Carrying out bleeding operation

AR42.10-D-0010-02TS

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

Notes on externally invisible brake fluid loss

AH42.10-P-9406-02A



000 588 01 82 00 Filling unit

WS25.00-P-0016B

Model

907, 910

 Front axle brake caliper

Number

Designation

Model 907

Model 910

BA42.10-N-1002-10TS

Vent valve at front axle brake caliper

Nm

14

14

 Rear axle brake caliper

Number

Designation

Model 907
except code IT5 (5.0 tonner)

Model 907
with code IT5 (5.0 tonner)

BA42.10-N-1003-12TS

Bleed valve to brake caliper

Nm

14

14

 Rear axle brake caliper

Number

Designation

Model 910

BA42.10-N-1003-12TS

Bleed valve to brake caliper

Nm

14

1

Switch on filling unit and set bleed pressure to 2.0 bar.

2

Remove caps from bleed valves on all brake calipers (1, 2, 3, 4).

3

Mount vent hose of bleed bottle to bleed valve of rear right brake caliper (1).

4

Open bleed valve of brake caliper (1).

5.1

To bleed the hydraulic system of the brake system if the hydraulic system was opened for repair purposes.
Repeatedly operate brake pedal until new brake fluid flows out without any bubbles.

 To bleed the brake system correctly it is absolutely essential to pump the brake pedal throughout the entire bleeding process.
Otherwise, brake system malfunctions and a failure of the brake system may occur due to remaining residual air.

 To prevent air from being drawn in, do not pump the brake pedal in a jerking manner but instead release it slowly.
Otherwise, an extension or a repetition of the bleed procedure may be necessary.

 Aid of helper required.

 The bleed valve of the brake caliper (1) can remain open throughout the entire pumping procedure.
Total quantity of brake fluid required: Approx. 1.7 l.

5.2

To replace the brake fluid if the brake system's hydraulic system was not opened beforehand for repair purposes.
Leave bleed valve of brake caliper (1) open, until new brake fluid flows out.

 Pumping of the brake pedal is not necessary.
Total quantity of brake fluid required: Approx. 0.8 l.

6

Close bleed valve of brake caliper (1).
  Brake caliper (2, 4)
  Brake caliper (1, 3)

7

Remove vent hose of bleed bottle from bleed valve of brake caliper (1).

8

Repeat operation steps 3   to7 on remaining brake calipers (2, 3, 4).

 Process brake calipers (2, 3, 4) in numerical order.

9

Fit caps for bleed valves onto all brake calipers (1, 2, 3, 4).

10

Switch off filling unit.