Bleed brake system

AR42.10-P-0010SM

Bleed brake system

10.11.11



Remove

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.

AS42.50-Z-0001-01A

 Danger!

Risk of injury caused by moving parts that can pinch, crush or, in extreme cases even sever extremities.

Always remove ignition key when working on windshield wiper mechanism.

AS82.30-Z-0001-01A



Brake fluid notes

AH42.50-P-0001-01A



Notes on repairs to brake system

AH42.00-P-0003-01A

1.1

Detach right service grill (1)

Model 450.3/4 except 450.418

1.2

Open windshield

Model 450.418

2

Unscrew cap of brake fluid reservoir (2)

3

Connect brake fluid changer to brake fluid reservoir (2) and apply the specified pressure to the brake system

 Observe the operator's manual for the brake fluid changer.

Brake fluid change unit

gotis://B_42/43.2_01



General brake fluid

Sheet 330.1

BB00.40-P-0330-01A



Brake fluids (DOT 4 plus)

Sheet 331.0

BB00.40-P-0331-00A

Danger!

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.

AS00.00-Z-0010-01A

4

Raise vehicle with vehicle lift

 Position the front support plates of the vehicle lift as far as possible upwards, position the rear support plates as far as possible downwards and secure the vehicle to prevent it from slipping or toppling.

5

Remove dust caps from the brake bleeder valves

Bleed primary circuit

6

Connect hose of the brake fluid receptacle to the brake bleeder valve of the right wheel brake cylinder (4) 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.



*BA42.10-P-1001-08C

7

Carry out the bleeding process on the left wheel brake cylinder (4), on the right brake caliper (3) and on the left brake caliper (3) in the same manner

 Observe correct sequence.



*BA42.10-P-1001-08C



*BA42.10-P-1002-03C

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

 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.



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-P-2000-04SM

10

Press dust cap onto brake bleeder valve

11

Lower vehicle with vehicle lift

12

Disconnect brake fluid changer

13

Check brake fluid level and correct if necessary



Brake system - inspect fluid level

AP42.10-P-4210SM



Install

14

Screw on cap of brake fluid reservoir (2)

15.1

Install right service grill (1)

On model 450.3/4 except 450.418

15.2

Install windshield

On model 450.418

AR67.10-P-1000CR

16

Check brake system for leaks

AR42.10-P-0100-01SM

Number

Designation

Model 450.3/4

BA42.10-P-1002-03C

Brake bleeder valve to brake caliper

Nm

7.5

Number

Designation

Model 450.3/4

BA42.10-P-1001-08C

Brake bleed valve to rear axle wheel brake cylinder

Nm

6,5