Suzuki XL7 2007 Service Manual page 1310

4C-8 Rear Brakes:
Brake Rotor Thickness Measurement
WARNING
!
Refer to "Brake Dust Caution: ".
1. If the inboard friction surface of the brake rotor is not
accessible, reposition and support the caliper with
the brake pads. Refer to "Front Disc Brake Pads
Replacement: " and/or "Rear Disc Brake Pads
Replacement".
2. Clean the friction surfaces of the brake rotor with
denatured alcohol, or an equivalent approved brake
cleaner.
3. Using a micrometer calibrated in thousanths-of-a-
milimeter, or ten-thousanths-of-an-inch, measure
and record the lowest thickness of the brake rotor at
4 or more points, equally spaced around the rotor.
Ensure that the measurements are only taken within
the friction surfaces and that the micrometer is
positioned the same distance from the outside edge
of the rotor, about 13 mm (½ in), for each
measurement.
4. Compare the lowest thickness measurement
recorded to the following specifications:
Specification - Front
Brake rotor discard thickness: 27.4 mm (1.079 in)
Specification - Rear
Brake rotor discard thickness: 18.4 mm (0.724 in)
5. If the lowest thickness measurement of the brake
rotor is above the minimum allowable thickness after
refinishing specification, the rotor may be able to be
refinished, depending upon surface and wear
conditions which may be present.
6. If the lowest thickness measurement of the brake
rotor is at or below the minimum allowable thickness
after refinishing specification, the rotor may not be
refinished.
7. If the lowest thickness measurement of the brake
rotor is at or below the discard thickness
specification, the rotor requires replacement.
Brake Rotor Thickness Variation
Measurement
WARNING
!
Refer to "Brake Dust Caution: ".
NOTE
Any disc brake rotor that exhibits thickness
variation exceeding the maximum acceptable
level must be refinished or replaced.
Thickness variation exceeding the maximum
acceptable level can cause brake pulsation.
1. If the inboard friction surface of the brake rotor is not
accessible, reposition and support the caliper with
the brake pads. Refer to "Front Disc Brake Pads
Replacement: " and/or "Rear Disc Brake Pads
Replacement".
2. Clean the friction surfaces of the brake rotor with
denatured alcohol, or an equivalent approved brake
cleaner.
3. Using a micrometer calibrated in thousanths-of-a-
millimeter, or ten-thousanths-of-an-inch, measure
and record the thickness of the brake rotor at four or
more points, evenly spaced around the rotor.
Ensure that the measurements are only taken within
the friction surfaces and that the micrometer is
positioned the same distance from the outer edge of
the rotor, about 13 mm (0.5 in), for each
measurement.