need to get when changing brakes?

The brake pad wear indicator, which protrudes from the side of the pad and is set below the minimum thickness for the pad, rubs against the rotor and causes the squeal. If brakes make a grinding sound, they must be checked immediately.

That fully depends upon if you have 4 wheel drum or disc drum combo. If 4 wheel drum I recommend you have them serviced (clean & function check) every 30 to 40 thousand miles and replaced when they need. This interval is also a good time to flush the brake system fluid.

As the brake linings wear, the shoes must travel a greater distance to reach the drum. In systems fitted with automatic adjusters, when the distance reaches a certain point, a self-adjusting mechanism automatically reacts by adjusting the rest position of the shoes so that they are closer to the drum.

Adjusting trailer drum brakes, what direction does the star turn to expand the shoes? Expert Reply: Turning the wheel so that the teeth on the wheel move upward will expand the brake shoes against the inside of the brake drums. Moving the teeth downward will contract the brake shoes.

While drum brakes do have a completely different layout and mode of operation than disc brakes do, they are usually no more difficult to service, and often require only a basic set of hand tools and a drum brake adjustment tool to get the job done.