Test Brake System With Pressure Tester For Leaks - AR42.10-P-0015FR
Model 257
Model 290
Shown on model 257
| Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 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 | |
| Topical note | Notes on externally invisible Brake fluid loss | AH42.10-P-9406-02A | |
| Topical note | Notes on repairs to Brake system | AH42.00-P-0003-01A | |
| Topical note | Brake fluid notes | AH42.50-P-0001-01A | |
| Notes on safety-relevant components | AH00.00-Z-0019-01A | ||
| Check | |||
| 1 | Remove cover over Brake fluid reservoir (1). | ||
| 2 | Clean area around cap of Brake fluid reservoir (1). | Assembly cleaner | *BR00.45-Z-1028-04A |
| 3 | Unscrew cap of Brake fluid reservoir (1). | ||
| 4 | Connect filling unit to Brake fluid reservoir (1). | ||
| 000 588 01 82 00 Filling unit | WS25.00-P-0016B | ||
| Brake fluids (DOT 4 plus) | BB00.40-P-0331-00A | ||
| General Brake fluid | BB00.40-P-0330-01A | ||
| 5 | Raise vehicle. | AR00.60-P-1006A | |
| 6 | Remove vent screw from front left Brake caliper (2) and connect test equipment (3). | ||
| 000 588 07 21 00 Test equipment | WS42.00-P-0014B | ||
Do not use test equipment (3) for hydraulic oil systems on systems with Brake fluid. Otherwise, the Brake fluid will be mixed with mineral oil, which can cause Brake failure. |
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| 7 | Bleed test equipment (3). | ||
| 8 | Start engine and run. | ||
| 9 | Depress Brake pedal and insert Brake pedal jack (4) with adapter between Brake pedal and driver's seat. | ||
| Fig 1 | |||
| Fig 2 | |||
| 10 | Read off and note Brake pressure on high-pressure manometer of test equipment (3). | ||
| 11 | Read off Brake pressure again on high-pressure manometer of test equipment (3) after the specified test period and compare against previously-noted value. | Check values for leak test If there is a problem, ↓ determine cause and repair Brake system. |
*BE42.10-P-1001-19A |
| 12 | Switch off engine and remove Brake pedal jack (4) with adapter. | ||
| 13 | Remove vacuum in BAS Brake booster (A7/7) by depressing Brake pedal several times. | ||
| 14 | Depress Brake pedal and insert Brake pedal jack (4) with adapter between Brake pedal and driver's seat. | Fig 1 | |
| Fig 2 | |||
| 15 | Slowly turn back Brake pedal jack (4) until the low-pressure manometer of the test equipment (3) displays the specified Brake pressure. | Check values for leak test | *BE42.10-P-1001-19A |
| 16 | Read off Brake pressure on low-pressure manometer of test equipment (3) after the specified test period. | Check values for leak test If there is a problem, ↓ determine cause and repair Brake system. |
*BE42.10-P-1001-19A |
| 17 | Remove cover on Brake pedal, on driver's sea and on Brake pedal jack (4) with adapter. | ||
| 18 | Disconnect test equipment (3) from Brake caliper (2) and screw vent screw all the way into Brake caliper (2). | ||
| 19 | Bleed front left Brake caliper (2). | AR42.10-P-0010-02FR | |
| *BA42.10-P-1003-10BA | |||
| *BA42.10-P-1003-10X | |||
| 20 | Disconnect filling unit from Brake fluid reservoir (1). | ||
| 21 | Correct fluid level in Brake fluid reservoir (1). | ||
| AP42.10-P-4210B | |||
| 22 | Seal Brake fluid reservoir (1) with cap. | ||
| 23 | Install cover over Brake fluid reservoir (1). | ||
| 24 | Lower vehicle. | AR00.60-P-1006A |
HYDRAULIC BRAKE SYSTEM
| Number | Designation | Model 257 | Model 290 | |||
|---|---|---|---|---|---|---|
| BE42.10-P-1001-19A | Check values for leak test | High-pressure test | Test period | min | 5 | 5 |
| Brake pressure loss | % | 5 | 5 | |||
| Low-pressure test | Brake pressure | bar | 3 | 3 | ||
| Test period | min | 2 | 2 | |||
| Brake pressure loss | bar | 0 | 0 | |||
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 290 | |
|---|---|---|---|
| BA42.10-P-1003-10BA | Bleed screw at Brake caliper | Nm | 14 |
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 257 (except 257.361) | Model 257.361 | |
|---|---|---|---|---|
| BA42.10-P-1003-10X | Bleed screw at Brake caliper | Nm | 14 | 14 |
REPAIR MATERIALS
| Number | Designation | Order number |
|---|---|---|
| BR00.45-Z-1028-04A | Assembly cleaner | A 000 986 56 01 |