Infiniti G37 Coupe. Manual — part 250
BR-38
< ON-VEHICLE REPAIR >
VACUUM LINES
• Use a handy vacuum pump (A) to check.
• Replace vacuum hose assembly if vacuum hose and check valve
are malfunctioning.
When connected to the booster side (B):
Vacuum should decrease within 1.3 kPa (9.8 mm-
Hg, 0.38 inHg) for 15 seconds under a vacuum of
−
66.7 kPa (
−
500 mmHg,
−
19.69 inHg).
When connected to the engine side (C):
Vacuum should not exist.
JPFIA0024ZZ
FRONT DISC BRAKE
BR-39
< ON-VEHICLE REPAIR >
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FRONT DISC BRAKE
BRAKE PAD (1 PISTON TYPE)
BRAKE PAD (1 PISTON TYPE) : Exploded View
INFOID:0000000001664763
BRAKE PAD (1 PISTON TYPE) : Removal and Installation
INFOID:0000000001647865
REMOVAL
WARNING:
Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.
CAUTION:
• Never depress the brake pedal while removing the brake pads because the piston may pop out.
• Never spill or splash brake fluid on the disc rotor.
1.
Remove tires with power tool.
2.
Remove the protector and location pin.
3.
Suspend the cylinder body with suitable wire so that the brake hose will not stretch. Remove the pad
return spring and remove the brake pads from the torque member.
CAUTION:
• Never deform the pad return spring when removing the pad return spring.
• Never deform the pad retainers when removing the pad retainers from the torque member.
• Never damage the piston boot.
• Never remove the shims from the brake pads.
• Never drop the brake pads.
1.
Bleeder valve
2.
Cap
3.
Brake hose
4.
Union bolt
5.
Copper washer
6.
Protector
7.
Bushing
8.
Location pin
9.
Sliding pin
10. Sliding pin boot
11.
Cylinder body
12. Piston seal
13. Piston
14. Piston boot
15. Torque member
16. Inner pad
17. Pad wear sensor
18. Pad retainer
19. Pad return spring
20. Outer pad
1: Apply rubber grease.
2: Apply bentonite noise damping brake grease.
: Apply brake fluid.
Refer to
for symbols not described on the above.
JPFIA0025GB
BR-40
< ON-VEHICLE REPAIR >
FRONT DISC BRAKE
INSTALLATION
WARNING:
Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.
CAUTION:
• Never depress the brake pedal while removing the brake pads because the piston may pop out.
• Never spill or splash brake fluid on the disc rotor.
1.
Apply bentonite noise damping brake grease to the pad retainers before it to installing the torque member
if the pad retainers has been removed.
CAUTION:
• Securely assemble the pad retainers so that it will not be lifted up from the torque member.
• Never deform the pad retainers.
2.
Install the brake pads to the torque member.
CAUTION:
The brake pads is directional. Never mistake the direction.
(See the figure)
3.
Install the pad return spring (1) to the brake pad (2).
CAUTION:
Correctly insert the pad return spring into the pad return
spring hole on the brake pad.
4.
Install cylinder body to torque member.
CAUTION:
• Never damage the piston boot.
• In the case of replacing a pad with new one, check a brake
fluid level in the reservoir tank because brake fluid
returns to master cylinder reservoir tank when pressing
piston in.
NOTE:
Use a disc brake piston tool to easily press piston.
5.
Install the location pin and tighten it to the specified torque.
6.
Install the protector.
7.
Depress the brake pedal several times to check that no drag feel is present for the front disc brake.
8.
Install tires.
BRAKE PAD (1 PISTON TYPE) : Inspection and Adjustment
INFOID:0000000001647866
INSPECTION AFTER REMOVAL
Eliminate rust on the pad retainers and the torque member. Replace them if rust is excessively attached.
ADJUSTMENT AFTER INSTALLATION
Brake Burnishing Procedure
Burnish contact surfaces between pads according to following procedure after refinishing or 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 pads and disc rotor are
securely fitted.
• 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.
: Direction of disc rotor rotation (Forward direction)
JPFIA0029ZZ
JPFIA0028ZZ
FRONT DISC BRAKE
BR-41
< ON-VEHICLE REPAIR >
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3.
Drive without depressing brake for a few minutes to cool the brake.
4.
Repeat steps 1 to 3 until pad and disc rotor are securely fitted.
BRAKE PAD (4 PISTON TYPE)
BRAKE PAD (4 PISTON TYPE) : Exploded View
INFOID:0000000001647956
BRAKE PAD (4 PISTON TYPE) : Removal and Installation
INFOID:0000000001647868
REMOVAL
WARNING:
Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.
CAUTION:
• Never depress the brake pedal while removing the brake pads because the piston may pop out.
• Never spill or splash brake fluid on the disc rotor.
1.
Remove tires with power tool.
1.
Piston
2.
Piston seal
3.
Piston boot
4.
Retaining ring
5.
Cap
6.
Bleeder valve
7.
Cap
8.
Clip
9.
Pad pin
10.
Caliper
11.
Inner shim
12.
Inner pad
13.
Pad wear sensor (RH inner pad
only)
14.
Cross spring
15.
Outer pad
16.
Outer shim
1: Apply rubber grease.
2: Apply copper based brake grease.
: Apply brake fluid.
Refer to
for symbols not described on the above.
JPFIA0212GB
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