Most vehicle's brake systems are simple enough to be adjusted without professional assistance. Disc brakes and drum brakes typically feature tools for automatic adjustment, allowing vehicle owners to reduce brake pedal travel through a simple procedure.
While automatic adjustment mechanisms are common on drum brakes, manually adjustable drum brakes also exist and typically feature a single adjuster. This adjuster can seize up due to exposure to weather and dirt, making lubrication necessary prior to adjustment. Common manual adjustment mechanisms include star-wheel adjusters, wedge adjusters and snail-cam type adjusters. Generally, the amount of turning required to manually adjust drum and disc brakes is small.