Remove/check/install front axle brake pads - AR42.10-P-1600W
MODEL 172 (except 172.466/475) With single-piece brake caliper support
| 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 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 | ||
| Clean | |||
| 1 | Clean area around cap on expansion reservoir for brake fluid | ||
| Remove | |||
| 2 | Unscrew the cap on the brake fluid expansion reservoir and suction off some brake fluid | ||
| 3 | Remove front wheel-and-tire assemblies | ||
| AP40.10-P-4050V | |||
| 4 | Disconnect right front brake wear sensor (S10/2) from right front brake wear sensor electrical connector (S10/2x1) | ||
| 5 | Remove screws/bolts (6) from sliding bolts (10) | ||
| *BA42.10-P-1004-10J | |||
| 6 | Remove brake caliper (1) from brake caliper support (2) | Do not kink the brake hose (5) or subject it to tensile loads. To relieve the load on the brake hose (5), secure the brake caliper (1) to the vehicle free of tension. Otherwise the brake hose (5) will be damaged. |
|
| 7 | Remove brake linings (7) from brake caliper support (2) | ||
| 8 | Pull right front brake lining wear sensor (S10/2) out of brake lining (7) | ||
| Measure | |||
| 9 | Check condition of brake linings (7) and measure degree of wear | ||
| AP42.10-P-4253A | |||
| If necessary ↓ Replace brake linings (7) |
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| 10 | Check condition of brake disk (3) and measure degree of wear | ||
| AP42.10-P-4258V | |||
| If necessary ↓ Replace brake disks (3) |
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| AR42.10-P-0220W | |||
| 11 | Check brake caliper (1) and dust boot (4) on brake piston for damage and replace if necessary | AR42.10-P-0070W | |
| 12 | Check boots (9) for damage and correct seating as well as sliding bolts (10) for ease of movement and replace if necessary | AR42.10-P-0070W | |
| Install | |||
| 13 | Press back brake piston using pusher tool (01) | If brake piston is sluggish ↓ Replace brake caliper (1) |
Figure |
| AR42.10-P-0070W | |||
| Clean | |||
| 14 | Clean contact surfaces of brake linings (7) on brake caliper (1) and on brake caliper support (2) | When doing so, do not damage the dust boot (4) on the brake piston. Do not use sharp-edged or pointed objects. Otherwise the brake caliper (1) or brake caliper support (2) will be damaged. |
|
| Assembly cleaner | *BR00.45-Z-1028-04A | ||
| 15 | 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. | AS42.50-Z-0002-01A | |
| 16 | Depress brake pedal several times until brake linings (7) rest against brake disks (3) | ||
| Check | |||
| 17 | Check fluid level in brake fluid reservoir, and correct if necessary | ||
| AP42.10-P-4210V | |||
| 18 | Carry out brake test on the test stand | ||
| AP42.00-P-4290BA |
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 172 | ||
|---|---|---|---|---|
| BA42.10-P-1004-10J | Guide pin, brake caliper to brake caliper support | M8X28 | Nm | 34 |
| M8X70 | Nm | 29 | ||
| M10 | Nm | - | ||
| M8x42 | Nm | - | ||
REPAIR MATERIALS
| Number | Designation | Order note |
|---|---|---|
| BR00.45-Z-1028-04A | Assembly cleaner | Adolf Wurth GmbH & Co. KG |