Page 32 - KNORR Pneumatic Disc Brake

7

Tappet and Boot Assemblies (13) and Inner Seals (22) Replacement

7.1 Removal of Tappet and Boot Assemblies (13)

Note: The removal of the tappet and boot assemblies (13) < 30 mm
can be done with the brake caliper fitted to, or removed
from, the vehicle (see Section 8)

With Caliper Fitted: 13

7.1.1. Wind-out the adjuster (23) using the shear adapter
(61) until the boots are easily accessible (max 30 mm) (see
Section 5.4.2), and, with a suitable lever, carefully prise the
boot away from the caliper (see Fig.).

7.1.1 - Wind-out the adjuster, prise out the inner boot.

7.1.2. Using tool (A), correctly positioned between the
caliper and the boot, carefully drive it down with the aid of a A A
hammer to release each tappet and boot assembly (13) from
its threaded tube (16) (see Figs.). 13

16
13

7.1.3. Remove the old tappet bush (161) (see Fig.).

7.1.2a - Remove tappet and boot assembly using tool (A)

7.1.4. Check inner sealing face (arrow X ) (see Fig.).
13 A
This sealing face must not be damaged. It
cannot be replaced. If it is damaged, the caliper
must be replaced. (see Section 8). X
22
Note: When replacing tappet and boot assemblies (13), the
inner seals (22) must also be replaced (see Section 7.2).

161

7.1.2b - Drive down wedge fork 7.1.3 - 7.1.4 - Remove old tappet
using hammer bush, check sealing face

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