Remove/install rear-axle brake caliper - AR42.10-P-0080RK
Model 231
| Risk of injury . Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid | Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. | AS42.50-Z-0001-01A | |
| Notes on handling, transport and storage of ceramic brake disks | AH42.10-P-9406-13A | ||
| Notes on self-locking nuts and bolts | AH00.00-N-0001-01A | ||
| Brake fluid notes | AH42.50-P-0001-01A | ||
| Notes on repairs to brake system | AH42.00-P-0003-01A | ||
| Notes on installing brake wear indicator contact sensors | AH42.10-P-0003-01CW | ||
| Remove/install | |||
| 1 | Move rear axle brake pads (10) into assembly position | Do not depress the service brake during "Move to assembly position" procedure. Otherwise the spindle in the brake caliper (3) will be damaged. |
AR42.10-P-1700-02W |
| 2 | Switch off ignition and remove transmitter key (A8/1) or KEYLESS-GO start/stop button (S2/3) from electronic ignition lock control unit (N73) | ||
| 3 | Open engine hood and raise to vertical position | ||
| Clean | |||
| 4 | Clean the area around the cap of the brake fluid reservoir | Assembly cleaner | *BR00.45-Z-1028-04A |
| 5 | Unscrew cap of brake fluid reservoir and extract some brake fluid | ||
| 6 | Remove rear wheels | ||
| AP40.10-P-4050EW | |||
| 7 | Disconnect right rear brake wear sensor electrical connector (S10/4x1) from right rear brake wear sensor (S10/4) | ||
| 8 | Remove bolt (4) and remove electrical connector of the right rear brake pad wear sensor (S104x1) | *BA42.10-P-1003-12J | |
| 9 | Unhook electrical line (16) from brackets (17) | ||
| 10 | Unhook electrical line (7) from retaining frame (8) | When replacing the brake caliper (3). | |
| 11 | Detach electrical connector (14) from left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2) | When replacing the brake caliper (3). | |
| 12 | Remove screws/bolts (1) from guide pin (5) | *BA42.10-P-1004-12J | |
| 13 | Detach brake hose (6) from brake caliper (3) | When replacing the brake caliper (3). Seal connections immediately. Otherwise brake fluid flowing out can cause damage to adjoining components. |
AR42.10-P-0013RK |
| Figure | |||
| 14 | Detach brake caliper (3) from brake caliper support (2) | Do not tension or kink brake hose (6). Attach brake caliper (3) to the vehicle free of tension to relieve the brake hose (6) and the electrical line (7). Otherwise the brake hose (6) and the electrical line (7) can be damaged. |
|
| 15 | Press back brake piston using pusher tool (01) | When reusing the brake caliper (3). |
Figure |
| 16 | Remove left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2) from the brake caliper (3) | When replacing the brake caliper (3). | AR42.20-P-0600RK |
| 17 | Remove brake pads (10) from brake caliper support (2) | When removing the brake caliper support (2). |
|
| 18 | Pull right rear brake pad wear sensor (S104) out of brake pad (10) | When replacing brake pads (10). |
|
| 19 | Remove spring steel sheets (11) from brake caliper support (2) | When removing the brake caliper support (2). | |
| 20 | Remove bolts (15) and remove brake caliper support (2) | When removing the brake caliper support (2). |
*BA42.10-P-1001-12J |
| Check | |||
| 21 | Check condition of brake pads (10) and gauge degree of wear | ||
| AP42.10-P-4253A | |||
| 22 | Check condition of brake disks (9) and gauge degree of wear | ||
| Model 231 except code B07 (Ceramic brake system) |
AP42.10-P-4258RK | ||
| Model 231 with code B07 (Ceramic brake system) If there is damage or wear: ↓ Install new brake disks (9). |
AP42.10-P-4258QQ | ||
| Remove/install brake disc | AR42.10-P-0220RK | ||
| 23 | Check brake caliper (3) and dust boot (13) on brake piston for damage | ||
| 24 | Check boots (12) for damage and correct seat | ||
| 25 | Check guide pin (5) for ease of movement | ||
| Clean | |||
| 26 | Clean contact surfaces of the brake pads (10) on brake caliper (3) and brake caliper support (2) using a rag | While doing so do not damage the dust boot (13) on the brake piston or the boots (12). Otherwise the brake caliper (3) or the brake caliper support (2) must be replaced. Do not use sharp-edged or pointed objects. Otherwise the dust boot (13) may be damaged. Assembly cleaner |
*BR00.45-Z-1028-04A |
| 27 | Install in the reverse order | ||
| Risk of accident when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work. | Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system. | ||
| 28 | Depress brake pedal several times until brake pads (10) rest against brake disks (9) | AS42.50-Z-0002-01A | |
| Check | |||
| 29 | Check fluid level in brake fluid reservoir, correct if necessary | ||
| AP42.10-P-4210V | |||
| 30 | Carry out brake test on the test stand | ||
| AP42.00-P-4290BA |
REAR AXLE BRAKE CALIPER
| Number | Designation | Model 231 | |
|---|---|---|---|
| BA42.10-P-1001-12J | Screw/bolt, brake caliper to hub/rotor assembly | Nm | 110 |
REAR AXLE BRAKE CALIPER
| Number | Designation | Model 231 | |
|---|---|---|---|
| BA42.10-P-1003-12J | Screw/bolt, brake wear sensor to brake caliper | Nm | 8 |
REAR AXLE BRAKE CALIPER
| Number | Designation | Model 231 | |
|---|---|---|---|
| BA42.10-P-1004-12J | Guide pin to brake caliper support | Nm | 35 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1028-04A | Assembly cleaner | Adolf Wurth GmbH&Co. KG |