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» Pneumatic Disc Brake SL7 - SM7
FUNCTIONAL AND VISUAL CHECK
5.3 Caliper Check
Caliper Running Clearance
Before starting work, ensure that the wheels are chocked
and the vehicle cannot roll away.
Ensure that service brake and parking brake, as well
as the bus stop temporary hold brake, if fitted, are in
the released condition.
Caliper Movement along Guide Pins
5.3.1 By pushing and pulling the caliper in an axial direction
by hand, a movement within the running clearance (see
Section 5.2) must be possible (see Fig.).
If, even using a high level of hand pressure (no tools), the
caliper is not moveable the caliper guide pin seals must be
examined (see Section 5.5).
5.3.2 If necessary clean the protruding area of the guide
pin (4) from outside of the caliper and remove any light
corrosion using an emery cloth.
5.3.3 Lightly apply grease (order No. II14525, K093430 or
II32868) to the protruding area of the guide pin (4).
5.3.4 Remove brake pads (see Section 6.1).
5.3.5 Fully wind back the tappets (13) using a ring spanner
and shear adapter (61) (see Fig.).
5.3.6 Push caliper inboard towards vehicle’s centre (see
Fig.)
5.3.7 Clean guide pin (4) from the inner area of the caliper,
removing any dirt or corrosion.
5.3.8 Lightly apply grease (order No. II14525, K093430 or
II32868) to this area of guide pin (4).
5.3.9 Caliper (1) must slide freely along the whole length
of the guide pin arrangement; movement should be greater
than
25 mm
. (see Fig.).
If the caliper does not move at least
25 mm
, the caliper guide
pin seals must be examined (see Section 5.5).
5.3.1 - Push and pull hand test
5.3.5 - 5.3.6 -Rewind tappets completely and push caliper in direction of
middle of vehicle
5.3.9 - Free movement of caliper >
25 mm
5.3.7 - Free guide pin of dirt
> 25 mm
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