Remove/check/install front axle brake pads

AR42.10-D-1600H

Remove/check/install front axle brake pads

28.03.2018

Model

900, 906

2

Cap

4

Brake caliper

X88/13

Right front brake pad contact sensor connector

3

Screw

5

Anti-rattle spring

X88/14

Left front brake pad contact sensor connector

 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 repairs to brake system

AH42.00-P-0003-01A

Topical note

Brake fluid notes

AH42.50-P-0001-01A

Notes on evaluating brake disks

AH42.10-N-9406-07B

 

Remove/install

1

Unscrew lid from brake fluid reservoir

2

Remove front wheels

Remove/install wheels

AR40.10-D-1100H

3

Detach left front brake pad contact sensor connection (X88/14) or right front brake pad contact sensor connection (X88/13)


Use straight or angled needle nose pliers.
Otherwise, damage may occur.

4

Remove cover (2)

 Installation:
Replace cap (2) and coat inside with assembly grease from parts kit.
Otherwise, moisture may enter and cause the sliding caliper to corrode tight in the guide.

5

Unscrew bolt (3)

 Installation: Replace screw/bolt(3).

 Guide pin/catch bolt, top section of brake caliper to brake caliper support

*BA42.10-N-1004-10H

6

Fold brake caliper (4) upwards, secure against falling down and remove brake linings

 Do not use bushing seat as hooking- in point. Dispose of brake pads as special waste. The local authorities can provide information regarding whether disposal is also permitted as industrial waste similar to domestic waste.

 Installation: Do not apply any brake paste or assembly grease to the brake linings. Always replace brake pad contact sensor and mount onto outer brake lining. When snapping shut the brake caliper, pay attention to the protective boot of the pilot bushing. Only brake linings approved by Mercedes-Benz may be installed as a complete set.

7

Clean brake parts and check for wear and damage

Inspect condition of brake system

AR42.10-D-1600-11A

 Check anti-rattle springs (5) and replace, if necessary.

Brake lining wear limit

*BE42.10-N-1001-10A

Brake disk

*BE42.10-N-1001-08B

 Caliper gage

*124589051900

 Brake caliper brush

*000589266800

8

Push back piston

Push back piston

AR42.10-D-1600-09A

 If the brake fluid level in the reservoir is too high, suction off a little brake fluid.

 Resetting device

*000589524300

9

Install in the reverse order

10

Build up brake pressure by fully depressing brake pedal several times

11

Check fluid level in reservoir; correct if necessary



Hydraulic brake system - check fluid level, correct if necessary

AP42.50-D-4210H

12

Check brake system for leaks

Check brake system for leaks

AR42.10-S-0100-01S

Check values for front axle brake disks

Number

Designation

Model 900

Model 906

BE42.10-N-1001-08B

Brake disk

Thickness when new

mm

28

28

Wear limit

mm

25

25

Lateral runout

mm

 0,03

 0,03

Flatness deviation

mm

 0,04

 0,04

Repair limit dimension

mm

-

-

Test and adjustment values for service brake

Number

Designation

Model 900

Model 906

BE42.10-N-1001-10A

Brake lining wear limit

mm

3

3

 Front axle brake caliper

Number

Designation

Model 900

Model 906

BA42.10-N-1004-10H

Guide pin/catch bolt, top section of brake caliper to brake caliper support

M8

Nm

34

34