Remove/check/install front axle brake pads

AR42.10-S-1610E

Remove/check/install front axle brake pads

26.11.2015

Model

447, 448

1

Electrical connector

2

Bolt

3

Brake caliper

4

Caliper support

5

Brake pad

S10/2

Right front brake wear sensor

 Danger !

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

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

AS00.00-Z-0010-01A

 Danger !

Risk of accident when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work.

Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system.

AS42.50-Z-0002-01A

 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



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Brake fluid notes

AH42.50-P-0001-01A



Notes on repairs to brake system

AH42.00-P-0003-01A

 

Remove/install

1

Unscrew cap of brake fluid reservoir

 Installation: Only correct the brake fluid level after actuating the brake pedal several times. The brake linings (5) must make contact with the brake disk. Firm resistance should be noticeable at the brake pedal.

2

Remove front wheels

AR40.10-S-1100E

3

Disconnect electrical connector (1)

 Installation: Ensure electrical line of electrical connection (1) is routed correctly.

4

Remove caps from bolts (2)

 Installation:
Coat inner side of caps of screws/bolts (2) with assembly grease included in the repair kit.
The bolts (2) can otherwise corrode.

5

Remove lower bolt (2) and swivel brake caliper (3) upward

 Installation:
When swiveling the brake caliper (3) downward, do not damage the protective boot of the pilot bushing.
The pilot bushing can otherwise corrode.

 Installation: Replace lower bolt (2).

 Screw/bolt, floating caliper to floating caliper carrier

*BA42.10-N-1003-03B

6

Remove brake linings (5) from brake caliper support (4)

 Installation:
Do not apply any brake paste or assembly grease.
This can otherwise cause the brake system to malfunction.

 Installation: Install outer right brake lining (5) with right front brake wear sensor (S10/2).



Check

7

Check brake linings (5) and brake disks for wear and damage



Notes on evaluating brake disks

AH42.10-N-9406-07B

Depending on findings



Replace brake linings (5) or brake disks.

Remove/install front axle brake disk

AR42.10-S-0230E

8

Check brake hoses for wear and damage

Depending on findings



Replace relevant brake hose.

Remove/install brake hoses at front axle

AR42.10-S-0024E

9

Press back piston of brake caliper (3)


The dust boot must not protrude in this position.
The dust boot can otherwise be damaged.

 If the brake fluid level in the brake fluid reservoir is too high, extract some brake fluid.
Commercially available devices/tools
Extraction bellows

 Resetting device

*000589524300

If piston is sluggish or dust boot damaged.



Replace relevant brake caliper (3).

Remove/install front axle brake caliper

AR42.10-S-0070E

10

Remove side plates of brake linings (5) from brake caliper support (4)

 The sliding plates need only be replaced if damage is visible.



Clean

11

Clean contact surfaces of brake linings (5) at brake caliper support (4) and at brake caliper (3)

 Brake caliper brush

*000589266800

12

Install in the reverse order



Check

13

Carry out brake test on the test stand



Brake test

AP42.00-S-4290E

 Front axle floating caliper

Number

Designation

Model 447, 448

BA42.10-N-1003-03B

Screw/bolt, floating caliper to floating caliper carrier

Nm

34