22
5
13
0,6 - 1,2 mm
» Y081564 - (EN - REV. 003) | JUNE 2022
FUNCTIONAL AND VISUAL CHECK
5.2 Adjuster Check
5.2.1.1 Before starting work, ensure that the wheels are
chocked and the vehicle cannot roll away.
5.2.1.2
Ensure that service brake and parking
brake, as well as bus stop temporary hold brake, if
fitted, are in the released condition.
5.2.1.3 Check the supply pressure of the brake system
(should be > 6.5 bar). Connect an additional external supply
to prevent pressure drop.
5.2.1.4 Jack up the axle and remove the wheel (refer to the
respective vehicle /axle manufacturer’s instructions)
5.2.1.5 Check the brake disc temperature, it should be
between -10°C and 50°C.
5.2.2 Push and pull caliper three times in axial direction
to assess any existing air gap (see Fig.). If no movement
is possible, clean the disc brake and if necessary, replace
the bearings (see Section 9). Once movement is obtained,
continue as follows:
5.2.2 - Push caliper three times in axial direction
Removal of the adjuster cap (37) with a screwdriver, or
similar, is not allowed since the seal may be damaged.
5.2.3 Pull off the adjuster cap (37) using the tag, taking care
not to lose the shear adapter (61) (see Fig.).
5.2.5 Set the starting gap by turning the adjuster (23) with
the shear adapter (61) backwards and then forwards (note
that when turning backwards a noticeable clicking can be
heard and felt), until a value of
1.3 mm
air gap has been
achieved (measure between the brake pad and Tappets (13).
5.2.6 Apply the brakes
20x
with medium pressure (ca. 2-3
bar).
5.2.4 Insert new brake pads (see Section 6.2)
5.2.3 - 5.2.5 - Remove cap, insert new brake pads, set the starting gap
5.2.7 - Check gap between tappets and inboard pad
If the clearance is too great, there is a danger of brake
failure. If the clearance is too small, there is a danger
of overheating that may lead to consequential
damage.
5.2.7 Check the gap between each of the tappets (13) and
inboard pad backplate (12). This must be measured over
the whole tappet surface of both tappets using two feeler
gauges simultaneously (feeler gauges must be at least
220
mm
long) (see Fig.).
If the gap difference between the two tappets is
>
0.25 mm
then the caliper bearing clearance must be checked
(see Section 5.3).
In addition each gap must measure between
0.6 - 1.2 mm.
Backwards
For
war
ds
61
23
x3
37
220 mm
