P42.10-2048-06
10c Brake circuit plug
10d Booster circuit plug
11a Booster circuit bleed screw
11b Brake circuit bleed screw
A7/6 Brake booster hydraulic unit
Picture item, etc. | Work instructions | ||
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. | |
| Notes on handling brake fluid | ||
| Notes on repairs to brake system | ||
| The brake fluid reservoir must not be completely drained so that no air enters the system. If the brake fluid reservoir is completely emptied, the entire bleeding procedure must be repeated. The brake system can only be bled with two persons. | ||
1 | Remove wiper arms | ||
| Remove and install wiper arm | ||
2 | Remove water repellent | The water deflector is attached with 4 expansion rivets. | |
3 | Record fluid level of brake fluid reservoir | ||
4 | Switch off ignition | ||
5 | Unscrew brake circuit reservoir cap (10c) and extract brake fluid down to a fluid level of approx. 10 mm | ||
6 | Connect brake fluid changing equipment to plug on brake circuit (10c) and switch on | Pay attention to manufacturer's operating instructions. Bleed pressure approx. 2 bar. | |
Brake fluid change unit gotis://B_42/43.2_01 | |||
7 | Replace brake fluid at the rear axle | Start at the brake caliper with the longest feed line. Exert pressure on brake pedal and open bleed screw while fully depressing the brake pedal. Close bleed screw again and gradually release brake pedal. | |
Repeat procedure until the fresh brake fluid emerges free of bubbles (approx. | |||
Bleed screw to brake caliper | |||
8 | Replace brake fluid at the front axle | Start at the brake caliper with the longest feed line. Exert pressure on brake pedal and open bleed screw while fully depressing the brake pedal. Close bleed screw again and gradually release brake pedal. | |
Repeat procedure until the fresh brake fluid emerges free of bubbles (approx. | |||
Bleed screw to brake caliper | |||
9 | Replace brake fluid for brake booster hydraulic unit via the brake circuit bleed screw (11b) | Exert pressure on brake pedal and open bleed screw while fully depressing the brake pedal. Close bleed screw again and gradually release brake pedal. | |
Repeat procedure until the fresh brake fluid emerges free of bubbles (approx. | |||
Bleed screw on brake booster hydraulic unit | |||
10 | Switch off brake fluid changing equipment and disconnect from plug on brake circuit (10c) | ||
11 | Unscrew booster circuit reservoir cap (10d) and fill container without pressure | Do not connect brake fluid changing equipment yet. | |
12 | Connect brake fluid changing equipment to plug on booster circuit (10d) and switch on | Pay attention to manufacturer's operating instructions. Bleed pressure approx. 2 bar. | |
Brake fluid change unit gotis://B_42/43.2_01 | |||
13 | Switch on ignition and switch off brake fluid changing equipment simultaneously | The booster circuit pump starts up. | |
14 | Once the booster circuit pump is switched off, fully depress the brake pedal approx. 10 times as far as the stop | Booster circuit pump starts up again. | |
15 | After repeated shutoff of booster circuit pump, drain brake fluid in hydraulic unit via bleed screw of booster circuit (11a) while pressing the brake pedal and fill in new fluid. | Carefully open booster circuit bleed screw (11a) (high pressure). Secure bleed hose to prevent it from slipping. | |
16 | Close booster circuit bleed screw (11a) again and slowly ease off brake pedal. | Repeat procedure until the fresh brake fluid emerges free of bubbles. | |
Bleed screw on brake booster hydraulic unit | |||
17 | Switch off ignition | ||
18 | Disconnect brake fluid changing equipment | ||
19 | Relieve the pressure in the reservoir; for this purpose, depress the brake pedal 30 times as far as the stop | While actuating the brake pedal, check the fluid level in the reservoir; interrupt actuation and extract brake fluid if necessary. | |
20 | Correct brake fluid levels in brake fluid reservoir | Booster circuit (11d) up to "MAX" The fluid level may drop below the "MIN" mark when the ignition is switched on. Brake circuit (10c) between "MAX" and "MIN" depending on the condition of the brake disks and brake linings. | |
21 | Screw on cap |
Front axle brake caliper
Number | Designation | Model 220 | ||
BA42.10-P-1002-10G | Bleed screw to brake caliper | Nm | 14 | |
Rear axle brake caliper
Number | Designation | Model | ||
BA42.10-P-1002-12G | Bleed screw to brake caliper | Nm | 14 | |
Brake system hydraulics