AR42.10-S-0019A | Bleed brake system using HHT or Star Diagnosis | 28.9.10 |
MODEL 638
with CODE (BB0) Antilock brake system (ABS)
with CODE (CL0) Rear air suspension, lowerable and liftable
S42.50-0025-06
Brake system with code BB0 (ABS) and with code CL0 (Air suspension)
1 Right front brake
2 Left front brake
3 Right rear brake
4 Left rear brake
5 Brake booster
6 Brake fluid reservoir
7 Master brake cylinder
9 Right front brake hose
14 Left front brake hose
15 Brake hose, right rear
18 Brake hose, rear left
19 Right front brake line
20 Left front brake line
21 Hydraulic assembly
24 Brake line, right rear
25 Brake line, rear left
Danger! | Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes. | Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. | |
| Brake fluid notes | All models | |
| Notes on repairs to brake system | All models | |
| The brake fluid reservoir must not be completely drained so that no air enters the brake system. If the brake fluid reservoir is completely emptied, the entire bleeding procedure must be repeated. | ||
1 | Unscrew cap from brake fluid reservoir | ||
2 | Connect bleeder unit | Pay attention to manufacturer's operating instructions. | |
Bleeding pressure approx. 2-2.5 bar. | |||
Bleeding pressure | |||
Brake fluid | |||
Bleeder unit, pneumatic | |||
Bleeder unit, electric | |||
3 | Connect Star Diagnose Compact System or Hand-Held-Tester (HHT) | ||
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Hand-held tester | |||
Test cable | |||
Case | |||
HHT operating instructions | |||
Commercial vehicle test module | |||
4 | Bleed brake system with HHT/ STAR DIAGNOSIS, bleeder unit and additional manual assistance | Actuate ABS valves using handheld tester or Star Diagnosis Compact system. | |
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5 | Disconnect bleeding unit | Pay attention to manufacturer's operating instructions. | |
6 | Screw cap onto brake fluid reservoir (6) | ||
| Checking | ||
7 | Press brake pedal several times and check brake system for leaktightness | Only if, after bleeding the brake system, it is suspected that there is still air in the circuit, bleed the brake system again. | |
8 | Check brake fluid level, correct if necessary | Brake fluid |
Test values for hydraulic braking system
Fixed caliper at rear
Number | Designation | Model 638 | ||
BA42.10-N-1001-01A | Bleed valve to fixed caliper (rear axle) | ITT | Nm | 10 |
Bosch | Nm | 12 | ||
Front axle floating caliper
Number | Designation | Model | ||
BA42.10-N-1001-03A | Bleed valve to floating caliper (front axle) | ITT | Nm | 10 |
Bosch | Nm | 12 | ||
Brembo | Nm | - | ||
Brake system