473919 Removing and installing front brake calliper

WM 473919 Removing and installing front brake caliper

Tools






Preliminary work

1. Raise the vehicle. -> 4X00IN01 Lifting the vehicle Service and Repair.
2. Remove the wheel. -> 440519 Removing and installing wheel Removal and Replacement.


Removing front brake caliper (standard brake system and PCCB)

1. Open combination plug connection and pull out connector for brake pad wear indicator.
2. Remove brake caliper.
2.1. Use the piston resetting fixture Nr.144 or brake piston resetting fixture 9472 (PCCB brakes) to push the brake pads back slightly and uniformly -direction arrow-.





Pushing back brake pad

2.2. Loosen the brake line -1- on the brake caliper. Close off the brake line and brake caliper using suitable stoppers.





Removing/fitting brake line/brake caliper

2.3. Loosen fastening screws -2- and remove the brake caliper (with brake pads fitted).



Installing front brake caliper (standard brake system and PCCB)

1. Fit brake caliper on the wheel carrier. Use new fastening screws -2-. Tightening torque: 85 Nm (63 ftlb.).





Removing/fitting brake line/brake caliper

Fit the brake line -1- on the brake caliper.
Tightening torque for brake line -1- = 16 Nm (12 ftlb.).
2. Route brake pad wear indicator wire and connect the connector to the combination plug connection. Lock combination plug connection.
3. Bleed the brake system and adjust the brake fluid level -> 470107 Bleeding the brake system Service and Repair.

Bedding in the brake pads - standard brake system

New brake pads require a bedding-in period of approx. 200 km. Only then do they achieve their maximum braking effect. The slightly reduced braking effect must be compensated for by increased pressure on the brake pedal. The same also applies after a brake disc change.

Bedding in the brake pads - PCCB

New brake pads require a slightly longer bedding-in period for PCCB brake discs than cast iron brake discs.

In general, the following applies: New brake pads must be worn in (bedding-in period), their optimum braking effect is not reached until after a few hundred kilometres. The slightly reduced braking effect must be compensated for by increased pressure on the brake pedal. The same also applies after changing brake discs.

Subsequent work

1. Fit wheel -> 440519 Removing and installing wheel Removal and Replacement.