Rear Brake Caliper Piston

Rear Brake Caliper Piston

Special tools, testers and auxiliary items required

• Torque Wrench 5-50 Nm (V.A.G 1331)

• Torque Wrench 40-200 Nm (V.A.G 1332)

• Piston Resetting Tool (T10145)

• Trim Removal Wedge (3409)

• Vehicle Diagnostic Tester (VAS 5051B) or (VAS 5052)

Removing

- Remove pistons as far as possible from brake caliper.

- Force piston out of brake caliper housing using compressed air.






• Be careful not to damage the surface of the cylinder while removing the seal.

• Place a wooden board into the recess of the caliper housing so it is not damaged.

- Remove old seal from brake caliper with (3409).






Installing

- Install new seal in brake caliper.






- Place new protective cap on brake pistons as shown.






- Install pressure nut to dimension - a - 15 mm.






- Insert protective cap in brake caliper groove. Use (3409) to do so.






- Carefully slide brake piston into brake caliper. Move brake piston when doing so. Brake piston must be guided over pressure nut, this is only possible in four positions.

- After brake piston has been guided onto pressure nut, press it as far as stop into brake caliper.






• Make sure that pressure nut is not damaged.

- Install the pressure nut clockwise as far as the stop.






- Make sure the rubber makes contact around brake caliper housing - arrows -.






- Press the piston into the brake caliper by hand.






• The inner sealing lip of the protective cap thereby slips into the groove on the piston.