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» Y081564 - (EN - REV. 003) | JUNE 2022
FUNCTIONAL AND VISUAL CHECK
5.4 Clearance Measurement Check of Bearing
Variants (6)
Note:
Before commencing (removing the wheel), make sure
there is no contact between caliper and axle, vehicle, chassis
sections or carrier. In such cases it will be necessary to replace
the caliper bearings (see Section 9).
To measure the clearance, the following steps must be taken:
5.4.1 Remove the wheel, refer to vehicle manufacturer’s
recommendations.
5.4.2 Remove pad retainer (11) (see Section 6.1.2)
To achieve the correct reading it is necessary to have a pair of
new brake pads fitted. If the clearance measuring is not taking
place during a brake pad replacement, the current position of
the assembled pads must be noted before removing, so that
they can be re-assembled in the same position.
Remove old pads (see Section 6) (at this point Section 5.1 “Wear
Check of Pads and Brake Discs” must also be observed) and
replace with a pair of new pads.
5.4.3 Fasten a magnetic dial-gauge holder to the carrier (2)
on the floating bearing side of the caliper (1). Use the casting
tag on the caliper (1) as the measuring point - see arrows
A
(see Fig.).
5.4.4 Set the dial-gauge to zero.
5.4.5 Place a suitable tool (e.g. screwdriver with at least
200 mm in length) in a central position between carrier (2)
and caliper (1) and lever them in opposite directions (using
normal hand-force) (see Fig.).
5.4.6 Read the maximum value of the bearing clearance
on the dial-gauge. The clearance must not exceed the given
tolerance of
2.0 mm
, otherwise the rubber bush (6) will need
replacing using a guide and seal kit (see Section 1.2 and
Section 10.2).
If the clearance exceeds the given tolerance, the complete
bearing will need replacing using the relative service kit (see
Section. 1.2 and Section. 9).
If the clearance measuring is not taking place during a brake
pad replacement, the new pads should be removed and the
previously marked brake pads fitted in their original positions,
otherwise renew the brake pads as an axle set and adjust the air
gap (see Section 6.2).
5.4.7 Fit the wheel (refer to vehicle manufacturer’s
recommendations). After replacing the wheel check that it
runs interference free.
5.4.3 - 5.4.5 - Obtaining maximum value of bearing clearance
5.4.6 - Maximum bearing clearance tolerances of bearing variants
Bearing variants (6)
Max. bearing clearance
6a Rubber Bush
2 mm
6b Open Bearing
2 mm
6f Double Roll Bearing
2 mm
AA
1
2
12
