how to adjust drum brakes

The good news is that brake drums are forgiving, and there’s play built into the system. In a perfect world, drum brakes would self-adjust the way disc brakes do. In disc brakes, the caliper piston extends more and more as the pads wear.

What happens if you over adjust drum brakes?

Drum brakes are adjusted to compensate for normal wear. If they are over adjusted, the brakes can lock up, or be activated with very little pressure on the brake pedal. The brake shoe adjuster resets the distance between the drum and shoe during normal driving.

How do I know if my drum brakes need to be adjusted?

Technical Bulletins
Inconsistent brake pedal feel. If the rear brakes are drum brakes, the driver may feel vibrations under braking. Hand brake feels loose. If the hand brake requires a hard yank to keep the car from rolling off, chances are the brake shoes need replacing. Scraping noise while braking.

How much drag should drum brakes have?

After the pads hit the drum, back the star wheel off by one click. Spin the drum with your hand and feel for any drag. The drum should spin freely with very minimal drag. If too much drag is present, then back off the star adjuster slightly.

Which way do you turn a drum brake adjuster?

Turn the brake adjuster clockwise or anti-clockwise to feel where you need to turn it to. It is important to note that the most drum brake adjustment direction is clockwise. As you apply your screwdriver downwards the brake adjuster moves upward to bring the brake shoes closer to the drum.

How often should you adjust drum brakes?

So manual adjustment is usually necessary every 15k miles. You don’t have to pull off the drum to adjust drum brakes..

Why are my drum brakes dragging?

Brake dragging is commonly caused by broken or weak springs on the drum brakes. It can also be due to a corroded or jammed caliper piston or a caliper that has corroded bushings or mounting pins. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as overextended self-adjusters.

What tool is used to adjust the brake shoes before the drum is installed?

Tech A says that a brake spoon is used to adjust brake shoes when the drum is installed. Tech B says that a brake hold-down spring tool is used to remove and install hold-down springs.

What is brake adjustment when is it required?

They need adjusting when there is an increase in the travel of the brake pedal before the brakes come on. Drum-brake shoes are adjusted so that each shoe almost touches the drum inside. A touch on the brake pedal makes each shoe press against its drum instantly.

What is a brake spoon?

The brake spoon adjusts the ratching mechanism through the slot in the backing plate on conventional brake shoe fitted vehicles.