AR42.10-P-1600R Remove/Check/Install Front Axle Brake Pads
Remove/check/install Front Axle Brake Pads
Shown On Front Axle Mocel 230.475:
Remove/Install
DANGER:
- Risk of death. Death may result if vehicle slips or topples from the lifting platform.
- Align vehicle between the columns of the lifting platform and position the four support plates at the lifting platform support points specified by the vehicle manufacturer.
- Risk of injury, body parts may become jammed or crushed. Risk of injury, skin and eyes may be injured due to brake fluid spraying out at high pressure when working on the SBC brake system
- Deactivate SBC brake system using STAR DIAGNOSIS.
- Risk of poisoning from swallowing brake fluid. Risk of injury from brake fluid coming into contact with skin and eyes.
- Pour brake fluid only into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.
1 Deactivate SBC brake system using STAR DIAGNOSIS.
CAUTION: See notes on repairs to brake system
2 Lower fluid level in expansion reservoir for brake fluid to "Min" mark
NOTE: To prevent the brake fluid reservoir overflowing when pushing back the fixed caliper piston.
CAUTION: See notes on handling brake fluid
3 Remove the front wheels
4 Unplug left and right front brake pad contact sensor connector (S10/1x1, S10/2x1)
5 Drive out retaining pins (41) using a drift (035)
NOTE: Installation: Drive in retaining pins as far as the stop using a drift.
6 Remove spring steel sheet (31d)
7 Pull brake pads (43) out of fixed caliper (31a)
NOTE: If the brake pads are stuck, use the lever (034)
CAUTION:
- When pressing out the brake pads, insert a wooden or plastic wedge between the lever (034) and fixed caliper.
- Installation: Do not use sharp-edged or pointed implements to clean the brake pad guides. Install front axle brake pads (43) with panel (43a) dry. The marking (see arrow) on the panel (43a) must point in the direction of rotation of the relevant wheel.
NOTE:
- Only brake pad kits approved by Mercedes Benz must be installed.
- Brake pads are to be disposed of as special waste. Please ask local authorities if it is permitted to dispose of these parts as household-like industrial refuse.
8 Press left and right front brake pad contact sensor (S10/1, S10/2) out of pad backing plate of brake pad (43)
CAUTION:
- Installation: Defective contact sensors should be replaced.
- See note on installing contact sensor for brake lining wear indicator
Measuring
9 Measure lining thickness of brake pads and check condition of brake disks
Inspect
10 Check fixed caliper (31a) for leaks and dust seal for damage
- If the fixed caliper is leaking or the dust seal is damaged then replace front axle brake caliper
11 Press back piston using resetting device (031)
NOTE: On 4-piston fixed calipers on the front axle, secure one pair of opposing pistons with plastic wedges to prevent them from sliding out. Then press back the other pair of pistons using the resetting device.
- If the piston is difficult to move then replace brake caliper on front axle.
12 If necessary, clean the perforation of brake disks
NOTE: Use a drift or dia 4.3 mm drill bit for cleaning.
13 Install in the reverse order
14 Activate SBC brake system using STAR DIAGNOSIS.
15 Use STAR DIAGNOSIS to move brake pads toward brake disks
16 Inspect fluid level in expansion reservoir, adjust to correct level if necessary