Bleed brake system

AR42.10-P-0010MCC

Bleed brake system

3.11.14

MODEL

451.3/4

1

Brake fluid reservoir

2

Brake caliper

3

Wheel brake cylinder



Remove

 Danger !

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



Brake fluid notes

AH42.50-P-0001-01A



Notes on repairs to brake system

AH42.00-P-0003-01A

1

Remove dust caps from the brake bleeder valves

2

Lower vehicle with vehicle lift

3

Remove maintenance flap

4

Unscrew cap of brake fluid reservoir (1)

5

Connect brake fluid changer to brake fluid reservoir (1) and apply the specified pressure to the brake system



General brake fluid

MODEL 451.3/4

BB00.40-P-0330-01A



Brake fluids (DOT 4 plus)

MODEL 451.3/4

BB00.40-P-0331-00A

Bleed primary circuit

6

Connect hose of the brake fluid receptacle to the brake bleeder valve of the right wheel brake cylinder (3) and open the brake bleeder valve

 Only close the brake bleeder valve when the brake fluid escapes free of bubbles and without contaminants (light color of brake fluid).
A second person is needed who assists the brake fluid changer by slowly pumping on the brake pedal.



MODEL 451.3/4

*BA42.10-P-1001-08C

7

Carry out the bleeding process on the left wheel brake cylinder (3), on the right brake caliper (2) and on the left brake caliper (2) in the same manner

 Observe correct sequence.



MODEL 451.3/4

*BA42.10-P-1001-08C



MODEL 451.3/4

*BA42.10-P-1002-10A

8

Check brake pedal travel

 In the event of a soft pedal feel or long pedal travel, bleed the secondary circuit of the brake system.

Bleed secondary circuit

9

Connect STAR DIAGNOSIS and bleed the secondary circuit of the brake system



MODEL 451.3/4

AD00.00-P-2000-04MCC

 The instructions for secondary circuit bleeding are specified by STAR DIAGNOSIS.
A second person is needed who assists the brake fluid changer by slowly pumping on the brake pedal.

10

Disconnect brake fluid changer

11

Check brake fluid level and correct if necessary



MODEL 451.3/4

AP42.10-P-4210MCC



Install

12

Screw on cap of brake fluid reservoir (1)

13

Install maintenance flap

14

Raise vehicle with vehicle lift

15

Press dust cap onto brake bleeder valve

16

Check brake system for leaks

MODEL 451.3/4

AR42.10-P-0100-01MCC

 Brake cylinder

Number

Designation

MODEL 451.3/4

BA42.10-P-1001-08C

Brake bleed valve to rear axle wheel brake cylinder

Nm

7

 Front axle floating caliper

Number

Designation

MODEL 451.3/4

BA42.10-P-1002-10A

Brake bleeder valve to brake caliper

Nm

7