If your brakes "heat up" while driving, often the cause is clogged brake hoses. Your foot is strong enough to push the brake fluid through the clogged hose, but the brake shoe springs can't push the fluid back when you take your foot off the brake, so the brakes stay "on" all the time. Prevent trouble, replace now. One end fits in top wheel cylinder and other to car body. Also see rear hose 6-22-36.