AR42.10-P-0010-02B | Carrying out bleeding operation | ||
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. |
Front axle brake caliper
Rear axle brake caliper
140 589 03 09 00
Socket wrench
P42.10-0261-06
1 Open bleed screw on brake caliper (1), allow 80 cm3 of brake fluid to drain out free of bubbles; bleeding pressure 2 bar
2 Repeat bleeding procedure at brake calipers 2, 3, 4, allowing approx. 80 cm3 to drain out free of bubbles at each brake caliper.
3 Close bleed screw on brake caliper (1).
P42.10-0260-01
Bleed pressure reservoir of hydraulic unit
This operation only needs to be performed if the reservoir has run empty or work has been carried out on the master brake cylinder, on the precharging pump, on the pressure reservoir, on the hydraulic unit and on the connecting lines.
4 Model 129.076: Connect vehicle wiring harness to master brake cylinder switchover valve (Y61).
P42.40-0237-01
5 Switch off ignition.
6 Loosen bleed screw "SP" and empty pressure reservoir.
7 Tighten bleed screw "SP" and start engine.
8 Loosen bleed screw "SP" until clear, bubble-free brake fluid is discharged
(approx. 80 cm3).
9 Tighten bleed screw "SP" and wait for pressure reservoir to be charged (charging pump runs audibly for approx. 30 s).
10 Switch off engine.