Infiniti FX35, FX50 (S51). Manual — part 229
BRAKE BOOSTER
BR-13
< PERIODIC MAINTENANCE >
C
D
E
G
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K
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A
B
BR
N
O
P
BRAKE BOOSTER
Inspection
INFOID:0000000005234169
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
• Idle the engine for 1 minute to apply vacuum to the brake booster,
and stop the engine. Then depress the brake pedal several 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 during 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
BR-14
< PERIODIC MAINTENANCE >
FRONT DISC BRAKE
FRONT DISC BRAKE
BRAKE PAD
BRAKE PAD : Inspection and Adjustment
INFOID:0000000005234170
INSPECTION
2 Piston Type
Check brake pad wear thickness from an inspection hole on cylinder
body. Check using a scale if necessary.
4 Piston Type
Check brake pad wear thickness from an inspection hole on caliper.
Check using a scale if necessary.
ADJUSTMENT
CAUTION:
• Burnish contact surfaces between pads according to the following procedure after refinishing or
replacing pads, or if a soft pedal occurs at very low mileage.
• Be careful of vehicle speed because the brake does not operate firmly/securely 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.
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.
DISC ROTOR
DISC ROTOR : Inspection and Adjustment
INFOID:0000000005234171
INSPECTION
Appearance
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace it if necessary.
Runout
Limit
Wear thickness
: Refer to
.
MAA0439D
Limit
Wear thickness
: Refer to
.
PFIA0228J
FRONT DISC BRAKE
BR-15
< PERIODIC MAINTENANCE >
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1.
Fix the disc rotor to the wheel hub and bearing assembly with
wheel nuts (2 points at least).
2.
Check the wheel bearing axial end play before the inspection.
Refer to
(AWD).
3.
Inspect the runout with a dial indicator to measure at 10 mm
(0.39 in) inside the disc edge.
4.
Find the installation position that has a minimum runout by shift-
ing the disc rotor-to-wheel hub and bearing assembly installation position by one hole at a time if the
runout exceeds the limit value.
5.
Refinish the disc rotor if the runout is outside the limit even after performing the above operation. [When
refinishing, use the Pro-Cut PEM On-Car brake Lathe (Tool No. 38-PFM90.5) or equivalent.]
CAUTION:
• Check in advance that the thickness of the disc rotor is wear thickness + 0.3 mm (0.012 in) or
more.
• If the thickness is less than wear thickness + 0.3 mm (0.012 in), replace the disc rotor.
Thickness
Check the thickness of the disc rotor using a micrometer. Replace
the disc rotor if the thickness is below the wear limit.
ADJUSTMENT
CAUTION:
• Burnish contact surfaces between disc rotors and pads according to the following procedure after
refinishing or replacing disc rotor, or if a soft pedal occurs at very low mileage.
• Be careful of vehicle speed because the brake does not operate firmly/securely until pad 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.
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.
Limit
Runout
: Refer to
Limit
Wear thickness
: Refer to
BRA0580D
Limit
Wear thickness
: Refer to
Thickness variation
: Refer to
SBR020B
BR-16
< PERIODIC MAINTENANCE >
REAR DISC BRAKE
REAR DISC BRAKE
BRAKE PAD
BRAKE PAD : Inspection and Adjustment
INFOID:0000000005234172
INSPECTION
1 Piston Type
Check brake pad wear thickness from an inspection hole on cylinder
body. Check using a scale if necessary.
2 Piston Type
Check brake pad wear thickness from an inspection hole on caliper.
Check using a scale if necessary.
ADJUSTMENT
CAUTION:
• Burnish contact surfaces between pads according to the following procedure after refinishing or
replacing pads, or if a soft pedal occurs at very low mileage.
• Be careful of vehicle speed because the brake does not operate firmly/securely 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.
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.
DISC ROTOR
DISC ROTOR : Inspection and Adjustment
INFOID:0000000005234173
INSPECTION
Appearance
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace it if necessary.
Runout
Limit
Wear thickness
: Refer to
.
BRA0010D
Limit
Wear thickness
: Refer to
.
PFIA0227J
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