SEAT Workshop Service and Repair Manuals

Piston for front brake caliper: removal and installation Special tools and workshop equipment required

t  Plastic wedge -U-30800-

t  Piston retraction tool -T20055- t  G 052 150 A2 Assembly paste Removing

–  Release the piston from the brake caliper applying compressed air.   Note! Place a pice of wood in the box so that the piston does not get damaged.

–  Extract the gasket ring with the -U-30800- installation wedge.   Note! Make sure the cylinder surface is not damaged during disassembly. Installation –  Clean piston and seals only with alcohol. –  Before fitting the piston and seal, apply a thin coating of G 052 150 A2 assembly paste. –  Fit seal to brake caliper.

–  Fit the outside sealing protective cover with sealing lip over the piston.

–  Insert the inside sealing lip into the groove of the cylinder using wedge -U-30800-.   Note! During this operation, the piston has to be supported in front of the brake caliper housing.

–  Insert the piston into the brake caliper housing using the device for retracting piston -T20055-.   Note! In the course of this operation the outside seal seats into the groove in the piston.