SEAT Workshop Service and Repair Manuals

Removing and installing brake caliper piston Special tools and workshop equipment required

t  Removal wedge -3409-

t  Piston resetting appliance -T10145- Removing: –  Force piston out of brake caliper using compressed air.

Place a piece of wood in the cavity so that the piston does not get damaged.

–  Remove seal using wedge 3409. When removing protect the cylinder from damage. Installing: –  The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried. –  Thinly coat piston and seal with assembly paste G 052 150 A2 before inserting. –  Insert the seal into the brake caliper.

–  Place protective cap with outer sealing lip on piston.

–  Insert inner sealing lip into groove in cylinder using wedge 3409. When doing this, hold piston in front of brake caliper.

–  Press piston into brake caliper using piston resetting tool. The outer sealing lip on the protective cap will then slip into the piston groove.