction

D.

To brake booster

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Vacuum applied at booster end

: Refer to 

BR-54, "Check Valve"

.

Vacuum applied at intake manifold end

: Refer to 

BR-54, "Check Valve"

.

VACUUM LINES

BR-37

< REMOVAL AND INSTALLATION >

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• When installing vacuum hose, insert it until its tip reaches the

back-end of length (A) or further as shown.

CAUTION:

Do not use lubricating oil during assembly.

- Face the paint mark of vacuum hose (build-in check valve) (intake

manifold side) to vehicle right side to assemble.

- Face the paint mark of vacuum hose (build-in check valve) (brake

booster side) to vehicle front side to assemble.

- Face the paint mark of vacuum piping (intake manifold side) to

vehicle front side to assemble.

- Face the paint mark of vacuum piping (brake booster side) to downward to assemble.

- Face the paint mark of vacuum hose (intake manifold side) to downward to assemble.

- Face the paint mark of vacuum hose (brake booster side) to vehicle front side to assemble.

- For clamp mounting direction (the orientation of pawl), refer to 

BR-36, "Exploded View"

.

Length (A)

: 24 mm (0.95 in) or more

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