Subaru IMPREZA GD 2007 Series Manual page 3231

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BRAKE
C: INSPECTION
1) Check the front wheel bearing looseness and
axle hub play before the inspection of disc rotor
runout limit. <Ref. to DS-23, INSPECTION, Front
Axle.>
2) Secure the disc rotor by tightening the five wheel
nuts.
3) Set a dial gauge 10 mm (0.39 in) inward from the
disc rotor outer circumference. Rotate the disc rotor
to check runout. If the runout of disc rotor exceeds
the service limit, grind the disc rotor. After grinding,
check the thickness of the disc rotor according to
the procedure in step 4).
Disc rotor runout limit:
0.075 mm (0.0030 in)
4) Set a micrometer 10 mm (0.39 in) inward from
the disc rotor outer perimeter, and then measure
the disc rotor thickness. If the thickness of disc ro-
tor exceeds the service limit, replace with a new
disc rotor.
A
Standard
24 mm
15"
(0.94 in)
Disc rotor 24 mm
16"
thickness A (0.94 in)
30 mm
17"
(1.18 in)
Front Disc Rotor
BR-00019
B
BR-00018
Disc rotor
Limit outer
diameter
22 mm 277 mm
(0.87 in) (10.91 in)
22 mm 294 mm
(0.87 in) (11.57 in)
28 mm 326 mm
(1.10 in) (12.83 in)
BR-22