Nissan Altima L32. Manual - part 146

BR-22

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BRAKE MASTER CYLINDER

BRAKE MASTER CYLINDER

Exploded View

INFOID:0000000004204179

Removal and Installation

INFOID:0000000004204180

CAUTION:

• Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is

splashed on painted areas, wash it away with water immediately.

• Never scratch the piston of master cylinder when installing/removing because the piston is exposed.

Check for any dust on the piston, and wash with brake fluid if needed.

• Hold the master cylinder body when handing the master cylinder assembly. Never hold the piston

because the piston might become detached if pulled strongly.

• Refill the reservoir tank with new brake fluid “DOT 3”.

• Never reuse drained brake fluid.

REMOVAL 

1. Drain the brake fluid. Refer to 

BR-15, "Drain and Refill"

.

2. Disconnect the brake fluid level switch harness connector.
3. Disconnect the clutch fluid hose (if equipped).
4. Disconnect the master cylinder brake tubes using a suitable tool.

5. Remove the master cylinder nuts and remove the master cylinder assembly.

1.

Reservoir cap

2.

Oil strainer (blue)

3.

Reservoir tank

4.

Grommet

5.

Pin

6.

Master cylinder

7.

O-ring

8.

Brake fluid level switch connector

A.

To clutch (if equipped)

B.

Brake fluid

C.

PBC (Poly Butyl Cuprysil) grease or 
silicone-based grease

AWFIA0506GB

SBR686C

BRAKE MASTER CYLINDER

BR-23

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INSTALLATION

Installation is in the reverse order of removal.

• Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease

to brake booster at (A) position as shown, before installing the

master cylinder to the brake booster.

• Tighten brake tube flare nut to the specified torque using a suitable tool. Refer to 

BR-11, "Hydraulic Circuit"

.

• Refill with new brake fluid and bleed air. Refer to 

BR-16, "Bleeding Brake System"

.

SFIA2847J

BR-24

< ON-VEHICLE REPAIR >

BRAKE BOOSTER

BRAKE BOOSTER

Exploded View

INFOID:0000000004204181

Removal and installation

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CAUTION:

• Be careful not to deform or bend brake tube while removing and installing brake booster.

• Replace clevis pin if it is damaged.

• 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.

REMOVAL

1. Remove the air cleaner assembly. Refer to 

EM-25, "Removal and Installation"

 (QR25DE), 

EM-129,

"Removal and Installation"

 (VQ35DE).

2. Disconnect the clutch hose from the reservoir tank (if equipped).
3. Remove the brake master cylinder. Refer to 

BR-22, "Removal and Installation"

. 

4. Release the fuel pressure and disconnect the fuel lines at the main connection. Refer to 

EC-550, "Inspec-

tion"

 (QR25DE for California), 

EC-1038, "Inspection"

 (QR25DE except California), 

EC-1579, "Inspection"

(VQ35DE).

5. Remove the cowl top and cowl top extension. Refer to 

EXT-18, "Removal and Installation"

.

6. Remove the vacuum hose from the brake booster. Refer to 

BR-24, "Exploded View"

. 

7. Remove the accelerator pedal. Refer to 

ACC-3, "Removal and Installation"

.

8. Remove the brake pedal. Refer to 

BR-17, "Removal and Installation"

.

9. Remove the snap pin and clevis pin from inside the vehicle.
10. Remove brake booster from the dash panel on the engine room

side.

1.

Reservoir tank

2.

Master cylinder

3.

Brake booster

4.

Brake pedal

5.

Gasket

A. Lock nut

AWFIA0507GB

SFIA2044E

BRAKE BOOSTER

BR-25

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INSTALLATION

1. Loosen lock nut to adjust input rod length so that length (B) is at

the specified value.

2. After adjusting (B), temporarily tighten lock nut to install booster

assembly. Make sure that a gasket is installed between the

brake booster and dash panel.

CAUTION:

Always install a gasket between the brake booster and dash

panel.

3. Install the brake pedal. Refer to 

BR-17, "Removal and Installa-

tion"

.

4. Install the accelerator pedal. Refer to 

ACC-3, "Removal and Installation"

.

5. Install the vacuum hose on the brake booster. Refer to 

BR-24, "Exploded View"

.

6. Install the cowl top and cowl top extension. Refer to 

EXT-18, "Removal and Installation"

.

7. Connect the fuel lines.
8. Install the master cylinder. Refer to 

BR-22, "Removal and Installation"

. 

9. Connect the clutch hose to the reservoir tank (if equipped).
10. Install the air cleaner assembly. Refer to 

EM-25, "Removal and Installation"

 (QR25DE), 

EM-129,

"Removal and Installation"

 (VQ35DE).

11. Adjust the brake pedal height. Refer to 

BR-13, "Inspection and Adjustment"

. 

12. Tighten lock nut of input rod to the specified torque. Refer to 

BR-24, "Exploded View"

.

13. Refill new brake fluid and bleed air. Refer to 

BR-16, "Bleeding Brake System"

. 

Length (B)

: Refer to 

BR-47, "Brake Booster"

.

SGIA0060E