Infiniti G37 Coupe. Manual — part 244
BR-14
< ON-VEHICLE MAINTENANCE >
BRAKE BOOSTER
BRAKE BOOSTER
Inspection
INFOID:0000000001647829
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 panel 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
• Run the engine at idle for 1 minute to apply vacuum to the brake
booster, and stop the engine. Then depress the brake pedal sev-
eral 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 when perform-
ing 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.
BRA0037D
JPFIA0043ZZ
JPFIA0044ZZ
FRONT DISC BRAKE
BR-15
< ON-VEHICLE MAINTENANCE >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
FRONT DISC BRAKE
BRAKE PAD
BRAKE PAD : Inspection
INFOID:0000000001647831
PAD WEAR
1 Piston Type
Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.
4 Piston Type
Check pad thickness from an inspection hole on caliper. Check using
a scale if necessary.
DISC ROTOR
DISC ROTOR : Inspection
INFOID:0000000001647832
APPEARANCE
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace if there are.
RUNOUT
1.
Fix the disc rotor to the wheel hub and bearing assembly with
wheel nuts (2 points at least).
2.
Inspect the runout with a dial gauge. [Measured at 10 mm (0.39
in) inside the disc edge.]
NOTE:
Check the wheel bearing axial end play before the inspection.
Refer to
.
3.
Find the installation position that has a minimum runout by shifting the disc rotor-to-wheel hub and bearing
assembly installation position by one hole at a time if the runout exceeds the limit value.
4.
Replace or lathe the disc rotor if the runout is outside the limit even after performing the above operation.
[When lathing, use the Pro-Cut PEM On-Car brake Lathe (Tool No. 38-PFM90.5) or equivalent.]
THICKNESS
Standard
Standard thickness
: Refer to
Limit
Wear limit thickness
: Refer to
MAA0439D
Standard
Standard thickness
: Refer to
Limit
Wear limit thickness
: Refer to
PFIA0228J
Limit
Runout limit
: Refer to
BRA0580D
BR-16
< ON-VEHICLE MAINTENANCE >
FRONT DISC BRAKE
Check the thickness of the disc rotor using a micrometer. Replace
the disc rotor if the thickness is below the wear limit.
Limit
Wear limit thickness
: Refer to
SBR020B
REAR DISC BRAKE
BR-17
< ON-VEHICLE MAINTENANCE >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
REAR DISC BRAKE
BRAKE PAD
BRAKE PAD : Inspection
INFOID:0000000001647834
PAD WEAR
1 Piston Type
Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.
2 Piston Type
Check pad thickness from an inspection hole on caliper. Check using
a scale if necessary.
DISC ROTOR
DISC ROTOR : Inspection
INFOID:0000000001647835
APPEARANCE
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace if there are.
RUNOUT
1.
Fix the disc rotor to the wheel hub and bearing assembly with
wheel nuts (2 points at least).
2.
Inspect the runout with a dial gauge. [Measured at 10 mm (0.39
in) inside disc edge.]
NOTE:
Check the wheel bearing axial end play before the inspection.
Refer to
3.
Find the installation position that has a minimum runout by shifting the disc rotor-to-wheel hub and bearing
assembly installation position by one hole at a time if the runout exceeds the limit value.
4.
Replace or lathe the disc rotor if the runout is outside the limit even after performing the above operation.
[When lathing, use the Pro-Cut PEM On-Car brake Lathe (Tool No. 38-PFM90.5) or equivalent.]
THICKNESS
Standard
Standard thickness
: Refer to
Limit
Wear limit thickness
: Refer to
BRA0010D
Standard
Standard thickness
: Refer to
Limit
Wear limit thickness
: Refer to
PFIA0227J
Limit
Runout limit
: Refer to
BRA0697D
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