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Replacing Your Parking Brake Shoes
 
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Pelican Technical Article:

Replacing Your Parking Brake Shoes

Steve Vernon

Time:

3 hours3 hrs

Tab:

$35

Talent:

***

Tools:

17mm socket, pliers, long flat head screwdriver, 7/16? socket, 5mm Allen

Applicable Models:

Mercedes-Benz W124 (1986-95)

Parts Required:

New parking brake pad set

Hot Tip:

Make sure the parking brake is off

Performance Gain:

Car doesn't roll down hills

Complementary Modification:

Replace rear shoes and discs

If your parking brake is not functioning properly, then perhaps it's time to replace your parking brake shoes. The parking brake shoes can only be inspected after the removal of the rear brake calipers and discs. You will need to safely raise and support the vehicle. Please see our article on jacking up your W124 for more information. Warning: In high corrosion areas the brake backing plate-heat shield must be inspected before attempting brake shoe replacement or adjustment. If it is in bad shape you will need to replace them. Note: The hub must be removed to replace the backing plate, destroying the wheel bearing.

After you have safely raised and supported the car remove the rear wheels.
Figure 1

After you have safely raised and supported the car remove the rear wheels. With the wheels off you will need to remove the rear caliper (yellow arrow), brake pads (green arrow) and the rotor (red arrow).

Remove the brake pads and caliper and safely hang the caliper out of the way (red arrow).
Figure 2

Remove the brake pads and caliper and safely hang the caliper out of the way (red arrow). Do not let the caliper hang by the brake line. Next remove the rotor (yellow arrow). Please see our articles on brake pad, caliper and rotor removal for additional assistance.

Pull the rotor off and you will see the parking brake assembly.
Figure 3

Pull the rotor off and you will see the parking brake assembly. You will be working with the shoes and the tensioner (yellow arrow), the retaining springs (green arrows) and the expander (red arrow).

Spin the axle flange so you can get access to one of the retaining springs.
Figure 4

Spin the axle flange so you can get access to one of the retaining springs.

Use a 7/16
Figure 5

Use a 7/16" socket, compress the retaining spring and turn it 90 degrees. Doing this will release the spring from its hole (red arrow) so you can remove it.

Remove one side of the lower spring by the separator (yellow arrows).
Figure 6

Remove one side of the lower spring by the separator (yellow arrows).

With the top spring and tensioner attached, pull the shoes apart so you can get them over the axle and remove them.
Figure 7

With the top spring and tensioner attached, pull the shoes apart so you can get them over the axle and remove them. This is what the assembly should look like when you take it off.

Preassemble the new shoes so they look likePicture 7.
Figure 8

Pre-assemble the new shoes so they look like Picture 7. Stretch them over the axle flange and sit the lower part of the shoes in the expander grooves (green arrows).

Reinstall the lower spring and the two retaining clips.
Figure 9

Reinstall the lower spring and the two retaining clips. Make sure the tensioner is retracted all the way. Depending on how much wear there was on your old shoes will depend on how much adjustment you will need to make. After you put the disc back on, adjust the tensioner until it grabs the disc then back it off so the disc spins freely.










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