Sliding caliper disk brake including a central return spring of an exterior brake shoe including wear play compensation means, spring and replacement kit

A motor vehicle disk brake (10) that includes:

• a brake disk (12) that lies in a plane transverse to an axially oriented rotation axis (A) of the disk;
• a support (14) fixed relative to a chassis of the vehicle;
• a caliper (36) that is mounted to slide axially relative to the fixed support (14) and that includes:
• a rear casing (41) in which a brake piston (46) is mounted to slide axially to cooperate, toward the front, with an interior brake shoe (18I) that includes a friction lining (24I) a transverse front friction face (25I) of which cooperates with an associated braking track (22I) of the disk (12);
• a front flange (42), axially fixed to the casing (41) to cooperate with an exterior brake shoe (18E) that includes a friction lining (24E) a transverse rear friction face (25E) of which cooperates with an associated braking track (22E) of the disk (12);
• the exterior brake shoe (18E) being mounted to slide axially in the fixed support (14) between a rear active position in which said friction face (25E) bears against the associated annular track (22E) of the brake disk (12) and a front inactive position in which said transverse rear friction face (25E) is spaced axially from said associated annular track (22E) of the brake disk by a particular operating clearance (J1),
• wherein the disk brake includes an exterior return spring (48E) for returning the exterior brake shoe (18E) to its inactive position, a rear connecting portion (62) of the exterior return spring (48E) is fixed, directly or indirectly, to an associated central portion (63) of the exterior brake shoe (18E), and a front portion (50) of the exterior return spring (48E) is fixed axially to an associated central portion (58) of the fixed support (14).