2009 INFINITI QX56 Factory Service Manual

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Page 457 of 4171

INFINITI QX56 2009 Factory Service Manual BRAKE BOOSTERBR-27
< ON-VEHICLE REPAIR >
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1. Using a hand vacuum pump, apply a vacuum of – 66.7 kPa (– 500 mmHg, –19.69 inHg) to brake booster.
2. Check output rod

Page 458 of 4171

INFINITI QX56 2009 Factory Service Manual BR-28
< ON-VEHICLE REPAIR >
VACUUM LINES
VACUUM LINES
Removal and InstallationINFOID:0000000003772441
REMOVAL
1. Remove engine room cover.
2. Disconnect vacuum hose from hose clip.
3. Release clamps a

Page 459 of 4171

INFINITI QX56 2009 Factory Service Manual FRONT DISC BRAKEBR-29
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FRONT DISC BRAKE
Exploded View of Brake PadsINFOID:0000000005856027
Removal and Installation of Brake PadsINFOID:00000000058

Page 460 of 4171

INFINITI QX56 2009 Factory Service Manual BR-30
< ON-VEHICLE REPAIR >
FRONT DISC BRAKE
4. Hang cylinder body with a wire, and remove pads, pad retainers,shims, and shim covers from torque member.
CAUTION:
When removing the pad retainer from

BR-30
< ON-VEHICLE REPAIR >
FRONT DISC BRAKE
4. Hang cylinder body with a wire, and remove pads, pad retainers,shims, and shim covers from torque member.
CAUTION:
When removing the pad retainer from the torque member,
lift it in the direction indi cated by the arrow as shown so
that it does not deform.
INSTALLATION
1. Push piston in using suitable tool.
CAUTION:
In the case of replacing a pad with new one, ch eck the brake fluid level in the reservoir tank
because brake fluid returns to reservoir tank when pressing piston in.
NOTE:
Use a suitable tool to easily press piston.
2. Apply Molykote AS-880N grease or equivalent to between shim cover and shim. Install inner shim, inner shim cover to inner pad, and install outer shim, outer shim cover to outer pad.
3. Install pad retainers and pads to torque member. CAUTION:
• Securely assemble pad retainers so that they ar e not being lifted up from torque member.
• Both inner and outer pads have a pad return system on the pad retainer. Install pad return lever
securely to pad wear sensor.
4. Install cylinder body to torque member.
5. Install sliding pin bolts, and tighten it to the specified torque. Refer to BR-29, "
Removal and Installation of
Brake Pads".
6. Check front disc brake for drag and correct as necessary.
7. Install front wheel and tires. Refer to WT-41, "
Adjustment".
8. Check brake fluid level. Refer to BR-17, "
On Board Inspection".
Brake Burnishing ProcedureINFOID:0000000005856029
Burnish contact surfaces between disc rotors and pads according to following procedure after refinishing or
replacing rotors, after replacing pads, or if a soft pedal occurs at very low mileage.
CAUTION:
• Be careful of vehicle speed because the brake does not operate easily until pad and disc rotor are securely seated.
• Only perform this procedure under safe road and traffic conditions. Use extreme caution.
1. Drive vehicle on straight, flat road.
2. Depress brake pedal with the power to stop vehicle within 3 to 5 seconds until the vehicle stops.
3. Drive without depressing brake for a few minutes to cool the brake.
4. Repeat steps 1 through 3 until pad and disc rotor are securely seated.
SBR556E
Revision: December 20092009 QX56

Page 461 of 4171

INFINITI QX56 2009 Factory Service Manual FRONT DISC BRAKEBR-31
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Exploded View of Brake CaliperINFOID:0000000005856030
Removal and Installation of Brake Caliper and RotorINFOID:00000000058

Page 462 of 4171

INFINITI QX56 2009 Factory Service Manual BR-32
< ON-VEHICLE REPAIR >
FRONT DISC BRAKE
NOTE:
Discard the copper washers, do not reuse.
5. Remove torque member bolts, and remove brake caliper assembly.
CAUTION:
Do not drop brake pad.
6. Apply

Page 463 of 4171

INFINITI QX56 2009 Factory Service Manual FRONT DISC BRAKEBR-33
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3. Install brake hose to brake caliper assembly using new copper washers. Align the brake hose to the projection as shown an

Page 464 of 4171

INFINITI QX56 2009 Factory Service Manual BR-34
< ON-VEHICLE REPAIR >
REAR DISC BRAKE
REAR DISC BRAKE
Exploded View of Brake PadsINFOID:0000000004057217
Removal and Installation of Brake PadINFOID:0000000004057218
WARNING:
Clean dust on calip

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