Drum Brake Not Working

A mechanic will measure the drums to gauge whether or not they need to be replaced or if they can be turned instead.

Drum cover jumpin jack flash. In a discdrum application the automatic adjusters play an important role in maintaining proper brake balance when the shoes are seating to the drum. First check the vehicle and trailer connectors for corrosion. A groove worn in the lever can prevent the adjuster from working properly.

Rotate the wheel up until it becomes difficult to turn the hub and drum. If the damage to the brake drum is bad enough it will begin to cause problems with the brake shoes. In most cases brake drums will be replaced in pairs due to the issues that have one new and one worn drum can cause.

Remove the new drum from the packaging and compare it to the old drum to ensure they have the same diameter. Various brake designs such as band brakes and many drum brakes are self assisting. A groove can be worn in the lever and the notched wheel will also wear.

This is the brake adjuster. You will want to use a flat head screw driver or a brake adjustment tool like part w80630 to turn the star gear. This can cause a short inside the connector and the brake feed circuit and ground are at the bottom of the connector so moisture affects these connections first.

The term drum brake usually means a brake in which shoes press on the inner surface of the drum. A drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating cylinder shaped part called a brake drum. Place the new drum over the brake shoe set and screw the axle nut on to hold it in place.

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. A drum brake system consists of hydraulic wheel cylinders brake shoes and a brake drum.

When shoes press on the outside of the drum it is usually called a clasp brakewhere the drum is pinched between two shoes similar to a. This is called positive feedback or self servoself assist reduces the input force needed to apply the brake but exaggerates fade since a reduction in pad friction material height or. Rotating the wheel up will press the brake shoes against the drum.

A new drum is required to allow the brakes to seat properly onto the new braking surface. When the brake is applied some of the braking force feeds back into the brake mechanism to further self apply the brake. When the brake pedal is applied the two curved brake shoes which have a friction material lining are forced by hydraulic wheel cylinders against the inner surface of a rotating brake drum.