Rear Brakes, CII 38 and C II 41 Brake Calipers
Rear Brakes, CII 38 and C II 41 Brake Calipers
=> [ Brake Pads ]
=> [ Brake Caliper ]
Brake Pads
Special tools, testers and auxiliary items required
• Vehicle Diagnostic, Test and Information System (VAS 5051)
• Diagnostic Cable (VAS 5051/1) or (VAS 5051/3)
• Torque Wrench (V.A.G 1331)
• Piston Resetting Tool (T10145)
Removing
When removing, mark brake pads that will be used again. Install in the same position, otherwise braking effect will be uneven!
• Do not disconnect the connectors from the parking brake motors.
• Electro-mechanical parking brake not actuated.
- Remove wheels.
The pistons on the electro-mechanical parking brake must be driven back using the (VAS 5051).
Before pressing piston back, draw off brake fluid from reservoir using a bleeder bottle. Otherwise, especially if reservoir has been topped off, fluid will overflow and cause damage.
- (VAS 5051), connecting and selecting functions => [ VAS 5051, Connecting and Selecting Functions ] Scan Tool Testing and Procedures.
- Select the electro-mechanical parking brake and the function Moving piston of parking brake motor out and in.
- Drive the pistons back using the (VAS 5051).
- Then, remove the bolts from the brake caliper, while counter-holding the guide pins.
- Remove brake caliper downward from brake carrier.
• Resetting the piston with (VAS 5051) is often not sufficient but necessary! The pressure nut in the piston is a floating mount so the piston can only be pressed and cannot be pulled back. Only the spindle with the pressure nut is moved back.
CAUTION!
The piston must first be reset with (VAS 5051).
- Now press piston all the way back with (T10145).
- Secure the brake caliper with wire so the weight of caliper does hang from or damage the brake line.
- Remove brake pads and anti-rattle springs - arrows -.
Cleaning:
CAUTION!
Do not blow brake system using compressed air, the dust produced is harmful to health!
- Thoroughly clean contact surfaces for brake pads at brake carrier, remove corrosion.
- Clean brake caliper.
Use only appropriate solvents for cleaning brake caliper.
Installing
- Insert brake pad retention plates - arrows - and brake pads in brake carrier.
- Make sure that the brake pads are located correctly in the anti-rattle springs - arrows -.
- Secure brake caliper using new self-locking bolts.
• The repair kit includes four self-locking hex bolts which must be installed in all cases.
After driving the pistons out with the (VAS 5051), a basic setting of the brake system must be performed.
- Perform the brake system basic setting with the (VAS 5051).
- Install wheels.
• Check brake fluid level after replacing brake pad.
Brake Caliper
Special tools, testers and auxiliary items required
• Torque Wrench (V.A.G 1331)
• Brake Pedal Actuator (V.A.G 1869/2)
• Vehicle Diagnostic, Test and Information System (VAS 5051)
• Diagnostic Cable (VAS 5051/1) or (VAS 5051/3)
Removing
Work procedure applies only for replacing or when performing subsequent service work on brake caliper.
• Do not disconnect the connectors from the parking brake motors.
- Remove wheels.
The pistons on the electro-mechanical parking brake must be driven back using the (VAS 5051).
Before pressing piston back, draw off brake fluid from reservoir using a bleeder bottle. Otherwise, especially if reservoir has been topped off, fluid will overflow and cause damage.
- (VAS 5051), connecting and selecting functions. Refer to => [ VAS 5051, Connecting and Selecting Functions ] Scan Tool Testing and Procedures.
- Select the electro-mechanical parking brake and the function moving piston of parking brake motor out and in.
- Drive the pistons back using the (VAS 5051).
- Remove the parking brake motor without disconnecting the connector.
- Connect bleeder hose of bleeder bottle to bleeder valve of brake caliper and then open bleeder valve.
- Insert (V.A.G 1869/2).
- Close bleeder valve and remove bleeder bottle.
- Remove the brake line from the brake hose and brake caliper.
- Remove both bolts from brake caliper, counterhold on guide pin when doing this.
- Pull off brake caliper from brake carrier.
Installing
• Brake pads sit in retaining springs on the brake carrier.
- Secure brake caliper on brake carrier using new self-locking bolts.
Ring groove and contact surface of parking brake motor must be clean.
- Install new seal.
- Turn the spindle back slightly, with help of a TORX(R) insert T45, until the parking brake motor can be correctly positioned.
- Carefully set the parking brake motor in place, paying attention to the seat of the seal.
- Rotate the parking brake motor until the bolt hole and threads are aligned.
Make sure that the parking brake motor is seated flush against the brake caliper. Do not, under any circumstances, pull the parking brake motor against the brake caliper using the bolts.
- Set the TORX(R) bolts in place by hand and then tighten.
- Screw brake line on brake caliper.
- Bleed brake system. Refer to => [ Brake System, Bleeding ] Brake System, Bleeding.
After driving the pistons out with the (VAS 5051), a basic setting of the brake system must be performed.
- Perform the basic setting of the brake system with the (VAS 5051).
- Install wheels.
• Check brake fluid level.
