Infiniti QX56 (JA60). Manual — part 112
BR-8
< BASIC INSPECTION >
FRONT DISC BRAKE
Check thickness of the disc rotor using a micrometer. Replace disc
rotor if thickness is less than the wear limit.
Standard thickness
: Refer to
.
Repair limit thickness
: Refer to
.
Thickness variation
(Measured at 8 positions)
: Refer to
.
SBR020B
REAR DISC BRAKE
BR-9
< BASIC INSPECTION >
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REAR DISC BRAKE
BRAKE PAD
BRAKE PAD : Rear Pad Inspection
INFOID:0000000005147892
PAD WEAR
Check pad thickness from the inspection holes on cylinder body.
Check using a scale if necessary.
DISC ROTOR
DISC ROTOR : Rear Rotor Inspection
INFOID:0000000005147893
VISUAL
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace as necessary.
RUNOUT
1. Attach disc rotor to wheel hub using wheel nuts (at two or more
positions).
2. Inspect runout using dial gauge placed at 10 mm (0.39 in) inside
disc edge.
NOTE:
Before measuring, make sure that wheel bearing axial end play
is within the specification. Refer to
.
3. When runout exceeds limit value, displace mounting positions of disc rotor by one hole. And then find a
position of the minimum value for runout.
4. If runout is outside the specified value after performing the above operation, turn disc rotor using Tool.
THICKNESS
Check the thickness of the disc rotor using a micrometer. Replace
disc rotor if the thickness is less than the wear limit.
Standard thickness
: Refer to
.
Repair limit thickness
: Refer to
.
BRA0010D
Runout limit
: Refer to
(With it attached to the vehicle)
Tool number
: 38-PFM90.5 ( — )
BRA0697D
Standard thickness
: Refer to
.
Repair limit thickness
: Refer to
.
Thickness variation
(Measured at 8 positions)
: Refer to
.
SFIA2284E
BR-10
< BASIC INSPECTION >
BRAKE BOOSTER
BRAKE BOOSTER
Inspection
INFOID:0000000005147894
OPERATION
With engine stopped, change vacuum to atmospheric pressure by
depressing brake pedal several times. Then with brake pedal fully
depressed, start engine and when vacuum pressure reaches the
standard, make sure that clearance between brake pedal and floor
panel decreases.
AIR TIGHT
• Run engine at idle for approximately 1 minute, and stop it after
applying vacuum to booster. Depress brake pedal normally to
change vacuum to atmospheric pressure. Make sure that distance
at intervals of 5 seconds between brake pedal and floor panel
gradually increases.
• Depress brake pedal while engine is running, and stop engine with pedal depressed. The pedal stroke
should not change after holding pedal down for 30 seconds.
BRA0037D
SBR365AA
VACUUM LINES
BR-11
< BASIC INSPECTION >
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VACUUM LINES
Inspection
INFOID:0000000005147895
VISUAL INSPECTION
Check for improper assembly, damage and deterioration. Replace as necessary.
CHECK VALVE INSPECTION
Airtightness Inspection
Use a suitable tool to check. Connect to brake booster side of check
valve.
Check valve specification
: Refer to
.
LFIA0217E
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