SEAT Workshop Service and Repair Manuals

Removing and installing pistons for front brake calliper Consult the equivalence table for tools and equipment according to applicability between Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Torque wrench -V.A.G 1331-, see equivalent → Anchor.

t	Torque wrench -V.A.G 1332-, see equivalent → Anchor.

t	Piston resetting tool -T10145 -, see equivalent → Anchor

t	Removal wedge -3409-, see equivalent → Anchor

t	Assembly tool for protective caps -T10146/5-

t	Assembly paste → Spare parts catalogue

Removal:

–  Force piston out of brake calliper housing using compressed air.   Note Place a piece of wood in the cavity so that the piston does not get damaged.

–  Lever out the seal using the removal wedge -3409-.   Note When removing protect the cylinder from damage. Installation –  The piston and join ring surfaces can only be cleaned using alcohol and immediately dried. –  Before fitting the piston and seal ring, apply a thin coating of assembly paste → Parts catalogue

–  Insert inner seal in groove in brake calliper housing with removal wedge 3409.

–  Insert protective cap with special tools -1- and -2- under pressure. 1 -  Assembly tool for protective caps -T10146/1- 2 -  Piston resetting appliance -T10145- Use jaw protectors.

–  Push protective cap onto brake calliper housing and press it in so that it is seated flush -arrow-. –  Do not remove protective cap from brake calliper housing by hand. –  Before fitting the piston and seal ring, apply a thin coating of assembly paste → Parts catalogue

–  Lift up piston with standard extension and ratchet attachment as shown in illustration and press lightly onto protective cap. Keep the piston straight to avoid damaging the seal. –  Balloon protective cap with compressed air (max. 3 bar) which causes the protective cap to slide beyond brake piston. Use jaw protectors. –  Manually press piston into brake calliper housing under pressure   Note The outer sealing lip of the protective cap will then locate in the groove on the piston.