Mercedes-Benz Parts Catalog Mercedes-Benz Accessories Catalog Mercedes-Benz Technical Articles Mercedes-Benz Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
Bookmark and Share

Pelican Technical Article:

Parking Brake Shoes Replacement

Kerry Jonsson

Time:

2 hours2 hrs

Tab:

$100

Talent:

***

Tools:

pliers, spring tool

Applicable Models:

Mercedes-Benz R129 (1990-02)

Parts Required:

Parking brake shoes

Hot Tip:

Have brake cleaner handy to clean parking brake pad area

Performance Gain:

Pull up and hand brake and actually have car hold on a hill

Complementary Modification:

Replace rear brake pads at the same time
Your parking brake system is an emergency brake system. It is not meant to slow the car down to a stop but it can at low speeds. Hydraulic brake systems generate hundreds of psi to clamp down on the brakes and slow down the car. Your parking brake system is only levers and cables and does not have the necessary strength to slow down the vehicle from high speed. As you press on the parking brake pedal the lever effect pulls on a cable that runs through the body of the car. This cable pulls on a linkage inside the back of your rear brake rotor where, if you are experienced enough, it looks like an older drum braking system. As the linkage is pulled it separates two brake shoes in the inner drum of the rear brake rotor, therefore holding the car still. As time passes by or you forget to release the parking brake the shoes wear out. The backing plates of the shoes start to grind into the brake rotor. This causes a brake grinding noise that some might mistake for the rear brake pads. In this tech article we will go over all the steps to remove your parking brake pads so you can install new ones.

    In order to replace your parking brake shoes you will need to lift and support your vehicle and remove your rear calipers. See our tech article on jacking up and supporting your vehicle and removing your rear calipers.
ThisPicture illustrates the left side rear rotor with the brake caliper already removed.
Figure 1

ThisPicture illustrates the left side rear rotor with the brake caliper already removed. Remove the 5 mm Allen head fastener (green arrow). You can use the hand impact tool if the fastener is tight.

If the brake rotor is seized on the hub flange you can tap it off with a hammer.
Figure 2

If the brake rotor is seized on the hub flange you can tap it off with a hammer.

There is a chance the rotor will be very difficult to get off because of the lip formed on the inner part of the brake rotor from the parking brake shoes.
Figure 3

There is a chance the rotor will be very difficult to get off because of the lip formed on the inner part of the brake rotor from the parking brake shoes. You are going to have to adjust the parking brake anyway because of the new rotors. Rotate the brake rotor until there is one lug fastener hole at the 2 o'clock position. Use a flat head screw driver to insert in the lug fastener hole and lever up on the adjustment pawl in the direction of the blue arrow to bring the parking brake shoe in. It should now be easier to pull off the rotor. Installation is the reverse of the removal steps. Fit the brake rotor onto the hub flange. Install and tighten the fastener. Install your brake caliper and brakes. See our tech articles on brake caliper removal and brake pad removal.

Rotate the brake flange until the two service holes (green arrows) line up with the two parking brake shoes mounting spring.
Figure 4

Rotate the brake flange until the two service holes (green arrows) line up with the two parking brake shoes mounting spring.

Using needle nose pliers insert them in the service hole and go through the center of the mounting spring.
Figure 5

Using needle nose pliers insert them in the service hole and go through the center of the mounting spring. Grip the inner pin and push it inward. While pushing it inward rotate the spring 90° to unhook it from the backing plate. You may have to wiggle around the spring until it unhooks.

Pull the spring out of the upper brake pad shoe.
Figure 6

Pull the spring out of the upper brake pad shoe.

Do the same thing for the lower parking brake mounting spring.
Figure 7

Do the same thing for the lower parking brake mounting spring. Using needle nose pliers insert them in the service hole and go through the center of the mounting spring. Grip the inner pin and push it inward. While pushing it inward rotate the spring 90° to unhook it from the backing plate. You may have to wiggle around the spring until it unhooks.

Pull the spring out of the lower brake pad shoe.
Figure 8

Pull the spring out of the lower brake pad shoe.

The springs to pull the parking brake shoes are very strong so it would be difficult to just grab them and separate the pads around the hub.
Figure 9

The springs to pull the parking brake shoes are very strong so it would be difficult to just grab them and separate the pads around the hub. I like to pry up on one of the pads to separate the adjuster.

Pull the adjuster out from between the two brake shoe ends.
Figure 10

Pull the adjuster out from between the two brake shoe ends.

Unhook the spring (green arrow) that pulls the two brake shoes towards each other.
Figure 11

Unhook the spring (green arrow) that pulls the two brake shoes towards each other.

Now it is easier to separate the pads around the hub flange with only one spring still connected.
Figure 12

Now it is easier to separate the pads around the hub flange with only one spring still connected.

Inspect the parking brake adjuster and make sure you can thread it in and out.
Figure 13

Inspect the parking brake adjuster and make sure you can thread it in and out. It would not be a bad idea to replace it along with other parking brake hardware.

Clean the backing plate with brake clean and apply a small amount of lubricant to where you see the parking brake shoe come in contact with the backing plate (green arrows).
Figure 14

Clean the backing plate with brake clean and apply a small amount of lubricant to where you see the parking brake shoe come in contact with the backing plate (green arrows). Some are hidden behind the hub flange in this photo.

Installation is the reverse of the removal steps.
Figure 15

Installation is the reverse of the removal steps. Twist the adjuster all the way in. Assemble one spring holder with the adjuster in place asPictured here. Wrap the two shoes around the flange and attach the spring that holds the other side of the shoes. Install the two mounting springs by inserting them sideways, compress the spring and twist 90° either way. Fit on the brake rotor and adjust the parking brake. Fit the caliper bracket, brake pads and caliper to the spindle. Fit the wheel and drop the car.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Sat 12/3/2016 02:29:18 AM