Carrying out bleeding operation

AR42.10-S-0010-02A

Carrying out bleeding operation

 Caution

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

Brake fluid notes

AH42.50-P-0001-01A

Model

638

except code BB0 (Antilock brake system (ABS))

except code CL0 (Rear air suspension, lowerable and liftable)

Model

638

with code BB0 (Antilock brake system (ABS))

except code CL0 (Rear air suspension, lowerable and liftable)

Model

638

with code CL0 (Rear air suspension, lowerable and liftable)

except code BB0 (Antilock brake system (ABS))

Modification notes

11.08.2017

Work procedure and presentation updated

Operation steps 1 to 10

 Rear axle fixed caliper

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 638

BA42.10-N-1001-03A

Bleed valve on floating caliper (front axle)

ITT

Nm

10

Bosch

Nm

12

Brembo

Nm

–

1

Bring automatic load-dependent brake controller into full-load position.

 To do this, insert a suitable spacer (2) between lever (1) of automatic load-dependent brake controller and vehicle floor (3) crossmember.

Front axle

Rear axle

2

Remove bleed valve cover at brake caliper.

3

Install bleed bottle vent hose at brake caliper bleed valve.

4

Open brake caliper bleed valve.

5

Leave brake caliper bleed valve open until new brake fluid flows out.

6

Close brake caliper bleed valve.
  Bleed valve on floating caliper (front axle)
  Bleed valve to fixed caliper (rear axle)

7

Remove bleed bottle vent hose from brake caliper bleed valve.

8

Install bleed valve cover at brake caliper.

9

Repeat operation steps 2 to 8 on the remaining brake calipers.

10

Remove spacer (2).